SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (date of earliest event reported): June 27, 2001

Commission file number: 1-12215

QUEST DIAGNOSTICS INCORPORATED
One Malcolm Avenue
Teterboro, NJ 07608
(201) 393-5000

DELAWARE
(State of Incorporation)

16-1387862
(I.R.S. Employer Identification Number)


Item 5. Other Events.

On June 27, 2001, Quest Diagnostics Incorporated (the "Company") completed its previously announced refinancing of a majority of its long-term debt. Specifically, the Company completed a $550 million senior notes offering and entered into a new $500 million senior unsecured credit facility which included a $175 million term loan. The Company used the net proceeds from the senior notes offering and new term loan, together with its cash on hand, to repay all of the $584 million which was outstanding under its existing senior secured facility, including the costs to settle existing interest rate swap agreements, and to consummate its previously announced cash tender offer and consent solicitation for its 10 3/4% senior subordinated notes due 2006 (the "Subordinated Notes"). The refinancing is expected to lower annual interest expense by approximately $23 million.

The senior notes were issued in two tranches: (a) $275,000,000 aggregate principal amount of 6 3/4% senior notes due 2006 and (b) $275,000,000 aggregate principal amount of 7 1/2% senior notes due 2011. The proceeds from the senior notes offerings aggregated approximately $544 million after payment of underwriting discounts, but before the payment of expenses related to the offering. The senior notes were registered under the Securities Act of 1933, as amended, and were issued from the Company's existing shelf registration statement on Form S-3 (Registration No. 333-54310). The senior notes were issued under an Indenture dated as of June 27, 2001, as supplemented by the First Supplemental Indenture dated as of June 27, 2001, in each case, among the Company, the Subsidiary Guarantors, and The Bank of New York, as trustee (the "Trustee"). The senior notes are guaranteed by each of the Company's wholly owned subsidiaries that operate clinical laboratories in the United States (the "Subsidiary Guarantors"). The Subsidiary Guarantors of the senior notes are the same subsidiaries that guaranteed the Company's Subordinated Notes. The "Subsidiary Guarantors" are Quest Diagnostics Holdings Incorporated, Quest Diagnostics Clinical Laboratories, Inc., Quest Diagnostics Incorporated (CA), Quest Diagnostics Incorporated (MD), Quest Diagnostics LLC, Quest Diagnostics Incorporated (MI), Quest Diagnostics Incorporated (CT), Quest Diagnostics Incorporated (MA), Quest Diagnostics of Pennsylvania Inc., Quest Diagnostics Incorporated (OH), MetWest Inc., Nichols Institute Diagnostics, DPD Holdings, Inc., Diagnostics Reference Services Inc., Laboratory Holdings Incorporated, Pathology Building Partnership, Quest Diagnostics Investments Incorporated and Quest Diagnostics Finance Incorporated. The senior notes were sold pursuant to a purchase agreement dated June 20, 2001 among the Company, the Subsidiary Guarantors and Merrill Lynch, Pierce, Fenner & Smith Incorporated, Credit Suisse First Boston Corporation, Banc of America Securities LLC, UBS Warburg LLC, Wachovia Securities, Inc., and BNY Capital Markets, Inc. (the "Underwriters"). The Purchase Agreement, the form of the 6 3/4% Senior Notes, the form of the 7 1/2% Senior Notes, the Indenture, and the First Supplemental Indenture are attached hereto as Exhibits 1.1, 4.1, 4.2, 4.3, and 4.4, respectively.

The Company's new senior unsecured credit facility consists of the five-year $175 million amortizing term loan referred to above and a five-year $325 million revolving credit facility. As of June 30, 2001, the Company had approximately $300 million of available borrowings under the revolving credit facility due to the issuance of letters of credit. There were no loans outstanding under the revolving credit facility as of June 30, 2001. The Company's current borrowing rate on LIBOR-based loans is LIBOR plus 1.3125% and the borrowing spread may change based upon changes in the Company's credit ratings. The obligations of the Company under the Credit Agreement described below are guaranteed by the Subsidiary Guarantors (i.e., the same subsidiaries that


guaranteed the senior notes). The Credit Agreement contains various covenants, including the maintenance of two financial ratios, restrictions on our and subsidiaries' ability to, among other things, incur additional indebtedness, and restrictions on our ability to, among other things, repurchase shares of our outstanding common stock, make additional investments and consummate acquisitions. The Credit Agreement dated as of June 27, 2001 among the Company, the Subsidiary Guarantors and Bank of America, N.A., UBS AG, Merrill Lynch Capital Corporation, Credit Suisse First Boston, The Bank of New York, Wachovia Bank, N.A., Fleet National Bank, Sumitomo Mitsui Banking Corporation, Allfirst Bank, Bankers Trust Company, The Mitsubishi Trust and Banking Corporation, PNC Bank, Fifth Third Bank, E. Sun Commercial Bank Ltd. (collectively, the "Banks"), is attached hereto as Exhibit 10.1.

The cash tender offer for the Company's Subordinated Notes expired as scheduled at 5:00 p.m. New York City time on June 27, 2001. As of the expiration date, approximately $147 million in aggregate principal amount, or 98% of the $150 million of outstanding Subordinated Notes had been validly tendered and not withdrawn. In addition, the Company received the requisite consents from the holders of Subordinated Notes to amend the indenture to eliminate substantially all of its restrictive provisions. The Company has made payments of approximately $160 million to holders with respect to the cash tender offer and consent solicitation including premium and accrued interest. The Fifth Supplemental Indenture dated as of June 27, 2001, to the Indenture dated as of December 16, 1996 among the Company, the subsidiary guarantors party thereto and The Bank of New York, as trustee with respect to the Subordinated Notes is attached hereto as Exhibit 4.5.

Item 7. Financial Statements and Exhibits.

(c) The following exhibits are filed as part of this report on Form 8-K:

1.1 Purchase Agreement, dated June 20, 2001, among the Company, the Subsidiary Guarantors, and the Underwriters.

4.1 Form of 6 3/4% Senior Notes due 2006, including the form of guarantee endorsed thereon.

4.2 Form of 7 1/2% Senior Notes due 2011, including the form of guarantee endorsed thereon.

4.3 Indenture dated as of June 27, 2001, among the Company, the Subsidiary Guarantors, and the Trustee.

4.4 First Supplemental Indenture, dated as of June 27, 2001, among the Company, the Subsidiary Guarantors, and the Trustee to the Indenture referred to in 4.3 above.

4.5 Fifth Supplemental Indenture, dated as of June 27, 2001 to the Indenture dated as of December 16, 1996,


among the Company, the subsidiary guarantors party thereto and The Bank of New York, as trustee.

10.1 Credit Agreement, dated as of June 27, 2001, among the Company, the Subsidiary Guarantors and the Banks.


SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

QUEST DIAGNOSTICS INCORPORATED

Date:  July 2, 2001                       By:      /s/ Leo C. Farrenkopf, Jr.
                                             -----------------------------------
                                          Name:   Leo C. Farrenkopf, Jr.
                                          Title:  Vice President, Secretary, and
                                                  Deputy General Counsel


EXHIBIT INDEX

Exhibit No.    Description
-----------    -----------

1.1            Purchase Agreement, dated June 20, 2001, among the Company, the
               Subsidiary Guarantors, and the Underwriters.

4.1            Form of 6 3/4% Senior Notes due 2006, including the form of
               guarantee endorsed thereon.

4.2            Form of 7 1/2% Senior Notes due 2011, including the form of
               guarantee endorsed thereon.

4.3            Indenture dated as of June 27, 2001, among the Company, the
               Subsidiary Guarantors, and the Trustee.

4.4            First Supplemental Indenture, dated as of June 27, 2001, among
               the Company, the Subsidiary Guarantors, and the Trustee to the
               Indenture referred to in 4.3 above.

4.5            Fifth Supplemental Indenture, dated as of June 27, 2001 to the
               Indenture dated as of December 16, 1996, among the Company, the
               subsidiary guarantors party thereto and The Bank of New York, as
               trustee.

10.1           Credit Agreement, dated as of June 27, 2001, among the Company,
               the Subsidiary Guarantors and the Banks.


Exhibit 1.1



QUEST DIAGNOSTICS INCORPORATED
(a Delaware corporation)

6 3/4% Senior Notes Due 2006
7 1/2% Senior Notes Due 2011

PURCHASE AGREEMENT

Dated: June 20, 2001




                                Table of Contents
                                                                                                       Page
                                                                                                       ----

SECTION 1.        Representations and Warranties.........................................................4

         (a)      Representations and Warranties by the Company and the Guarantors.......................4
                  (i)        Compliance with Registration Requirements...................................4
                  (ii)       Incorporated Documents......................................................4
                  (iii)      Independent Accountants.....................................................5
                  (iv)       Financial Statements........................................................5
                  (v)        No Material Adverse Change in Business......................................5
                  (vi)       Good Standing of the Company................................................6
                  (vii)      Good Standing of Subsidiaries...............................................6
                  (viii)     Authorization of Agreement..................................................7
                  (ix)       Authorization and Description of the Indenture..............................7
                  (x)        Authorization and Description of Securities and Guarantees..................7
                  (xi)       Authorization and Description of the Refinancing Transactions...............8
                  (xii)      Non-Guarantor Subsidiaries..................................................8
                  (xiii)     Absence of Defaults and Conflicts...........................................8
                  (xiv)      Absence of Labor Disputes...................................................9
                  (xv)       Absence of Proceedings......................................................9
                  (xvi)      Accuracy of Exhibits.......................................................10
                  (xvii)     Possession of Intellectual Property........................................10
                  (xviii)    Absence of Further Requirements............................................10
                  (xix)      Possession of Licenses and Permits.........................................11
                  (xx)       Licensing and Accreditation of Laboratories................................11
                  (xxi)      Title to Property..........................................................11
                  (xxii)     Insurance..................................................................12
                  (xxiii)    Solvency...................................................................12
                  (xxiv)     Stabilization or Manipulation..............................................12
                  (xxv)      Environmental Laws.........................................................12
                  (xxvi)     Registration Rights........................................................13
                  (xxvii)    Accounting Controls........................................................13
                  (xxviii)   Investment Company Act.....................................................13
          (b)      Officer's Certificates...............................................................13

SECTION 2.        Sale and Delivery to Underwriters; Closing............................................14

         (a)      Securities and Guarantees.............................................................14

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         (b)      Payment...............................................................................14
         (c)      Denominations; Registration...........................................................14

SECTION 3.        Covenants of the Company and the Guarantors...........................................14

         (a)      Compliance with Securities Regulations and Commission Requests........................14
         (b)      Filing of Amendments..................................................................15
         (c)      Delivery of Registration Statements...................................................15
         (d)      Delivery of Prospectuses..............................................................15
         (e)      Continued Compliance with Securities Laws.............................................16
         (f)      Blue Sky Qualifications...............................................................16
         (g)      Rule 158..............................................................................16
         (h)      Use of Proceeds.......................................................................16
         (i)      Restriction on Sale of Securities.....................................................16
         (j)      Reporting Requirements................................................................17
         (k)      Interim Financial Statements..........................................................17
         (l)      Rating of Securities..................................................................17
         (m)      DTC Clearance.........................................................................17
         (n)      Refinancing Documents.................................................................17

SECTION 4.        Payment of Expenses...................................................................17

         (a)      Expenses..............................................................................17
         (b)      Termination of Agreement..............................................................18

SECTION 5.        Conditions of Underwriters' Obligations...............................................18

         (a)      Effectiveness of Registration Statement...............................................18
         (b)      Opinion of Counsel for the Company....................................................18
         (c)      Opinion of Deputy General Counsel of the Company......................................19
         (d)      Opinion of Counsel for the Underwriters...............................................19
         (e)      Officers' Certificate.................................................................19
         (f)      Accountant's Comfort Letters and Consent..............................................19
         (g)      Bring-down Comfort Letters............................................................19
         (h)      No Objection..........................................................................20
         (i)      Maintenance of Rating.................................................................20
         (j)      New Credit Agreement..................................................................20
         (k)      Tender Offer..........................................................................20
         (l)      Additional Documents..................................................................20
         (k)      Termination of Agreement..............................................................20

SECTION 6.        Indemnification.......................................................................21

         (a)      Indemnification of the Underwriters...................................................21

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         (b)      Indemnification of Company, Guarantors, Directors and Officers........................22
         (c)      Actions against Parties; Notification.................................................22
         (d)      Settlement without Consent if Failure to Reimburse....................................23

SECTION 7.        Contribution..........................................................................23


SECTION 8.        Representations, Warranties and Agreements to Survive Delivery........................25


SECTION 9.        Termination of Agreement..............................................................25

         (a)      Termination; General..................................................................25
         (b)      Liabilities...........................................................................25

SECTION 10.       Default by One or More of the Underwriters............................................25


SECTION 11.  Default by the Company and the Guarantors..................................................26


SECTION 12.       Notices    ...........................................................................26


SECTION 13.       Parties    ...........................................................................26


SECTION 14.       Governing Law and Time................................................................27


SECTION 15.       Effect of Headings....................................................................27

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Schedule A-Underwriters
Schedule B-Pricing Information
Schedule C-Guarantors
Schedule D-Subsidiaries
Exhibit A-Form of Opinion of Shearman & Sterling

Exhibit B-Form of Opinion of Deputy General Counsel of the Company Exhibit C-Form of Comfort Letters

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QUEST DIAGNOSTICS INCORPORATED
(a Delaware corporation)

$275,000,000 6 3/4% Senior Notes due 2006
$275,000,000 7 1/2% Senior Notes due 2011

PURCHASE AGREEMENT

June 20, 2001

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
Incorporated
Credit Suisse First Boston Corporation
Banc of America Securities LLC
UBS Warburg LLC
Wachovia Securities, Inc.
BNY Capital Markets, Inc.
as Representatives of the several Underwriters c/o Merrill Lynch & Co.
Merrill Lynch, Pierce, Fenner & Smith
Incorporated
North Tower
World Financial Center
New York, New York 10281-1209

Ladies and Gentlemen:

Quest Diagnostics Incorporated, a Delaware corporation (the "Company"), and each of the Guarantors listed on Schedule C hereto (the "Guarantors"), confirm their respective agreements with Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch") and Credit Suisse First Boston Corporation ("CSFB," together with Merrill Lynch, the "Joint Book-Running Managers") and each of the other Underwriters named in Schedule A hereto (collectively, the "Underwriters," which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof), for whom Merrill Lynch, CSFB, Banc of America Securities LLC, UBS Warburg LLC, Wachovia Securities, Inc. and BNY Capital Markets, Inc. are acting as representatives (in such capacity, the "Representatives"), with respect to (i) the issue and sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of the respective principal amounts set forth in said Schedule B of $275,000,000 aggregate principal amount of the Company's 6 3/4% Senior Notes due 2006 and $275,000,000 aggregate principal amount of the Company's 7 1/2% Senior Notes due 2011 (collectively, the "Securities") and (ii) the issue and sale by the Guarantors and the purchase by the Underwriters, acting severally and not jointly, of the senior guarantees (the "Guarantees") of the Company's obligations under the Securities. The

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Securities and the Guarantees are to be issued pursuant to an indenture dated as of June 27, 2001 (the "Base Indenture") among the Company, the Guarantors and Bank of New York, as trustee (the "Trustee"), as supplemented by the First Supplemental Indenture, to be dated as of June 27, 2001, among the Company, the Guarantors and the Trustee (the "First Supplemental Indenture"), establishing the form and terms of the Securities (collectively with the Base Indenture, the "Indenture").

The Securities and the Guarantees are being issued as part of a refinancing to repay all of the Company's outstanding indebtedness under the Credit Agreement dated as of August 16, 1999 among the Company and the lenders as parties thereto (the "Existing Credit Agreement") and to effect a tender offer to the holders of the Company's 10 3/4% Senior Subordinated Notes due 2006 (the "Tender Offer"). The Tender Offer will be effected as set forth in the Offer to Purchase dated May 24, 2001 (the "Offer to Purchase"). Previous to or simultaneous with the Closing Time as defined below, the Company intends to repay all of the indebtedness outstanding under the Existing Credit Agreement and to terminate the obligations of the Company and the guarantors thereunder.

The Company has received commitments from Merrill Lynch Capital Corporation, Credit Suisse First Boston Corporation, New York Branch ("CSFB NY"), Bank of America, N.A. ("Bank of America"), UBS AG, Stamford Branch, The Bank of New York ("BONY"), Wachovia Bank, N.A. ("Wachovia") and others (the "Lenders") to provide the Company with $650 million in senior unsecured credit facilities pursuant to a Credit Agreement (the "New Credit Agreement"), to be entered into simultaneously with the closing of the issuance of the Securities and the Guarantees at the Closing Time by the Company, the Guarantors, certain banks which are signatories thereto (the "Banks") and Banc of America Securities LLC and UBS Warburg LLC ("UBS Warburg") as co-lead arrangers and joint-book managers, Bank of America as administrative agent, CSFB NY and BONY as co-documentation agents, Merrill Lynch Capital Corporation and UBS Warburg as co-syndication agents and Wachovia as managing agent. The New Credit Agreement, the Tender Offer and all other documents and instruments executed in connection with or pursuant to any of the foregoing are collectively referred to herein as the "Refinancing Documents." The borrowings pursuant to the New Credit Agreement and the Tender Offer are collectively referred to herein as the "Refinancing Transactions."

The Company understands that the Underwriters propose to make a public offering of the Securities and the Guarantees as soon as the Representatives deem advisable after this Agreement has been executed and delivered.

The Company has filed with the Securities and Exchange Commission (the "Commission") a registration statement on Form S-3 (No. 333-54310) covering the registration of the Securities and the Guarantees under the Securities Act of 1933, as amended (the "1933 Act"), and the offering thereof from time to time in accordance with Rule 415 of the rules and regulations of the Commission under the 1933 Act (the "1933 Act Regulations"). Such registration statement was declared effective by the Commission on June 1, 2001 and the Indenture has been duly qualified under the Trust Indenture Act of 1939, as amended (the "1939 Act"). Promptly after execution and delivery of this Agreement, the Company will either (i) prepare and file a final prospectus and final prospectus supplement in accordance with the provisions of paragraph (b) of Rule 424 of the rules

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and regulations of the Commission or (ii) if the Company has elected to rely upon Rule 434 of the 1933 Act Regulations, prepare and file a term sheet or abbreviated term sheet (the "Term Sheet") in accordance with the provisions of Rule 434 and Rule 424(b). The aforementioned registration statement (as amended from time to time), including the exhibits thereto, schedules thereto, if any, and the documents incorporated by reference therein, including the information, if any, deemed to be a part thereof pursuant to Rule 430A of the 1933 Act Regulations (the "Rule 430A Information") or Rule 434 of the 1933 Act Regulations (the "Rule 434 Information"), is referred to herein as the "Registration Statement;" and the final prospectus and the final prospectus supplement relating to the offering of the Securities and the Guarantees, in the form furnished to the Underwriters by the Company for use in connection with the offering of the Securities and the Guarantees, are collectively referred to herein as the "Prospectus;" provided, however, that all references to the "Registration Statement" and the "Prospectus" shall also be deemed to include all documents incorporated therein by reference pursuant to the Securities Exchange Act of 1934, as amended (the "1934 Act"), prior to the execution of this Agreement. Any registration statement filed pursuant to Rule 462(b) of the 1933 Act Regulations is herein referred to as the "Rule 462(b) Registration Statement," and after such filing the term "Registration Statement" shall include the Rule 462(b) Registration Statement. If the Company elects to rely upon Rule 434 of the 1933 Act Regulations, then all references to the "Prospectus" shall also be deemed to include the final or preliminary prospectus and the applicable Term Sheet in the form first furnished to the Underwriters by the Company in reliance upon Rule 434 of the 1933 Act Regulations, and all references in this Agreement to the date of the Prospectus shall mean the date of the Term Sheet. A "preliminary prospectus" shall be deemed to refer to any prospectus and any amendment or supplement thereto that omitted, as applicable, the Rule 430A Information, the Rule 434 Information or other information to be included upon pricing in a form of prospectus filed with the Commission pursuant to Rule 424(b) of the 1933 Act Regulations and was used after the effectiveness of the Registration Statement and prior to the execution and delivery of this Agreement. For purposes of this Agreement, all references to the Registration Statement, any preliminary prospectus, the Prospectus or any Term Sheet or any amendment or supplement to any of the foregoing shall be deemed to include any copy filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval system ("EDGAR").

All references in this Agreement to financial statements and schedules and other information which is "contained," "included" or "stated" (or other references of like import) in the Registration Statement, any preliminary prospectus or the Prospectus or any amendment or supplement thereto shall be deemed to mean and include all such financial statements and schedules and other information which is incorporated by reference in the Registration Statement, any preliminary prospectus or the Prospectus or any amendment or supplement thereto, as the case may be; and all references in this Agreement to amendments or supplements to the Registration Statement, any preliminary prospectus or the Prospectus shall be deemed to mean and include the filing of any document under the 1934 Act which is incorporated by reference in the Registration Statement, such preliminary prospectus or the Prospectus, as the case may be.

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SECTION 1. Representations and Warranties.

(a) Representations and Warranties by the Company and the Guarantors. The Company and each of the Guarantors, jointly and severally, represent and warrant to each Underwriter as of the date hereof and as of the Closing Time referred to in Section 2(b) hereof, and agree with each Underwriter, as follows:

(i) Compliance with Registration Requirements. The Company meets the requirements for use of Form S-3 under the 1933 Act. Each of the Registration Statement and any Rule 462(b) Registration Statement has become effective under the 1933 Act and no stop order suspending the effectiveness of the Registration Statement or any Rule 462(b) Registration Statement has been issued under the 1933 Act and no proceedings for that purpose have been instituted or are pending or, to the knowledge of the Company, are contemplated by the Commission, and any request on the part of the Commission for additional information has been complied with. The Indenture has been duly qualified under the 1939 Act. All of the Guarantors are registrants under the Registration Statement.

At the respective times the Registration Statement, any Rule
462(b) Registration Statement and any post-effective amendments thereto became effective and at the Closing Time, the Registration Statement, the Rule 462(b) Registration Statement and any amendments and supplements thereto complied and will comply in all material respects with the requirements of the 1933 Act and the 1933 Act Regulations and did not and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading. Neither the Prospectus nor any amendments or supplements thereto, at the time the Prospectus or any such amendment or supplement was issued and at the Closing Time, included or will include an untrue statement of a material fact or omitted or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. If Rule 434 is used, the Company will comply with the requirements of Rule 434. The representations and warranties in this subsection shall not apply to statements in or omissions from the Registration Statement or Prospectus made in reliance upon and in conformity with information furnished to the Company in writing by any Underwriter through the Joint Book-Running Managers expressly for use in the Registration Statement or Prospectus.

Each preliminary prospectus and the prospectus filed as part of the Registration Statement as originally filed or as part of any amendment thereto, or filed pursuant to Rule 424 under the 1933 Act, complied when so filed in all material respects with the 1933 Act Regulations and each preliminary prospectus and the Prospectus delivered to the Underwriters for use in connection with this offering was identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(ii) Incorporated Documents. The documents incorporated or deemed to be incorporated by reference in the Registration Statement and the Prospectus, at the time they

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were or hereafter are filed with the Commission, complied and will comply in all material respects with the requirements of the 1934 Act and the rules and regulations of the Commission thereunder (the "1934 Act Regulations"), and, when read together with the other information in the Prospectus, at the time the Registration Statement became effective, at the time the Prospectus was issued and at the Closing Time, did not and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading.

(iii) Independent Accountants. The accountants who certified the audited financial statements and supporting schedule included in the Registration Statement are independent public accountants as required by the 1933 Act, the 1933 Act Regulations, the 1934 Act and the 1934 Act Regulations.

(iv) Financial Statements. The financial statements (other than the pro forma financial statements) included or incorporated by reference in the Registration Statement and the Prospectus, together with the related schedule and notes, present fairly (A) the financial position of the Company and its Subsidiaries (as defined below) on a consolidated basis and SmithKline Beecham Clinical Laboratories, Inc. and certain related affiliates, respectively, at the dates indicated and (B) the statements of operations, stockholders' equity and cash flows of the Company and its Subsidiaries on a consolidated basis and of SmithKline Beecham Clinical Laboratories, Inc. and certain related affiliates on a consolidated basis, respectively, for the periods specified. Such financial statements have been prepared in conformity with accounting principles generally accepted in the United States ("GAAP") applied on a consistent basis throughout the periods involved. The supporting schedules, if any, included in the Registration Statement present fairly in accordance with GAAP the information required to be stated therein. The selected financial data and the summary financial information included in the Prospectus present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included in the Registration Statement. The pro forma or as adjusted information included or incorporated by reference in the Registration Statement and the Prospectus present fairly the information shown therein, have been prepared in accordance with the Commission's rules and guidelines with respect to pro forma financial information and have been properly compiled on the basis described therein, and the assumptions used in the preparation thereof are reasonable and the adjustments used therein are appropriate to give effect to the transactions and circumstances referred to therein. There are no historical or pro forma financial statements which are required by the 1933 Act, the 1933 Act Regulations and Regulation S-X to be included in the Registration Statement and the Prospectus which are not included as required. The financial information regarding the Guarantors included or incorporated by reference in the Registration Statement and the Prospectus complies with the requirements of Rule 3-10 of Regulation S-X.

(v) No Material Adverse Change in Business. Since the respective dates as of which information is given in the Registration Statement and the Prospectus, except as otherwise stated therein or contemplated thereby, (A) there has been no material adverse change in the business, financial condition, operations, cash flow or business prospects of

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the Company and its Subsidiaries, considered as one enterprise, whether or not arising in the ordinary course of business (a "Material Adverse Effect"), (B) there have been no transactions entered into by the Company or any of its Subsidiaries, other than those described or contemplated by the Registration Statement and the Prospectus or in the ordinary course of business, which are material with respect to the Company and its Subsidiaries considered as one enterprise, and (C) other than the two-for-one stock split effected by the Company on May 31, 2001, there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock except for the payment of dividends on the Company's voting cumulative preferred stock.

(vi) Good Standing of the Company. The Company has been duly organized and is validly existing as a corporation in good standing under the laws of the State of Delaware and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus and to enter into and perform its obligations under this Agreement, the Indenture, the Securities, the Guarantees and each of the Refinancing Documents; and the Company is duly qualified as a foreign corporation to transact business and is in good standing in each other jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not result in a Material Adverse Effect.

(vii) Good Standing of Subsidiaries. Each subsidiary of the Company (each a "Subsidiary" and collectively the "Subsidiaries") has been duly organized and is validly existing as a corporation, partnership or limited liability company, as the case may be, in good standing under the laws of the jurisdiction of its incorporation or existence, has corporate or partnership power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus and is duly qualified as a foreign corporation or partnership to transact business and is in good standing in each jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not result in a Material Adverse Effect. Except as otherwise disclosed in the Prospectus, all of the outstanding capital stock or partnership interests of each Subsidiary have been duly authorized and validly issued or created, are fully paid and non-assessable and except as described in Schedule D are owned by the Company, directly or through the Subsidiaries, free and clear of any security interest, mortgage, pledge, lien, encumbrance, claim or equity except for pledges of such capital stock and partnership interests that were granted under the Existing Credit Agreement (that will be released upon repayment) and that will be granted under the New Credit Agreement as described in the Prospectus; none of the outstanding shares of capital stock or partnership interests of the Subsidiaries was issued in violation of any preemptive or similar rights arising by operation of law, or under the charter, by-laws or other charter documents of any Subsidiary or under any agreement to which the Company or any Subsidiary is a party. All of the Subsidiaries of the Company are listed on Schedule D attached hereto.

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(viii) Authorization of Agreement. This Agreement has been duly authorized, executed and delivered by the Company and each of the Guarantors.

(ix) Authorization and Description of the Indenture. The Base Indenture has been duly authorized, executed and delivered by the Company and each of the Guarantors and is duly qualified under the 1939 Act and constitutes a valid and binding agreement of the Company and each of the Guarantors, enforceable against the Company and each of the Guarantors in accordance with its terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of creditors' rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law). The First Supplemental Indenture has been duly authorized by the Company and each of the Guarantors and, when duly executed and delivered by the Company and each of the Guarantors, will constitute a valid and binding agreement of the Company and each of the Guarantors, enforceable against the Company and each of the Guarantors in accordance with its terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of creditors' rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law). The Indenture will conform in all material respects to the statements relating thereto contained in the Prospectus.

(x) Authorization and Description of Securities and Guarantees. The Securities to be purchased by the Underwriters from the Company have been duly authorized for issuance and sale to the Underwriters pursuant to this Agreement and, at the Closing Time, will have been duly executed by the Company and, when authenticated, issued and delivered in the manner provided for in the Indenture and delivered against payment of the purchase price therefor as provided in this Agreement, will constitute valid and binding obligations of the Company, enforceable against the Company in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of creditors' rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), and will be in the form contemplated by, and entitled to the benefits of, the Indenture. The Guarantees have been duly authorized by the Guarantors and, when executed and delivered in the manner provided for in the Indenture, will constitute valid and binding obligations of the Guarantors, enforceable against the Guarantors in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of creditors' rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), and will be in the form contemplated by, and entitled to the benefits of, the Indenture. The

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Securities and the Guarantees will conform in all material respects to the statements relating thereto contained in the Prospectus.

(xi) Authorization and Description of the Refinancing Transactions. Each of the Company and its Subsidiaries have all necessary corporate power and authority to enter into, to perform the obligations to be performed by them under, and to consummate the transactions contemplated by the Refinancing Transactions and the Refinancing Documents to which it is a party. The New Credit Agreement has been duly authorized by the Company and each of the Guarantors, and as of the Closing Time, will have been duly executed and delivered by the Company and each of the Guarantors, and will constitute the valid and binding obligation of the Company and the Guarantors, enforceable against the Company and the Guarantors in accordance with its terms except as the enforceability thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or other similar laws affecting creditors' rights generally, or the enforcement thereof is subject to principles of equity (regardless of whether enforcement is considered in a proceeding in equity or in law). All actions and proceedings required by law to be taken by the Company and the Subsidiaries prior to the Closing Time in connection with the Refinancing Transactions have been or prior to the Closing Time will have been duly and validly taken. The Refinancing Documents will conform in all material respects to the statements relating thereto contained in the Prospectus. The Underwriters have received copies of the most recently circulated draft of the New Credit Agreement as currently negotiated on the date hereof.

(xii) Non-Guarantor Subsidiaries. Each Subsidiary that is a guarantor under the New Credit Agreement is a Guarantor. All Subsidiaries that are not Guarantors (other than Quest Diagnostics Receivables Incorporated) did not collectively (a) own more than 10% of the Company's consolidated assets at December 31, 2000 or (b) account for more than 5% of the Company's consolidated revenues for the year ended December 31, 2000.

(xiii) Absence of Defaults and Conflicts. Neither the Company nor any of the Subsidiaries is in violation of its charter or by-laws or in default in the performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease or other agreement or instrument to which the Company or any of the Subsidiaries is a party or by which any of them may be bound, or to which any of the property or assets of the Company or any of the Subsidiaries is subject (collectively, "Agreements and Instruments") or has violated or is in violation of any of the laws, rules and regulations administered by the United States Health Care Financing Administration (the "HCFA"), the United States Food and Drug Administration (the "FDA"), the Substance Abuse and Mental Health Services Administration (the "SAMHSA") and by the Drug Enforcement Administration (the "DEA"), or any other applicable law, statute, rule, regulation, judgment, order, writ or decree of any government, government instrumentality or court, domestic or foreign, having jurisdiction over the Company or any of the Subsidiaries or any of their assets or properties, except in each case for such defaults or violations that have been disclosed or that would not singly or in the aggregate result in a Material Adverse Effect. Assuming the repayment and

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termination of the Company's and the Guarantors' obligations under the Existing Credit Agreement, the execution, delivery and performance of this Agreement, the Indenture, the Securities, the Guarantees, each of the Refinancing Documents and any other agreement or instrument entered into or issued or to be entered into or issued by the Company or any of the Guarantors in connection with the consummation of the transactions contemplated by the Refinancing Transactions and this Agreement and in the Registration Statement and the Prospectus (including each of the Refinancing Transactions, the issuance and sale of the Securities and the Guarantees, the use of the proceeds from the sale of the Securities and the Guarantees as described in the Prospectus under the caption "Use of Proceeds") and compliance by the Company and the Guarantors with their respective obligations under this Agreement, the Indenture, the Securities, the Guarantees and each of the Refinancing Documents have been duly authorized by all necessary corporate action and do not and will not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or a default or a Repayment Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of the Subsidiaries pursuant to, the Agreements and Instruments (except for such conflicts, breaches or defaults or liens, charges or encumbrances that, singly or in the aggregate, would not result in a Material Adverse Effect), nor will such action result in any violation of the provisions of the charter or by-laws of the Company or any of the Subsidiaries or any applicable law, statute, rule, regulation, judgment, order, writ or decree of any government, government instrumentality or court, domestic or foreign, having jurisdiction over the Company or any of the Subsidiaries or any of their assets, properties or operations. As used herein, a "Repayment Event" means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder's behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any of the Subsidiaries.

(xiv) Absence of Labor Disputes. No labor dispute with the employees of the Company or any of the Subsidiaries exists or, to the knowledge of the Company and the Guarantors, is imminent, which may reasonably be expected to result in a Material Adverse Effect.

(xv) Absence of Proceedings. Except as disclosed in the Prospectus there is not pending or, to the knowledge of the Company or any Guarantor, threatened any action, suit, proceeding, inquiry or investigation, to which the Company or any Subsidiary is a party, or to which the property of the Company or any Subsidiary is subject, before or brought by any domestic or foreign court or governmental agency or body, affecting (i) the possession by any of them of any Governmental License (as defined herein) currently held by any them, (ii) the accreditation of any of their respective laboratories with the College of American Pathologists ("CAP"), (iii) any of their qualification to perform services for and receive reimbursement from, Medicaid or Medicare, (iv) any of their ability to conduct their clinical testing business in any state or (v) any of them in any other way, which in the case of any of the foregoing, might reasonably be expected to result in a Material Adverse Effect, or which might reasonably be expected to materially and adversely affect the properties or assets of the Company and the Subsidiaries considered as one enterprise or the consummation of the

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transactions contemplated in this Agreement or the performance by the Company of its obligations hereunder or under the Indenture, Securities, Guarantees or Refinancing Transactions. The aggregate of all pending legal or governmental proceedings to which the Company or any Subsidiary thereof is a party or of which any of their respective property or assets is the subject which are not described in the Prospectus, including ordinary routine litigation incidental to the business, could not reasonably be expected to result in a Material Adverse Effect. All of the descriptions set forth in the Prospectus of the legal and governmental proceedings by or before any court, governmental agency or body are true and accurate in all material respects.

(xvi) Accuracy of Exhibits. There are no contracts or documents which are required to be described in the Registration Statement, the Prospectuses or the documents incorporated by reference therein or to be filed as exhibits thereto which have not been so described and filed as required.

(xvii) Possession of Intellectual Property. The Company and the Subsidiaries own, possess or license, or can acquire on reasonable terms, adequate patents, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks, trade names or other intellectual property (collectively, "Intellectual Property") necessary to carry on the business now operated by them, and neither the Company nor any of the Subsidiaries has received any notice or is otherwise aware of any infringement of or conflict with asserted rights of others with respect to any Intellectual Property (including Intellectual Property which is licensed) or of any facts or circumstances which would render any Intellectual Property invalid or inadequate to protect the interest of the Company or any of the Subsidiaries therein, and which infringement or conflict or invalidity or inadequacy, singly or in the aggregate, would reasonably be expected to result in a Material Adverse Effect.

(xviii) Absence of Further Requirements. No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of, any court or governmental authority or agency is necessary or required (i) for the performance by the Company or any of the Guarantors of their respective obligations hereunder or under any of the Refinancing Documents, (ii) in connection with the offering, issuance or sale of the Securities and the Guarantees under this Agreement or the consummation of the transactions contemplated by this Agreement or by each of the Refinancing Transactions or (iii) for the due execution, delivery or performance by the Company or any of the Guarantors of this Agreement, the Indenture, the Securities, the Guarantees, each of the Refinancing Documents or any other agreement or instrument entered into or issued or to be entered into or issued by the Company or any of the Subsidiaries in connection with the consummation of the Refinancing Transactions, the transactions contemplated herein and in the Registration Statement and the Prospectus (including the issuance and sale of the Securities and the use of proceeds from the sale of the Securities as described in the Registration Statement under the caption "Use of Proceeds"), except such as have been already obtained or as may be required under the 1933 Act or the 1933 Act Regulations or state securities

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laws and except such where the failure to obtain would not result in a Material Adverse Effect.

(xix) Possession of Licenses and Permits. The Company and the Subsidiaries possess all governmental permits, licenses, approvals, consents, certificates and other authorizations required (i) under the federal Medicare program, (ii) under the Clinical Laboratories Improvement Act of 1967, as amended (the "CLIA"), (iii) by the SAMHSA and (iv) as otherwise necessary to conduct the business now operated by them respectively, issued by the HCFA, the FDA, the SAMHSA and each other appropriate federal, state, local or foreign regulatory agencies or bodies including, but not limited to, any foreign regulatory authorities performing functions similar to their respective functions ("Governmental Licenses") except where failure to obtain such Governmental Licenses would not singly or in the aggregate, result in a Material Adverse Effect; the Company and the Subsidiaries are in compliance with the terms and conditions of all such Governmental Licenses and with the rules and regulations of the regulatory authorities and governing bodies having jurisdiction with respect thereto, except where the failure so to comply would not, singly or in the aggregate, have a Material Adverse Effect; all of the Governmental Licenses are valid and in full force and effect, except when the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not have a Material Adverse Effect; and neither the Company nor any of the Subsidiaries has received any notice of proceedings relating to the revocation or modification of any such Governmental Licenses, nor are there, to the knowledge of the Company or any Guarantor, pending or threatened actions, suits, claims or proceedings against the Company or any Subsidiary before any court, governmental agency or body including, but not limited to, the HCFA, the FDA, and the SAMHSA or otherwise that would reasonably be expected to limit, revoke, cancel, suspend or cause not to be renewed any Governmental License, in each case, which, singly or in the aggregate, would result in a Material Adverse Effect.

(xx) Licensing and Accreditation of Laboratories. All of the regional laboratories of the Company and the Subsidiaries are eligible for accreditation by CAP and are so accredited, and all of the laboratories of the Company and the Subsidiaries are in compliance, in all material respects, with the standards required by CLIA.

(xxi) Title to Property. The Company and the Subsidiaries have valid title to all real property owned by the Company and the Subsidiaries and good title to all other properties owned by them, in each case, free and clear of all mortgages, pledges, liens, security interests, claims, restrictions or encumbrances of any kind except such as (a) are described in the Prospectus and reflected in the financial statements included therein; (b) are granted or created under the Existing Credit Agreement and that will be granted or created under the New Credit Agreement or (c) do not, singly or in the aggregate, materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company or any of the Subsidiaries; and all of the leases and subleases material to the business of the Company and the Subsidiaries, considered as one enterprise, and under which the Company or any of the Subsidiaries holds properties described in the Prospectus, are in full force and effect. Except as described in the

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Prospectus, neither the Company nor any of the Subsidiaries has any notice of any claim of any sort that has been asserted by anyone adverse to the rights of the Company or any of the Subsidiaries under any of the leases or subleases mentioned above, or affecting or questioning the rights of the Company or any Subsidiary to the continued possession of the leased or subleased premises under any such lease or sublease, which, singly or in the aggregate, would result in a Material Adverse Effect.

(xxii) Insurance. The Company and the Subsidiaries carry or are entitled to the benefits of insurance, including, without limitation, professional liability insurance, with financially sound and reputable insurers, in such amounts, containing such deductibles and covering such risks as is reasonable and prudent.

(xxiii) Solvency. The Company and each of the Guarantors are, and immediately after the Closing will be, Solvent. As used herein, the term "Solvent" means, with respect to the Company and each Guarantor, as the case may be, on a particular date, that on such date (A) the fair market value of the assets of the Company or such Guarantor is greater than the total amount of liabilities (including, without limitation, contingent liabilities) of the Company or such Guarantor, (B) the present fair salable value of the assets of the Company or such Guarantor is not less than the amount that will be required to pay the probable liability of the Company or such Guarantor on its debts as they become absolute and matured, (C) the Company or such Guarantor does not intend to, and does not believe that it will, incur debts and liabilities beyond the Company's or such Guarantor's ability to pay as such debts and liabilities mature, (D) the Company or such Guarantor is not engaged in a business or a transaction, and is not about to engage in a business or a transaction, for which the Company's or such Guarantor's assets would constitute unreasonably small capital.

(xxiv) Stabilization or Manipulation. Neither the Company nor any Guarantor nor any of their respective officers, directors or controlling persons has taken, directly or indirectly, any action designed to cause or to result in, or that has constituted or which might reasonably be expected to constitute, the stabilization or manipulation of the price of any security of the Company or any Guarantor in order to facilitate the sale or resale of the Securities or the Guarantees. The Company and the Guarantors have not distributed and, prior to the later to occur of (i) the Closing Time and (ii) completion of the distribution of the Securities and the Guarantees, will not distribute any offering material in connection with the offering and sale of the Securities and the Guarantees other than the Prospectus or other materials, if any, permitted by the 1933 Act and approved by the Representatives.

(xxv) Environmental Laws. Except for such matters as would not, singly or in the aggregate, result in a Material Adverse Effect, (A) neither the Company nor any of the Subsidiaries is in violation of any federal, state, local or foreign statute, law, rule, regulation, ordinance, code, policy or rule of common law or any judicial or administrative interpretation thereof, including any judicial or administrative order, consent, decree or judgment, relating to pollution or protection of human health, the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including, without limitation, laws and regulations relating to the release

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or threatened release of chemicals, pollutants, contaminants, wastes, toxic substances, hazardous substances, medical specimens, petroleum or petroleum products or nuclear or radioactive material (collectively, "Hazardous Materials") or to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials (collectively, "Environmental Laws"), (B) the Company and the Subsidiaries have all permits, licenses, authorizations and approvals currently required for their respective businesses under any applicable Environmental Laws and are each in compliance with their requirements,
(C) there are no pending or threatened administrative, regulatory or judicial actions, suits, demands, demand letters, claims, liens, notices of noncompliance or violation, investigation or proceedings relating to any Environmental Law against the Company or any of the Subsidiaries and (D) there are no events, facts or circumstances that might reasonably be expected to form the basis of any liability or obligation of the Company or any of the Subsidiaries, including, without limitation, any order, decree, plan or agreement requiring clean-up or remediation, or any action, suit or proceeding by any private party or governmental body or agency, against or affecting the Company or any of the Subsidiaries relating to any Hazardous Materials or Environmental Laws.

(xxvi) Registration Rights. Except as disclosed in the Prospectus, there are no holders of securities (debt or equity) of the Company, or holders of rights (including, without limitation, preemptive rights), warrants or options to obtain securities of the Company, who in connection with the issuance, sale and delivery of the Securities and the Guarantees, and the execution, delivery and performance of this Agreement, have the right to request the Company to register securities held by them under the 1933 Act.

(xxvii) Accounting Controls. The Company and its consolidated Subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurances that (A) transactions are executed in accordance with management's general or specific authorization; (B) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain accountability for assets; (C) access to assets is permitted only in accordance with management's general or specific authorization; and (D) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(xxviii) Investment Company Act. The Company and each of the Guarantors are not, and will not be as a result of the sale of the Securities and the Guarantees pursuant to this Agreement, an investment company within the meaning of the Investment Company Act of 1940, as amended.

(b) Officer's Certificates. Any certificate signed by any officer of the Company or any of its subsidiaries, as the case may be, delivered to the Representatives or to counsel for the Underwriters shall be deemed a representation and warranty by the Company or any of the Subsidiaries to each Underwriter as to the matters covered thereby.

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SECTION 2. Sale and Delivery to Underwriters; Closing.

(a) Securities and Guarantees. On the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company and the Guarantors agree to sell to each Underwriter, severally and not jointly, and each Underwriter, severally and not jointly, agrees to purchase from the Company, at the prices set forth in Schedule B, the aggregate principal amount of Securities (including the Guarantees) set forth in Schedule A opposite the name of such Underwriter, plus any additional principal amount of Securities (including the Guarantees) which such Underwriter may become obligated to purchase pursuant to the provisions of Section 10 hereof.

(b) Payment. Payment of the purchase price for, and delivery of certificates for, the Securities shall be made at the offices of Shearman & Sterling, 599 Lexington Avenue, New York, New York 10022, or at such other place as shall be agreed upon by the Representatives, the Company and the Guarantors at 9:00 A.M. (New York Time) on June , 2001 (unless postponed in accordance with the provisions of Section 10), or such other time not later than ten business days after such date as shall be agreed upon by the Representatives, the Company and the Guarantors (such time and date of payment and delivery being herein called the "Closing Time").

Payment shall be made to the Company and the Guarantors by wire transfer of immediately available funds to bank accounts designated by the Company against delivery to the Representatives for the respective accounts of the Underwriters of certificates for the Securities and the Guarantees to be purchased by them. It is understood that each Underwriter has authorized the Representatives, for its account, to accept delivery of, receipt for, and make payment of the purchase price for, the Securities and the Guarantees which it has agreed to purchase. Merrill Lynch, individually and not as representative of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Securities and the Guarantees to be purchased by any Underwriter whose funds have not been received by the Closing Time, but such payment shall not relieve such Underwriter from its obligations hereunder.

(c) Denominations; Registration. Certificates for the Securities (including the Guarantees), shall be in such denominations and registered in such names as the Representatives may request in writing at least one full business day before the Closing Time. The certificates for the Securities (including the Guarantees), will be made available for examination by the Representatives in The City of New York not later than 9:00 A.M. (New York Time) on the business day prior to the Closing Time.

SECTION 3. Covenants of the Company and the Guarantors. The Company and the Guarantors, jointly and severally, covenant with each Underwriter as follows:

(a) Compliance with Securities Regulations and Commission Requests. The Company and the Guarantors, subject to Section 3(b), will comply with the requirements of Rule 415, Rule 430A and/or Rule 434, as applicable, and will notify the Representatives immediately, and confirm the notice in writing, (i) when any post-effective amendment to the Registration Statement shall become effective, or any supplement to the Prospectus or any amended Prospectus shall have been filed, (ii) of the receipt of any comments from the Commission, (iii) of any request by the

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Commission for any amendment to the Registration Statement or any amendment or supplement to the Prospectus or for additional information, and (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or of any order preventing or suspending the use of any preliminary prospectus, or of the suspension of the qualification of the Securities and the Guarantees for offering or sale in any jurisdiction, or of the initiation or threatening of any proceedings for any of such purposes. The Company and the Guarantors will promptly effect the filings necessary pursuant to Rule 424(b) and will take such steps as they deem necessary to ascertain promptly whether the form of prospectus transmitted for filing under Rule 424(b) was received for filing by the Commission and, in the event that it was not, they will promptly file such prospectus. The Company and the Guarantors will make every reasonable effort to prevent the issuance of any stop order and, if any stop order is issued, to obtain the lifting thereof at the earliest possible moment.

(b) Filing of Amendments. The Company and the Guarantors will give the Representatives notice of their intention to file or prepare any amendment to the Registration Statement (including any filing under Rule 462(b)), any Term Sheet or any amendment, supplement or revision to either the prospectus included in the Registration Statement at the time it became effective or to the Prospectus, whether pursuant to the 1933 Act, the 1934 Act or otherwise, will furnish the Representatives with copies of any such documents a reasonable amount of time prior to such proposed filing or use, as the case may be, and will not file or use any such document to which the Representatives or counsel for the Underwriters shall object.

(c) Delivery of Registration Statements. The Company and the Guarantors have furnished or will deliver to the Representatives and counsel for the Underwriters, without charge, one copy of the manually signed and as many conformed copies as the Underwriters may reasonably request of the Registration Statement as originally filed and of each amendment thereto (including exhibits filed therewith or incorporated by reference therein and documents incorporated or deemed to be incorporated by reference therein) and signed copies of all consents and certificates of experts, and will also deliver to the Representatives, without charge, a conformed copy of the Registration Statement as originally filed and of each amendment thereto (without exhibits) for each of the Underwriters. The copies of the Registration Statement and each amendment thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(d) Delivery of Prospectuses. The Company and the Guarantors have delivered to each Underwriter, without charge, as many copies of each preliminary prospectus as such Underwriter reasonably requested, and the Company and the Guarantors hereby consent to the use of such copies for purposes permitted by the 1933 Act. The Company and the Guarantors will furnish to each Underwriter, without charge, during the period when the Prospectus is required to be delivered under the 1933 Act or the 1934 Act, such number of copies of the Prospectus (as amended or supplemented) as such Underwriter may reasonably request. The Prospectus and any amendments or supplements thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

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(e) Continued Compliance with Securities Laws. The Company and the Guarantors will comply with the 1933 Act and the 1933 Act Regulations and the 1934 Act and the 1934 Act Regulations so as to permit the completion of the distribution of the Securities and the Guarantees as contemplated in this Agreement and in the Prospectus. If at any time when a prospectus is required by the 1933 Act to be delivered in connection with sales of the Securities and the Guarantees, any event shall occur or condition shall exist as a result of which it is necessary, in the opinion of counsel for the Underwriters or for the Company and the Guarantors, to amend the Registration Statement or amend or supplement the Prospectus in order that the Prospectus will not include any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein not misleading in the light of the circumstances existing at the time it is delivered to a purchaser, or if it shall be necessary, in the opinion of such counsel, at any such time to amend the Registration Statement or amend or supplement the Prospectus in order to comply with the requirements of the 1933 Act or the 1933 Act Regulations, the Company and the Guarantors will promptly prepare and file with the Commission, subject to Section 3(b), such amendment or supplement as may be necessary to correct such statement or omission or to make the Registration Statement or the Prospectus comply with such requirements, and the Company and the Guarantors will furnish to the Underwriters such number of copies of such amendment or supplement as the Underwriters may reasonably request.

(f) Blue Sky Qualifications. The Company and the Guarantors will use their reasonable best efforts, in cooperation with the Underwriters, to qualify the Securities and the Guarantees for offering and sale under the applicable securities laws of such states and other jurisdictions (domestic or foreign) as the Representatives may designate and to maintain such qualifications in effect as long as required for the sale of the Securities and the Guarantees; provided, however, that the Company and the Guarantors shall not be obligated to file any general consent to service of process or to qualify as a foreign corporation or as a dealer in securities in any jurisdiction in which they are not so qualified or to subject themselves to taxation in respect of doing business in any jurisdiction in which it is not otherwise so subject.

(g) Rule 158. The Company and the Guarantors will timely file such reports pursuant to the 1934 Act as are necessary in order to make generally available to their securityholders as soon as practicable an earnings statement for the purposes of, and to provide the benefits contemplated by, the last paragraph of Section 11(a) of the 1933 Act.

(h) Use of Proceeds. The Company and the Guarantors will use the net proceeds received by them from the sale of the Securities and the Guarantees in the manner specified in the Prospectus under "Use of Proceeds".

(i) Restriction on Sale of Securities. Except as otherwise contemplated in the Prospectus, during the period commencing on the date of the Prospectus and ending at the Closing Time, the Company and the Guarantors will not, without the prior written consent of the Joint Book-Running Managers, (i) directly or indirectly, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise transfer or dispose of any debt securities or guarantees of debt securities of the Company or any Guarantor or any securities convertible into or exercisable or

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exchangeable for any debt securities or guarantees of debt securities of the Company or any Guarantor or file any registration statement under the 1933 Act with respect to any of the foregoing or (ii) enter into any swap or any other agreement or any transaction that transfers, in whole or in part, directly or indirectly, the economic consequence of ownership of any debt securities or guarantees of debt securities of the Company or any Guarantor, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of any debt securities or guarantees of debt securities of the Company or any Guarantor or such other securities, in cash or otherwise. The foregoing sentence shall not apply to the Securities and the Guarantees to be sold hereunder.

(j) Reporting Requirements. The Company, during the period when the Prospectus is required to be delivered under the 1933 Act or the 1934 Act, will file all documents required to be filed with the Commission pursuant to the 1934 Act within the time periods required by the 1934 Act and the 1934 Act Regulations.

(k) Interim Financial Statements. Prior to the Closing Time, the Company and the Guarantors shall furnish to the Representatives copies of any unaudited interim financial statements of the Company, promptly after they have been completed, for any periods subsequent to the periods covered by the financial statements appearing in the Prospectus.

(l) Rating of Securities. The Company and the Guarantors shall take all reasonable action necessary to enable Standard & Poor's Corporation ("S&P") and Moody's Investors Service, Inc. ("Moody's"), to provide their respective credit ratings of the Securities and the Guarantees.

(m) DTC Clearance. The Company and the Guarantors will use all reasonable efforts in cooperation with the Underwriters to permit the Securities and the Guarantees to be eligible for clearance and settlement through The Depository Trust Company ("DTC").

(n) Refinancing Documents. The Company will make available to the Underwriters drafts of all Refinancing Documents in substantially final form a reasonable period of time prior to the Closing Time and a complete set of closing documents and opinions in connection with the Refinancing Transactions a reasonable time after the consummation of the Refinancing Transactions.

SECTION 4. Payment of Expenses.

(a) Expenses. The Company and the Guarantors, jointly and severally, will pay all expenses incident to the performance of their respective obligations under this Agreement, including (i) the preparation, printing and any filing of the Registration Statement (including financial statements and any schedules or exhibits) and of each amendment or supplement thereto, including the preliminary prospectus and the prospectus to be contained in the Registration Statement, (ii) the preparation, printing and delivery to the Underwriters of this Agreement, any Agreement among Underwriters, the Indenture and such other documents as may be required in connection with the offering, purchase, sale and delivery of the Securities and the Guarantees, (iii) the preparation, issuance and delivery of the certificates for the Securities and the Guarantees to the Underwriters, (iv) the fees and disbursements of the Company's and the Guarantors' counsel, accountants and

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other advisors, (v) the qualification of the Securities and the Guarantees under securities laws in accordance with the provisions of Section 3(f) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriters in connection therewith and in connection with the preparation of the Blue Sky Survey and any supplement thereto, (vi) the printing and delivery to the Underwriters of copies of each preliminary prospectus, any Term Sheets and of the Prospectus and any amendments or supplements thereto, (vii) the preparation, printing and delivery to the Underwriters of copies of the Blue Sky Survey and any supplement thereto, (viii) the fees and expenses of the Trustee, including the fees and disbursements of counsel for the Trustee in connection with the Indenture, the Securities and the Guarantees, (ix) the filing fees incident to, and the reasonable fees and disbursements of counsel to the Underwriters in connection with, the review by the National Association of Securities Dealers, Inc. (the "NASD") of the terms of the sale of the Securities and the Guarantees, if any, and (x) any fees payable in connection with the rating of the Securities.

(b) Termination of Agreement. If this Agreement is terminated by the Representatives in accordance with the provisions of Section 5 or Section
9(a)(i), 9(a)(ii) or Section 11 hereof, the Company and the Guarantors, jointly and severally, shall reimburse the Underwriters for all of their out-of-pocket expenses, including the reasonable fees and disbursements of counsel for the Underwriters.

SECTION 5. Conditions of Underwriters' Obligations. The obligations of the several Underwriters hereunder are subject to the accuracy of the representations and warranties of the Company and the Guarantors contained in
Section 1 hereof or in certificates of any officer of the Company or any of the Subsidiaries delivered pursuant to the provisions hereof, to the performance by the Company and the Guarantors of their covenants and other obligations hereunder and to the following further conditions:

(a) Effectiveness of Registration Statement. The Registration Statement, including any Rule 462(b) Registration Statement, has become effective and at Closing Time no stop order suspending the effectiveness of the Registration Statement shall have been issued under the 1933 Act or proceedings therefor initiated or threatened by the Commission, and any request on the part of the Commission for additional information shall have been complied with to the reasonable satisfaction of counsel to the Underwriters. A prospectus containing the Rule 430A Information shall have been filed with the Commission in accordance with Rule 424(b) (or a post-effective amendment providing such information shall have been filed and declared effective in accordance with the requirements of Rule 430A) or, if the Company and the Guarantors have elected to rely upon Rule 434, a Term Sheet shall have been filed with the Commission in accordance with Rule 424(b).

(b) Opinion of Counsel for the Company. At Closing Time, the Representatives shall have received the favorable opinion, dated as of the Closing Time, of Shearman & Sterling, counsel for the Company, in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letters for each of the other Underwriters to the effect set forth in Exhibit A hereto.

- 18 -

(c) Opinion of Deputy General Counsel of the Company. At the Closing Time, the Representatives shall have received the favorable opinion, dated as of the Closing Time, of Leo C. Farrenkopf, Jr., Deputy General Counsel of the Company, in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letters for each of the other Underwriters to the effect set forth in Exhibit B hereto.

(d) Opinion of Counsel for the Underwriters. At Closing Time, the Representatives shall have received the favorable opinion, dated as of the Closing Time, of Fried, Frank, Harris, Shriver & Jacobson, counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters. In giving such opinion such counsel may rely, as to all matters governed by the laws of jurisdictions other than the law of the State of New York and the federal law of the United States and the General Corporation Law of the State of Delaware, upon the opinions of counsel satisfactory to the Representatives. Such counsel may also state that, insofar as such opinion involves factual matters, they have relied, to the extent they deem proper, upon certificates of officers of the Company and the Subsidiaries and certificates of public officials.

(e) Officers' Certificate. At the Closing Time, (i) the Prospectus, as it may then be amended or supplemented, including the documents incorporated by reference therein, shall not contain an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in light of the circumstances under which they were made, not misleading; (ii) there shall not have been, since the respective dates as of which information is given in the Prospectus, any material adverse change in the business, financial condition, operations, cash flow or business prospects of the Company and of the Subsidiaries, considered as one enterprise, whether or not arising in the ordinary course of business; (iii) the Company and the Guarantors shall have complied with all agreements and satisfied all conditions on their part to be performed or satisfied at or prior to the Closing Time; and (iv) the representations and warranties of the Company and the Guarantors in Section 1(a) shall be accurate and true and correct as though expressly made at and as of the Closing Time. The Representatives shall have received a certificate of Robert A. Hageman, Vice President and Chief Financial Officer of the Company and Joseph Manory, Vice President and Treasurer of the Company, dated as of Closing Time, to such effect and to the effect that no stop order suspending the effectiveness of the Registration Statement has been issued and no proceedings for that purpose have been instituted or are pending or are contemplated by the Commission.

(f) Accountant's Comfort Letters and Consent. At the time of the execution of this Agreement, the Representatives shall have received from PricewaterhouseCoopers LLP letters with respect to the Company and with respect to SmithKline Beecham Clinical Laboratories, Inc. dated such date, in form and substance satisfactory to the Representatives or to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters, containing statements and information of the type ordinarily included in accountants' "comfort letters" to Underwriters with respect to the financial statements and certain financial information contained in the Registration Statement.

(g) Bring-down Comfort Letters. At the Closing Time, the Representatives shall have received from PricewaterhouseCoopers LLP, letters dated as of the Closing Time, to the effect that they reaffirm the statements made in the letters furnished pursuant to subsection (f) of this Section,

- 19 -

except that the specified date referred to shall be a date not more than three business days prior to the Closing Time.

(h) No Objection. The NASD has not raised any objection with respect to the fairness and reasonableness of the underwriting terms and arrangements.

(i) Maintenance of Rating. At Closing Time, the Securities (including the Guarantees) shall be rated at least Ba1 by Moody's and BBB- by S&P, and the Company and the Guarantors shall have delivered to the Representatives a letter dated the Closing Time, from each such rating agency, or other evidence satisfactory to the Representatives, confirming that the Securities and the Guarantees have such ratings; and since the date of this Agreement, there shall not have occurred a downgrading in, or withdrawal of, the rating assigned to the Securities and the Guarantees or any of the Company's and the Guarantors' other debt securities or debt instruments by any "nationally recognized statistical rating agency," as that term is defined by the Commission for purposes of Rule 436(g)(2) under the 1933 Act, and no such organization shall have publicly announced that it has under surveillance or review its rating of the Securities and the Guarantees or any of the Company's and the Guarantors' other debt securities or debt instruments.

(j) New Credit Agreement. At the Closing Time and upon consummation of the transactions contemplated hereby, (i) the Company and the Guarantors shall have duly authorized, executed and delivered the New Credit Agreement, (ii) there shall be no default or event of default under the New Credit Agreement or the existence of any event which with notice or lapse of time, or both, would constitute a default under the New Credit Agreement and (iii) the Company and the Guarantors shall have received all consents necessary to the issuance and sale of the Securities and the Guarantees and the consummation of the transactions contemplated hereby, in each case in a form and substance satisfactory to the Representatives and counsel for the Underwriters. At the Closing Time, all legal opinions delivered on behalf of the Company in connection with entering into the New Credit Agreement shall have been addressed and delivered to the Underwriters or shall state that the Underwriters may rely upon such opinions as if they were addressed and delivered to them.

(k) Tender Offer. At the Closing Time, the Company shall have received the Requisite Consents (as defined in the Offer to Purchase) and shall have not received any indication that the Tender Offer will not be consummated by the Payment Date (as defined in the Offer to Purchase).

(l) Additional Documents. At Closing Time counsel for the Underwriters shall have been furnished with such documents and opinions as they may reasonably require (including any consents under any agreements to which the Company is a party) for the purpose of enabling them to pass upon the issuance and sale of the Securities and the Guarantees as herein contemplated, or in order to evidence the accuracy of any of the representations or warranties, or the fulfillment of any of the conditions, herein contained; and all proceedings taken by the Company and the Guarantors in connection with the issuance and sale of the Securities and the Guarantees as herein contemplated shall be satisfactory in form and substance to the Representatives and counsel for the Underwriters.

(m) Termination of Agreement. If any condition specified in this
Section shall not have been fulfilled when and as required to be fulfilled, this Agreement may be terminated by the

- 20 -

Representatives by notice to the Company at any time at or prior to Closing Time, and such termination shall be without liability of any party to any other party except as provided in Section 4 and except that Sections 1, 6, 7 and 8 shall survive any such termination and remain in full force and effect.

SECTION 6. Indemnification.

(a) Indemnification of the Underwriters. The Company and each of the Guarantors, jointly and severally, agree to indemnify and hold harmless each Underwriter and each person, if any, who controls any Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act to the extent and in the manner set forth in clauses (i), (ii) and (iii) below, as follows:

(i) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, arising out of any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto) including the Rule 430A Information and the Rule 434 Information, if applicable, or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or arising out of any untrue statement or alleged untrue statement of a material fact included in any preliminary prospectus or the Prospectus (or any amendment or supplement thereto), or the omission or alleged omission therefrom of a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading;

(ii) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, to the extent of the aggregate amount paid in settlement of any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or of any claim whatsoever based upon any such untrue statement or omission, or any such alleged untrue statement or omission; provided that (subject to Section 6(d) below) any such settlement is effected with the written consent of the Company; and

(iii) against any and all expense whatsoever, as incurred (including the fees and disbursements of counsel chosen by the Joint Book-Running Managers), reasonably incurred in investigating, preparing or defending against any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever based upon any such untrue statement or omission, or any such alleged untrue statement or omission, to the extent that any such expense is not paid under (i) or (ii) above;

provided, however, that this indemnity agreement shall not apply to any loss, liability, claim, damage or expense to the extent arising out of any untrue statement or omission or alleged untrue statement or omission made in reliance upon and in conformity with written information furnished to the Company or the Guarantors by any Underwriter through the Joint Book-Running Managers expressly for use in the Registration Statement (or any amendment thereto), including the Rule 430A Information and Rule 434 Information, if applicable, or any preliminary prospectus or the Prospectus (or any amendment or supplement thereto); provided, further that the Company and the

- 21 -

Guarantors will not be liable to any Underwriter or any person controlling such Underwriter with respect to any such untrue statement or alleged untrue statement or omission or alleged omission made in any preliminary prospectus to the extent that the Company and the Guarantors shall sustain the burden of proving that any such loss, liability, claim, damage or expense resulted from the fact that the Underwriter sold Securities and Guarantees to a person to whom such Underwriter failed to send or give, at or prior to the written confirmation of the sale of such Securities and Guarantees, a copy of the Prospectus (as amended or supplemented) if the Company has previously furnished copies thereof to the Underwriter (sufficiently in advance of the Closing Time to allow for distribution of the Prospectus in a timely manner) and complied with their obligations hereunder and the loss, liability, claim, damage or expense of the Underwriter resulted from an untrue statement or omission or alleged untrue statement or omission of a material fact contained in or omitted from such preliminary prospectus (as amended or supplemented) which was corrected in the Prospectus (as amended or supplemented).

The indemnified parties shall, however, be relieved of their obligation to first demand payment from the Company and the Guarantors or to wait such 30 calendar days if (i) the Company files a petition for relief under the United States Bankruptcy Code (the "Bankruptcy Code"), (ii) an order for relief is entered against the Company in an involuntary case under the Bankruptcy Code, (iii) the Company makes an assignment for the benefit of its creditors, or (iv) any court orders or approves the appointment of a receiver or custodian for the Company or a substantial portion of its assets.

(b) Indemnification of Company, Guarantors, Directors and Officers. Each Underwriter severally agrees to indemnify and hold harmless the Company, the Guarantors, their directors, each of their officers who signed the Registration Statement, and each person, if any, who controls the Company or any Guarantor within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act against any and all loss, liability, claim, damage and expense described in the indemnity contained in subsection (a) of this Section, as incurred, but only with respect to untrue statements or omissions, or alleged untrue statements or omissions, made in the Registration Statement (or any amendment thereto), including the Rule 430A Information and the Rule 434 Information, if applicable, or any preliminary prospectus or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with written information furnished to the Company and the Guarantors by such Underwriter through the Joint Book-Running Managers expressly for use in the Registration Statement (or any amendment thereto).

(c) Actions against Parties; Notification. Each indemnified party shall give notice as promptly as reasonably practicable to each indemnifying party of any action commenced against it in respect of which indemnity may be sought hereunder, but failure to so notify an indemnifying party shall not relieve such indemnifying party from any liability hereunder to the extent it is not materially prejudiced as a result thereof and in any event shall not relieve it from any liability which it may have otherwise than on account of this indemnity agreement. In the case of parties indemnified pursuant to Section 6(a) above, counsel to such indemnified parties shall be selected by the Joint Book-Running Managers, and, in the case of parties indemnified pursuant to Section 6(b) above, counsel to such indemnified parties shall be selected by the Company. An indemnifying

- 22 -

party may participate at its own expense in the defense of any such action; provided, however, that counsel to the indemnifying party shall not (except with the consent of the indemnified party) also be counsel to the indemnified party. In no event shall the indemnifying parties be liable for fees and expenses of more than one counsel (in addition to any local counsel) separate from their own counsel for all indemnified parties in connection with any one action or separate but similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances. No indemnifying party shall, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever in respect of which indemnification or contribution could be sought under this Section 6 or Section 7 hereof (whether or not the indemnified parties are actual or potential parties thereto), unless such settlement, compromise or consent (i) includes an unconditional release of each indemnified party from all liability arising out of such litigation, investigation, proceeding or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party.

(d) Settlement without Consent if Failure to Reimburse. If at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel, such indemnifying party agrees that it shall be liable for any settlement of the nature contemplated by
Section 6(a)(ii) effected without its written consent if (i) such settlement is entered into more than 60 days after receipt by such indemnifying party of the aforesaid request, (ii) such indemnifying party shall have received notice of the terms of such settlement at least 45 days prior to such settlement being entered into and (iii) such indemnifying party shall not have reimbursed such indemnified party for the indemnified party's reasonable fees and expenses of counsel in accordance with such request prior to the date of such settlement. Notwithstanding the immediately preceding sentence, if at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel, an indemnifying party shall not be liable for any settlement effected without its consent if such indemnifying party (A) reimburses such indemnified party in accordance with such request to the extent it considers such request to be reasonable and (B) provides written notice to the indemnified party disputing the unpaid balance in good faith and substantiating the unpaid balance as unreasonable, in each case prior to the date of such settlement, subject to provision of notice by the indemnified party in accordance with (i) and (ii) above.

SECTION 7. Contribution. If the indemnification provided for in Section 6 hereof is for any reason unavailable to or insufficient to hold harmless an indemnified party in respect of any losses, liabilities, claims, damages or expenses referred to therein, then each indemnifying party shall contribute to the aggregate amount of such losses, liabilities, claims, damages and expenses incurred by such indemnified party, as incurred, (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Guarantors on the one hand and the Underwriters on the other hand from the offering of the Securities and the Guarantees pursuant to this Agreement or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company and the Guarantors on the one hand and of the Underwriters on the

- 23 -

other hand in connection with the statements or omissions which resulted in such losses, liabilities, claims, damages or expenses, as well as any other relevant equitable considerations.

The relative benefits received by the Company and the Guarantors on the one hand and the Underwriters on the other hand in connection with the offering of the Securities and the Guarantees pursuant to this Agreement shall be deemed to be in the same respective proportions as the total net proceeds from the offering of the Securities and the Guarantees pursuant to this Agreement (before deducting expenses) received by the Company and the Guarantors and the total underwriting discount received by the Underwriters, in each case as set forth on the cover of the Prospectus, or, if Rule 434 is used, the corresponding location on the Term Sheet, bear to the aggregate initial offering prices of the Securities (including the Guarantees) as set forth on such cover.

The relative fault of the Company and the Guarantors on the one hand and the Underwriters on the other hand shall be determined by reference to, among other things, whether any such untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Company or the Guarantors, or by the Underwriters, and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

The Company, the Guarantors and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 7 were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this Section
7. The aggregate amount of losses, liabilities, claims, damages and expenses incurred by an indemnified party and referred to above in this Section 7 shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in investigating, preparing or defending against any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever based upon any such untrue or alleged untrue statement or omission or alleged omission.

Notwithstanding the provisions of this Section 7, no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Securities (including the Guarantees) underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission.

No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

For purposes of this Section 7, (a) each person, if any, who controls an Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act shall have the same rights to contribution as such Underwriter, and
(b) each director of the Company and each Guarantor, and each person, if any, who controls the Company and each Guarantor, as the case may be, within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act shall have the same rights to contribution as the Company and each Guarantor. The Underwriters' respective obligations to

- 24 -

contribute pursuant to this Section 7 are several in proportion to the principal amount of Securities (including the Guarantees) set forth opposite their respective names in Schedule A hereto and not joint.

SECTION 8. Representations, Warranties and Agreements to Survive Delivery. All representations, warranties and agreements contained in this Agreement or in certificates of officers of the Company or any of the Subsidiaries submitted pursuant hereto, shall remain operative and in full force and effect, regardless of any investigation made by or on behalf of any Underwriter or controlling person, or by or on behalf of the Company or any Guarantor, and shall survive delivery of the Securities (including the Guarantees) to the Underwriters.

SECTION 9. Termination of Agreement.

(a) Termination; General. The Representatives may terminate this Agreement, by notice to the Company, at any time at or prior to the Closing Time
(i) if there has been, since the time of execution of this Agreement or since the respective dates as of which information is given in the Prospectus, any material adverse change in the condition (financial or otherwise), earnings, business affairs or business prospects of the Company and the Subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business, or (ii) if there shall have occurred a downgrading in the rating assigned to the Securities or the Guarantees or any of the Company's or any Guarantors' other debt securities by any nationally recognized securities rating agency, or if such securities rating agency shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of the Securities, the Guarantees or any of the Company's or Guarantors' other debt securities or guarantees of debt securities or (iii) if there has occurred any material adverse change in the financial markets in the United States or the international financial markets, any outbreak of hostilities or escalation thereof or other calamity or crisis or any change or development involving a prospective change in national or international political, financial or economic conditions, in each case the effect of which is such as to make it, in the judgment of the Representatives, impracticable to market the Securities and the Guarantees or to enforce contracts for the sale of the Securities and the Guarantees, or (iv) if trading in any securities of the Company has been suspended or limited by the Commission or the NASDAQ National Market System, or if trading generally on the American Stock Exchange or the New York Stock Exchange or in the NASDAQ National Market System has been suspended or limited, or minimum or maximum prices for trading have been fixed, or maximum ranges for prices have been required, by any of said exchanges or by such system or by order of the Commission, the National Association of Securities Dealers, Inc. or any other governmental authority, or (v) if a banking moratorium has been declared by either Federal or New York authorities.

(b) Liabilities. If this Agreement is terminated pursuant to this Section, such termination shall be without liability of any party to any other party except as provided in Section 4 hereof, and provided further that Sections 1, 6, 7 and 8 shall survive such termination and remain in full force and effect.

SECTION 10. Default by One or More of the Underwriters. If one or more of the Underwriters shall fail at Closing Time to purchase the Securities (including the Guarantees) which

- 25 -

it or they are obligated to purchase under this Agreement (the "Defaulted Securities"), the Representatives shall have the right, but not the obligation, within 24 hours thereafter, to make arrangements for one or more of the non-defaulting Underwriters, or any other underwriters, to purchase all, but not less than all, of the Defaulted Securities in such amounts as may be agreed upon and upon the terms herein set forth; if, however, the Representatives shall not have completed such arrangements within such 24-hour period, then:

(a) if the number of Defaulted Securities does not exceed 10% of the aggregate principal amount of the Securities (including the Guarantees) to be purchased hereunder, each of the non-defaulting Underwriters shall be obligated, severally and not jointly, to purchase the full amount thereof in the proportions that their respective obligations hereunder bear to the obligations of all non-defaulting Underwriters, or

(b) if the number of Defaulted Securities exceeds 10% of the aggregate principal amount of the Securities (including the Guarantees) to be purchased hereunder, this Agreement shall terminate without liability on the part of any non-defaulting Underwriters.

No action taken pursuant to this Section shall relieve any defaulting Underwriters from liability in respect of its default.

In the event of any such default which does not result in a termination of this Agreement, either (i) the Representatives or (ii) the Company shall have the right to postpone the Closing Time for a period not exceeding seven days in order to effect any required changes in the Registration Statement or Prospectus or in any other documents or arrangements. As used herein, the term "Underwriter" includes any person substituted for an Underwriter under this
Section 10.

SECTION 11. Default by the Company and the Guarantors. If the Company and the Guarantors shall fail at Closing Time to sell the number of Securities (including the Guarantees) that they are obligated to sell hereunder, then this Agreement shall terminate without any liability on the part of any non-defaulting party; provided, however, that the provisions of Sections 1, 4, 6, 7 and 8 shall remain in full force and effect. No action taken pursuant to this Section shall relieve the Company or the Guarantors from liability, if any, in respect of such default.

SECTION 12. Notices. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted by any standard form of telecommunication. Notices to the Underwriters shall be directed to Merrill Lynch at North Tower, World Financial Center, New York, New York 10281-1201, attention of James Forbes, and CSFB at 11 Madison Avenue, 23rd Floor, New York, New York 10010, attention of both Harris Hyman and the Transaction Advisory Group, with a copy to Fried, Frank, Harris, Shriver & Jacobson, One New York Plaza, New York, New York 10004, attention of Valerie Ford Jacob, Esq.; and notices to the Company shall be directed to it at One Malcolm Avenue, Teterboro, New Jersey 07608, attention of General Counsel, with a copy to Shearman & Sterling, 599 Lexington Avenue, New York, New York 10022, attention of Stephen T. Giove, Esq.

SECTION 13. Parties. This Agreement shall inure to the benefit of and be binding upon the Underwriters, the Company and the Guarantors and their respective successors. Nothing

- 26 -

expressed or mentioned in this Agreement is intended or shall be construed to give any person, firm or corporation, other than the Underwriters, the Company and the Guarantors and their respective successors and the controlling persons and officers and directors referred to in Sections 6 and 7 and their heirs and legal representatives, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision herein contained. This Agreement and all conditions and provisions hereof are intended to be for the sole and exclusive benefit of the Underwriters, the Company and the Guarantors and their respective successors, and said controlling persons and officers and directors and their heirs and legal representatives, and for the benefit of no other person, firm or corporation. No purchaser of Securities and Guarantees from any Underwriters shall be deemed to be a successor by reason merely of such purchase.

SECTION 14. Governing Law and Time. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. SPECIFIED TIMES OF DAY HEREIN REFER TO NEW YORK CITY TIME.

SECTION 15. Effect of Headings. The Article and Section headings herein and the Table of Contents are for convenience only and shall not affect the construction hereof.

- 27 -

If the foregoing is in accordance with your understanding of our agreement, please sign and return to the Company and the Guarantors a counterpart hereof, whereupon this instrument, along with all counterparts, will become a binding agreement among the Underwriters, the Company and the Guarantors in accordance with its terms.

Very Truly Yours,

QUEST DIAGNOSTICS INCORPORATED

By:   /s/  Leo C. Farrenkopf, Jr.
    -----------------------------------------------
              Name:    Leo C. Farrenkopf, Jr.
              Title:   Vice President, Secretary
                        and Deputy General Counsel

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED QUEST DIAGNOSTICS
CLINICAL LABORATORIES, INC. QUEST
DIAGNOSTICS INCORPORATED (CA) QUEST
DIAGNOSTICS INCORPORATED (MD) QUEST
DIAGNOSTICS LLC QUEST DIAGNOSTICS
INCORPORATED (MI) QUEST DIAGNOSTICS
INCORPORATED (CT) QUEST DIAGNOSTICS
INCORPORATED (MA) QUEST DIAGNOSTICS
OF PENNSYLVANIA INC. QUEST
DIAGNOSTICS INCORPORATED (OH)
METWEST INC.
NICHOLS INSTITUTE DIAGNOSTICS
DPD HOLDINGS, INC.
DIAGNOSTICS REFERENCE SERVICES INC.
LABORATORY HOLDINGS INCORPORATED

By:    /s/  Leo C. Farrenkopf, Jr.
    -----------------------------------------------
              Name:    Leo C. Farrenkopf, Jr.
              Title:   Vice President, Secretary
                       and Deputy General Counsel

- 28 -

PATHOLOGY BUILDING PARTNERSHIP,
a Delaware general partnership

By: Quest Diagnostics Incorporated, a Maryland
Corporation, its general partner

By  /s/ Leo C. Farrenkopf, Jr.
   ------------------------------------------------
              Name: Leo C. Farrenkopf, Jr.
              Title:   Vice President, Secretary
                        and Deputy General Counsel

QUEST DIAGNOSTICS INVESTMENTS INCORPORATED
a Delaware corporation

By: /s/ Peter C. Fulweiler
   ------------------------------------------------
              Name:  Peter C. Fulweiler
              Title:  President

QUEST DIAGNOSTICS FINANCE INCORPORATED
a Delaware corporation

By:  /s/ Peter C. Fulweiler
   ------------------------------------------------
              Name:  Peter C. Fulweiler
              Title: President

- 29 -

CONFIRMED AND ACCEPTED,
as of the date first above written:

MERRILL LYNCH, PIERCE, FENNER & SMITH
INCORPORATED
Credit Suisse First Boston Corporation
Banc of America Securities LLC
UBS Warburg LLC
Wachovia Securities, Inc.

BNY Capital Markets, Inc.
By: MERRILL LYNCH, PIERCE, FENNER & SMITH
INCORPORATED

By  /s/
   ---------------------------------------
          Authorized Signatory

For itself and the other Underwriters
named in Schedule A hereto.

- 30 -

                                   SCHEDULE A


                Name of Underwriter                          Principal Amount                 Principal Amount
                -------------------                     of 6 3/4% Senior Notes Due       of 7 1/2% Senior Notes Due
                                                           2006 To Be Purchased             2011 To Be Purchased
Merrill Lynch, Pierce, Fenner & Smith Incorporated                $106,564,000                  $106,564,000
Credit Suisse First Boston Corporation                              75,625,000                    75,625,000
Banc of America Securities LLC                                      32,656,000                    32,656,000
UBS Warburg LLC                                                     30,937,000                    30,937,000
Wachovia Securities, Inc.                                           17,187,000                    17,187,000
BNY Capital Markets, Inc.                                           12,031,000                    12,031,000

                  Total:                                          $275,000,000                  $275,000,000

- 1 -

SCHEDULE B-PRICING INFORMATION

QUEST DIAGNOSTICS INCORPORATED

$275,000,000 6 3/4% Senior Notes due 2006

1. The initial public offering price of the Securities, determined as provided in said Section 2, shall be 99.432% of the principal amount thereof, plus accrued interest, if any, from the date of issuance.

2. The purchase price to be paid by the Underwriters for the Securities shall be 98.832% of the principal amount thereof.

3. The interest rate on the Securities shall be 6 3/4% per annum.

4. At any time and from time to time, the Securities shall be redeemable, as a whole or in part, at the option of the Company, on at least 30 days, but not more than 60 days, prior notice, at a redemption price equal to the greater of:

o 100% of principal amount of the Securities to be redeemed, and

o the sum of the present values of the remaining scheduled payments discounted, on a semiannual basis, assuming a 360-day year consisting of twelve 30-day months, at the treasury rate plus 30 basis points,

plus, in each case, accrued interest to the date of redemption which has not been paid.

$275,000,000 7 1/2% Senior Notes due 2011

1. The initial public offering price of the Securities, determined as provided in said Section 2, shall be 99.598% of the principal amount thereof, plus accrued interest, if any, from the date of issuance.

2. The purchase price to be paid by the Underwriters for the Securities shall be 98.948% of the principal amount thereof.

3. The interest rate on the Securities shall be 7 1/2% per annum.

4. At any time and from time to time, the Securities shall be redeemable, as a whole or in part, at the option of the Company, on at least 30 days, but not more than 60 days, prior notice, at a redemption price equal to the greater of:


o 100% of principal amount of the Securities to be redeemed, and

o the sum of the present values of the remaining scheduled payments discounted, on a semiannual basis, assuming a 360-day year consisting of twelve 30-day months, at the treasury rate plus 35 basis points,

plus, in each case, accrued interest to the date of redemption which has not been paid.


                             SCHEDULE C - GUARANTORS



-------------------------------------------------------------------------------------------------------------------
Guarantor                               Ownership                                    Place of Incorporation or
                                                                                             Formation
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Holdings              Quest Diagnostics Incorporated (DE)       Delaware
Incorporated
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Clinical              Quest Diagnostics Holdings Incorporated   Delaware
Laboratories, Inc.
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Incorporated (CA)     Quest Holdings Incorporated (MI) (1)      California
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Incorporated (MD)     Quest Holdings Incorporated (MD) (2)      Maryland
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics LLC                   Quest Diagnostics Incorporated (DE)       Illinois
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Incorporated (MI)     Quest Diagnostics Incorporated (DE)       Michigan
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Incorporated (CT)     Laboratory Holdings Incorporated (MA)     Connecticut
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Incorporated (MA)     Laboratory Holdings Incorporated (MA)     Massachusetts
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics of Pennsylvania Inc.  Quest Diagnostics Incorporated (DE)       Delaware
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Incorporated (OH)1    Quest Diagnostics of Pennsylvania Inc.    Ohio
                                        (DE)
-------------------------------------------------------------------------------------------------------------------
MetWest Inc.                            DPD Holdings, Inc. (DE)                   Delaware
-------------------------------------------------------------------------------------------------------------------
Nichols Institute Diagnostics           Quest Diagnostics Incorporated (DE)       California
-------------------------------------------------------------------------------------------------------------------
DPD Holdings, Inc.                      Quest Diagnostics Incorporated (DE)       Delaware
-------------------------------------------------------------------------------------------------------------------
Diagnostics Reference Services Inc.     Quest Diagnostics Incorporated (MD)       Maryland
-------------------------------------------------------------------------------------------------------------------
Laboratory Holdings Incorporated        Quest Diagnostics Incorporated (DE)       Massachusetts
-------------------------------------------------------------------------------------------------------------------
Pathology Building Partnership          Diagnostic Reference Services Inc. (MD)   Maryland
                                        - 50%; Quest Diagnostics Incorporated
                                        (MD) - 50%
-------------------------------------------------------------------------------------------------------------------


1 In the process of being merged into Quest Diagnostics of Pennsylvania Inc.

-------------------------------------------------------------------------------------------------------------------
Guarantor                               Ownership                                    Place of Incorporation or
                                                                                             Formation
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Investments           Quest Diagnostics Incorporated (DE)       Delaware
Incorporated
-------------------------------------------------------------------------------------------------------------------
Quest Diagnostics Finance Incorporated  Quest Diagnostics Investments             Delaware
                                        Incorporated (DE)
-------------------------------------------------------------------------------------------------------------------

(1) This entity is a holding company that is being merged into its parent, Quest Diagnostics Incorporated (DE). The merger is expected to be completed by or shortly after the Closing Date.

(2) This entity is a holding company that is being merged into its parent, Quest Diagnostics Incorporated (DE). The merger is expected to be completed by or shortly after the Closing Date.


SCHEDULE D- SUBSIDIARIES 1

100% Quest Diagnostics Holdings Incorporated (f/k/a SBCL, Inc.) (DE) 100% Quest Diagnostics Clinical Laboratories, Inc. (f/k/a SmithKline Beecham Clinical Laboratories, Inc.) (DE)


(100%) Quest Diagnostics LLC (AZ)

(Expected to merge into Quest Diagnostics Clinical
Laboratories in 2001)

(100%) Quest Diagnostics Clinical Laboratories of Missouri LLC


(MO)

(Expected to merge into Quest Diagnostics Clinical
Laboratories in 2001)

(33-l/3%) Compunet Clinical Laboratories (OH)
(44%) Mid America Clinical Laboratories (IN)

(51%) Diagnostic Laboratory of Oklahoma LLC (OK)

100% DPD Holdings, Inc. (DE)
100% MetWest Inc. (DE)
100% Quest Diagnostics of Arizona Incorporated (DE).fn


(Expected to merge into MetWest in 2001)

49% Sonora Quest Laboratories LLC (AZ)

100% Laboratory Holdings Incorporated (MA) 100% Quest Diagnostics Incorporated (CT) 100% Quest Diagnostics Incorporated (MA)

100% Quest Holdings Incorporated (MD) (Expected to merge into Quest Diagnostics Incorporated (DE) in 2001)
100% Quest Diagnostics Incorporated (MD) 100% Diagnostic Reference Services Inc. (MD) 50% Pathology Building Partnership (MD) (gnl pshp)

100% Quest Holdings Incorporated (MI) (Expected to merge into Quest Diagnostics Incorporated (DE) in 2001)

100% Quest Diagnostics Incorporated (CA)

100% Quest Diagnostics LLC (IL)

100% Quest Diagnostics Incorporated (MI)

100% Quest Diagnostics of Pennsylvania Inc. (DE)

100% Quest Diagnostics Incorporated (OH)(Expected to merge into Quest Diagnostics of Pennsylvania Inc. in 2001)

100% Medical Management Systems Inc. (PA) (Expected to merge into Quest Diagnostics of Pennsylvania Inc. in 2001)

51% Quest Diagnostics Venture LLC (PA) 53.5% Associated Clinical Laboratories (PA) (gen pshp) 50% Surgical Eye Enterprise L.P. (PA) (ltd. pshp) 50% Surgical Eye Institute L.P. (PA) (ltd. pshp)

100% Quest Holdings Incorporated (DE) (Expected to merge into Quest Diagnostics Incorporated (DE) in 2001)
51% Quest Diagnostics of Missouri LLC (MO) (Expected to dissolve in 2001)


1 Certain joint ventures and partnerships are included that may not meet the definition of Subsidiary.

100% Quest MRL, Inc.(DE) (Expected to merge into MetWest in 2001)

100 % Quest Diagnostics Ventures LLC (DE) (Expected to merge into Quest Diagnostics Incorporated (DE) in 2001)

100% Quest Diagnostics Receivables Inc. (DE)

100% Quest Diagnostics Investments Incorporated (DE) 100% Quest Diagnostics Finance Incorporated (DE) 100% Nichols Institute Diagnostics (CA)
100% Nichols Institute Sales Corporation (U.S.V.I.) 100% Nichols Institute Diagnostics Limited (U. K.) 100% Nichols Institute Diagnostics Trading S.A. (Switzerland) 100% Nichols Institute Diagnostika GMBH (Germany) 100% Nichols Institute Diagnostika GMBH (Austria) 100% Nichols Institute International Holding B.V. (Netherlands) 100% Nichols Institute Diagnostics B.V. (Netherlands) 100% Nichols Institute Diagnostics SARL (France)

100% Quest Diagnostics do Brasil Ltda. S.C. (Brazil)

100% Quest Diagnostics Limited (UK)
100% The Pathology Partnership plc

100% Nomad-Massachusetts, Inc. (MA)
100% Quest Diagnostics, S.A. de C.V. (Mexico).fn (Owns Juarez Business) 100% Analisis, S.A. (Mexico)
100% Laboratorios Clinicos de Mexico, S.A. de C.V. (Mexico).
100% Servicios de Laboratorio, S.A. de C.V. (Mexico) 100% Laboratorios de Frontera Polanco, S.A. de C.V. (Mexico)

100% Laboratorio de Analisis Biomedicos, S.A. (Mexico).


Exhibit A

FORM OF OPINION OF COMPANY'S COUNSEL TO
BE DELIVERED PURSUANT TO SECTION 5(b)

(i) The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware, and has corporate power and authority to own, lease and operate its properties, and to enter into and perform its obligations under the Purchase Agreement, the Indenture, the Notes and the New Credit Agreement.

(ii) The Company has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or be in good standing would not, individually or in the aggregate, have a Material Adverse Effect.

(iii) Each of the Delaware Guarantors has been duly incorporated or organized and is validly existing as a corporation, partnership or limited liability company in good standing under the laws of the jurisdiction of its organization and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus and to enter into and perform its obligations under the Purchase Agreement, the Indenture, the Guarantees issued by it and the New Credit Agreement.

(iv) Each Delaware Guarantor is duly qualified as a foreign corporation, partnership or limited liability company for the transaction of business and is in good standing in each jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not, individually or in the aggregate, have a Material Adverse Effect.

(v) All of the issued and outstanding capital stock, partnership or membership interests of each Guarantor has been duly authorized and validly issued, is fully paid and non-assessable (other than general partnership interest) and, to the best of my knowledge, except for directors' qualifying shares and except as otherwise set forth in the Prospectus, is owned by the Company, directly or through subsidiaries, free and clear of all liens, encumbrances, equities or claims.

(vi) The Purchase Agreement has been duly authorized, executed and delivered by the Company and each of the Delaware Guarantors.

(vii) The Base Indenture has been duly authorized, executed and delivered by the Company and each of the Delaware Guarantors.

(viii) The First Supplemental Indenture has been duly authorized, executed and


delivered by the Company and each of the Delaware Guarantors.

(ix) The Notes have been duly authorized and executed by the Company.

(x) The Guarantees issued by each of the Delaware Guarantors have been duly authorized and executed by each of the Delaware Guarantors.

(xi) The New Credit Agreement has been duly authorized, executed and delivered by the Company and each of the Delaware Guarantors.

(xii) The statements in the Prospectus under "Risk Factors--If we fail to comply with extensive laws and regulations we could suffer penalties or be required to make significant changes to our operations," "Risk Factors--Professional liability litigation could have an adverse impact on our client base and reputation," "Business--Quality Assurance," "Business--Regulation of Clinical Laboratory Operations," "Business--Regulation of Reimbursement for Clinical Laboratory Services" and "Business--Government Investigations and Related Claims," insofar as they purport to describe the provisions of the laws, legal proceedings and documents referred to therein, fairly present the information disclosed therein in all material respects.

(xiii) To the best of my knowledge after due inquiry and except as disclosed in the Prospectus, there is no action, suit or proceeding (including qui tam proceedings) pending before or by any government, governmental or regulatory instrumentality or agency or court or any suit, action or proceeding (including qui tam proceedings) threatened against or affecting the Company or any of its subsidiaries that could reasonably be expected to have a Material Adverse Effect, or could reasonably be expected to materially adversely affect the consummation of the transactions contemplated in the Purchase Agreement or the performance by the Company or the Guarantors of their respective obligations under the Purchase Agreement, the Indenture, the Notes, the Guarantees and New Credit Agreement.

(xiv) None of the Company, any Guarantor, or any of their respective subsidiaries is in violation of its certificate of incorporation or by-laws or similar constituent documents and, to the best of my knowledge, no default by the Company, any Guarantor or any of their respective subsidiaries exists in the due performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, loan agreement, note, lease or other agreement or instrument that is described or referred to in the Prospectus or any document incorporated by reference therein, in each case of the foregoing, that singly or in the aggregate, have a Material Adverse Effect.

(xv) Each of the Guarantors is not, and will not be, as a result of the sale of the Guarantees, pursuant to the Purchase Agreement, an investment company within the meaning of the Investment Company Act of 1940, as amended.

(xvi) No authorization, approval, consent, license, order, registration, qualification or decree of any state or U.S. federal court or governmental authority or agency that regulates health care is necessary or required and, in the case of the Delaware Guarantors only, no authorization, approval, consent, license, order, registration, qualification or decree of any


U.S. federal court or governmental authority or agency (other than such as may be required under applicable federal and state securities laws of the various jurisdictions in which the Notes or the Guarantees issued by the Delaware Guarantors, as the case may be, will be offered or sold, as to which I express no opinion) is necessary or required (i) for the performance by the Company or any of the Delaware Guarantors of their respective obligations under the Purchase Agreement, the New Credit Agreement, or the Offer to Purchase and Consent Solicitation Statement dated May 24, 2001 of the Company (the "Offer to Purchase"), as the case may be, (ii) in connection with the offering, issuance or sale of the Notes or the Guarantees issued by the Delaware Guarantors, as the case may be, under the Purchase Agreement or (iii) for the due execution, delivery or performance of and the consummation of the transactions contemplated by the Purchase Agreement, the Indenture, the Notes, the Guarantees issued by the Delaware Guarantors, the New Credit Agreement, or the Offer to Purchase, as the case may be, except (A) such authorizations, approvals, consents, licenses, orders, registrations, qualifications or decrees the failure so to obtain would not, individually or in the aggregate, have a Material Adverse Effect, and (B) such as have been made or can be made after the Closing Time without having a Material Adverse Effect.

(xvii) Assuming the repayment and termination of the Company's and the Guarantors' obligations under the Existing Credit Agreement, the execution, delivery and performance of the Purchase Agreement, the Indenture, the Notes, the Guarantees issued by the Delaware Guarantors, the New Credit Agreement and the consummation of the transactions contemplated in the Purchase Agreement, and compliance by each of the Company and the Delaware Guarantors with their respective obligations under the Purchase Agreement, the Indenture, the Notes, the Guarantees issued by the Delaware Guarantors and the New Credit Agreement do not and will not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or default or a Repayment Event (as defined below) with respect to the Company or any of the Delaware Guarantors under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Company, any Delaware Guarantor pursuant to, any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease or any other agreement or instrument known to me to which the Company or any Delaware Guarantor is a party, nor will such action result in any violation of the certificate of incorporation or by-laws of the Delaware Guarantors or any applicable law, statute, rule, regulation, judgment, order, writ or decree of any state or U.S. federal government, government instrumentality or court having jurisdiction over the Company or any Delaware Guarantor or any of their assets or properties except for (i) such conflicts, breaches or liens, charges or encumbrances that singly or in the aggregate, would not result in a Material Adverse Effect and (ii) any liens, charges or encumbrances that are created pursuant to the New Credit Agreement. As used herein, a "Repayment Event" means with respect to any person, any event or condition that gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder's behalf) issued by such person the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by such person.

(xviii) To the best of my knowledge, no authorization, approval, consent, license, order, registration, qualification or decree of any state or U.S. federal court or governmental authority or agency that regulates health care is necessary or required and no authorization,


approval, consent, license, order, registration, qualification or decree of any U.S. federal court or governmental authority or agency (other than such as may be required under applicable federal and state securities laws of the various jurisdictions in which the Guarantees issued by the Non-Delaware Guarantors will be offered or sold, as to which I express no opinion) is necessary or required
(i) for the performance by the Non-Delaware Guarantors of their respective obligations under the Purchase Agreement, the New Credit Agreement or the Offer to Purchase, as the case may be, (ii) in connection with the offering, issuance or sale of the Guarantees issued by the Non-Delaware Guarantors under the Purchase Agreement or (iii) for the due execution, delivery or performance by the Non-Delaware Guarantors of and the consummation of the transactions contemplated by the Purchase Agreement, the Indenture, the Guarantees issued by the Non-Delaware Guarantors, the New Credit Agreement or the Offer to Purchase except (A) such authorizations, approvals, consents, licenses, orders, registrations or qualifications the failure so to obtain would not, individually or in the aggregate, have a Material Adverse Effect and (B) such as have been made or can be made after the Closing Time without having a Material Adverse Effect.

(xix) To the best of my knowledge, assuming the repayment and termination of the Company's and the Guarantors' obligations under the Existing Credit Agreement, the execution, delivery and performance of the Purchase Agreement, the Indenture, the Notes, the Guarantees issued by the Non-Delaware Guarantors, the New Credit Agreement the consummation of the transactions contemplated in the Purchase Agreement, and compliance by each of the Non-Delaware Guarantors with their respective obligations under the Purchase Agreement, the Indenture, the Notes, the Guarantees issued by the Non-Delaware Guarantors and the New Credit Agreement do not and will not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or default or a Repayment Event with respect to the Non-Delaware Guarantors under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of any Non-Delaware Guarantor pursuant to, any contract indenture, mortgage, deed of trust, loan or credit agreement, note, lease or any other agreement or instrument known to me to which any Non-Delaware Guarantor is a party, nor will such action result in any violation of any applicable law, statute, rule, regulation, judgment, order, writ or decree of any state or U.S. federal government, government instrumentality or court having jurisdiction over any Non-Delaware Guarantor or any of its assets or properties except for (i) such conflicts, breaches or liens, charges or encumbrances that singly or in the aggregate, would not result in a Material Adverse Effect and (ii) any liens, charges or encumbrances that are created pursuant to the New Credit Agreement.


Exhibit B

FORM OF OPINION OF DEPUTY GENERAL COUNSEL OF THE COMPANY TO
BE DELIVERED PURSUANT TO SECTION 5(c)

(i) The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus, to enter into and perform its obligations under the Purchase Agreement, the Indenture, the Notes and the New Credit Agreement.

(ii) Each of the California Guarantors has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of California and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus, and to enter into and perform its respective obligations under the Purchase Agreement, the Indenture, the Guarantees issued by it and the New Credit Agreement.

(iii) The Purchase Agreement has been duly authorized, executed and delivered by the Company and each of the California Guarantors.

(iv) The Base Indenture has been duly authorized, executed and delivered by the Company and each of the California Guarantors, and assuming the Non-California Guarantor Assumptions and the due authorization, execution and delivery thereof by the Trustee, the Base Indenture constitutes a valid and binding obligation of the Company and each of the Guarantors, enforceable against the Company and each of the Guarantors in accordance with its terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or other similar laws relating to or affecting enforcement of creditors' rights generally, and the enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law). The Base Indenture has been duly qualified under the Trust Indenture Act of 1939, as amended.

(v) The First Supplemental Indenture has been duly authorized, executed and delivered by the Company and each of the California Guarantors, and assuming the Non-California Guarantor Assumptions and the due authorization, execution and delivery thereof by the Trustee, the First Supplemental Indenture constitutes a valid and binding obligation of the Company and each of the Guarantors, enforceable against the Company and each of the Guarantors in accordance with its terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or other similar laws relating to or affecting enforcement of creditors' rights generally, and the enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law).


(vi) The Notes have been duly authorized and executed by the Company and when authenticated by the Trustee in accordance with the provisions of the Indenture and delivered by the Company to and paid for by you in accordance with the terms of the Purchase Agreement, will constitute valid and binding obligations of the Company, enforceable against the Company in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or other similar laws relating to or affecting enforcement of creditors' rights generally, and the enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), and will be entitled to the benefits of the Indenture.

(vii) The Guarantees issued by each of the California Guarantors have been duly authorized and executed by each of the California Guarantors and assuming the Non-California Guarantor Assumptions, the Guarantees issued by each Guarantor, when authenticated by the Trustee in accordance with the provisions of the Indenture and delivered by the Guarantors to and paid for by you in accordance with the terms of the Purchase Agreement, will constitute valid and binding obligations of the Guarantor which issued such Guarantees, enforceable against such Guarantor in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or other similar laws relating to or affecting enforcement of creditors' rights generally, or the enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), and will be entitled to the benefits of the Indenture.

(viii) The statements in the Prospectus under "Description of the Notes," and Description of Other Indebtedness," insofar as such statements purport to constitute a summary of the legal matters and documents referred to therein, fairly summarize in all material respects the matters and documents referred to therein.

(ix) The statements in the Prospectus under "United States Federal Income Tax Considerations," insofar as such section purports to summarize provisions of federal law of the United States referred to thereunder, fairly summarizes, subject to the limitations stated therein, such provisions in all material respects.

(x) No authorization, approval, consent, license, order, registration, qualification or decree of any U.S. federal court or governmental authority or agency (other than such as may be required under the applicable federal and state securities laws of the various jurisdictions in which the Notes will be offered or sold, as to which we express no opinion) is necessary or required (i) for the performance by the Company of its obligations under the Purchase Agreement, or the Offer to Purchase and Consent Solicitation Statement dated May 24, 2001 of the Company (the "Offer to Purchase") (ii) in connection with the offering, issuance or sale of the Notes under the Purchase Agreement or (iii) for the due execution, delivery or performance of and the consummation of the transactions contemplated by the Purchase Agreement, the Indenture, the Notes, or the Offer to Purchase, except (A) such authorizations, approvals, consents, licenses, orders, registrations or qualifications the failure so to obtain would not,


individually or in the aggregate, have a Material Adverse Effect, and (B) such as have been made or can be made after the Closing Time without having a Material Adverse Effect, it being understood that we express no opinion with respect to any law, rule or regulation relating to health care.

(xi) The execution, delivery and performance of the Purchase Agreement, the Indenture, and the Notes, the consummation of the transactions contemplated in the Purchase Agreement, and compliance by the Company with its obligations under the Purchase Agreement, the Indenture, the Notes, do not and will not result in any violation of the certificate of incorporation or by-laws of the Company or, to our knowledge, any applicable law, statute, rule or regulation of any federal or New York State government or government instrumentality having jurisdiction over the Company or any of its assets or properties, it being understood that we express no opinion with respect to the laws, statutes, rules or regulations relating to health care.

(xii) The Company is not, and will not be, as a result of the sale of the Notes pursuant to the Purchase Agreement, an investment company within the meaning of the Investment Company Act of 1940, as amended.

(xiii) The Registration Statement and the Prospectus, as amended or supplemented (except for Exhibit 12 to the Registration Statement and other than the financial statements and other accounting information contained therein, or omitted therefrom, and the Statement of Eligibility on form T-1 of the Trustee, as to which we are not expressing an opinion), excluding the documents incorporated or deemed incorporated by reference therein, as of their respective effective or issue dates, appeared on their face to have been appropriately responsive in all material respects to the requirements of the Securities Act and the rules and regulations of the Commission thereunder.

(xiv) Each document filed pursuant to the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and incorporated or deemed incorporated by reference in the Registration Statement or the Prospectus, as amended or supplemented (except for the financial statements and other accounting information contained therein or incorporated or deemed incorporated by reference therein, or omitted therefrom, as to which we are not expressing an opinion), when so filed with the Commission, appeared on its face to have been appropriately responsive in all material respects to the requirements of the Exchange Act and the rules and regulations of the Commission thereunder.


Exhibit 4.1

SPECIMEN

FORM OF

6.75% Senior Note due 2006

THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A NOMINEE THEREOF. THIS NOTE MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND SUCH CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.


SPECIMEN

QUEST DIAGNOSTICS INCORPORATED

                           6.75% Senior Note due 2006

                   Unconditionally guaranteed as to payment of
                          principal of and interest by
                            the Subsidiary Guarantors

No.  0 (Specimen)                                                   $[_________]

CUSIP: 748 34L AD2

                  Quest Diagnostics Incorporated, a Delaware corporation (herein

called the "Company," which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of $[_________] on July 12, 2006 (the "Stated Maturity") (except to the extent redeemed or repaid prior to the Stated Maturity) and to pay interest thereon from June 27, 2001 or from the most recent Interest Payment Date to which interest has been paid or duly provided for semi-annually at the rate of 6.75% per annum, on January 12 and July 12, commencing with January 12, 2002, on the Stated Maturity and on any Redemption Date (each such date, an "Interest Payment Date") until the principal hereof is paid or made available for payment.

Payment of Interest. The interest so payable, and punctually paid or made available for payment, on any Interest Payment Date, will, as provided in the Indenture, be paid, in immediately available funds, to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business January 1 or July 1 (whether or not a Business Day, as defined in the Indenture), as the case may be, next preceding such Interest Payment Date (the "Regular Record Date"). Any such interest not punctually paid or duly provided for ("Defaulted Interest") will forthwith cease to be payable to the Holder on such Regular Record Date, and such Defaulted Interest, may be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on a special record date (the "Special Record Date") for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Notes not less than ten days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Place of Payment. Payment of interest on this Note will be made at the Corporate Trust Office of the Trustee or such other office or agency of the Company as may be designated for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that each installment of interest and payment of principal on this Notes may at the Company's option be paid in immediately available funds by transfer to an account maintained by the payee located in the United States. Payment of the principal of this Note on the Stated Maturity will be made against presentation of this Note at the office or agency of the Company maintained for that purpose in the Borough of Manhattan, The City of New York, in such coin or currency of the


United States of America as at the time of payment is legal tender for the payment of public and private debts.

Time of Payment. In any case where any Interest Payment Date, Redemption Date, Stated Maturity shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of the Indenture or this Note), payment of principal or interest, if any, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force and effect as if made on the Interest Payment Date, Redemption Date, or at Stated Maturity; provided that no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date, Repayment Date, or Stated Maturity, as the case may be.

Legends. The statements set forth in the restrictive legends above are an integral part of the terms of this Note and by acceptance hereof each Holder of this Note agrees to be subject to and bound by the terms and provisions set forth in such legend.

General. This Note is one of a duly authorized issue of securities (herein called the "Securities") of the Company, issued and to be issued in one or more series under an indenture, dated as of June 27, 2001, as it may be supplemented from time to time (herein called the "Indenture"), between the Company and The Bank of New York, Trustee (herein called the "Trustee", which term includes any successor trustee under the Indenture with respect to a series of which this Note is a part), to which indenture and all indentures supplemental thereto, including the supplemental indenture dated June 27, 2001 (the "Supplemental Indenture"), reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Note is one of a duly authorized series of Securities designated as "6.75 Senior Notes due 2006" (collectively, the "Notes"), initially limited in aggregate principal amount to $[_________].

Further Issuance. The Company may from time to time, without the consent of the Holders of Notes of this series, issue additional Notes (the "Additional Notes") of this series having the same ranking and the same interest rate, maturity and other terms as the Notes of this series. Any Additional Notes of this series and the Notes of this series will constitute a single series under the Indenture and all references to the Notes of this series shall include the Additional Notes unless the context otherwise requires.

Book-Entry. This Note is a Global Note representing $275,000,000 of the Notes. This Note is a "book entry" Note and is being registered in the name of Cede & Co. as nominee of The Depository Trust Company (the "Depository "), a clearing agency. Subject to the terms of the Indenture, this Note will be held by a clearing agency or its nominee, and beneficial interest will be held by beneficial owners through the book-entry facilities of such clearing agency or its nominee in minimum denominations of $1,000 and integral multiples thereof. As long as this Note is registered in the name of the Depository or its nominee, the Trustee will make payments of principal and interest on this Note by wire transfer of immediately available funds to the Depository or its nominee. Notwithstanding the above, the final payment on this Note will be made after due notice by the Trustee of the pendency of such payment and only upon presentation and surrender of this Note at its principal corporate trust office or such other

2

offices or agencies appointed by the Trustee for that purpose and such other locations provided in the Indenture.

Guarantees. This Note is entitled to the benefits of the Subsidiary Guarantees by each of the Subsidiary Guarantors of the due and punctual payment and performance of the Guarantor Obligations made in favor of the Trustee for the benefit of the Holder of this Note. Reference is hereby made to Article Sixteen of the Indenture for a statement of the respective rights, limitations of rights, duties and obligations under the Guarantees of each of the Guarantors.

Events of Default. If an Event of Default with respect to the Notes shall have occurred and be continuing, the principal of the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Maturity. The Notes of this series are not subject to any sinking fund. The Notes of this series will be redeemable at any time, at the option of the Company, in whole or from time to time in part, upon not less than 30 nor more than 60 days' prior notice, on any date prior to their maturity at a Redemption Price, calculated pursuant to the Indenture, together with accrued interest thereon, if any, to the Redemption Date (subject to the rights of holders of record on the Regular Record Date that is prior to the Redemption Date to receive interest on the relevant Interest Payment Date). In the case of any partial redemption, selection of the Notes of this series for redemption will be made by the Trustee by such methods, as the Trustee in its sole discretion shall deem fair and appropriate. If any Note is to be redeemed in part only, the notice of redemption relating to such Note shall state the portion of the principal amount thereof to be redeemed. A new Note in principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder thereof upon cancellation of this Note.

Defeasance and Covenant Defeasance. The Indenture contains provisions for defeasance at any time of (a) the entire indebtedness of the Company on this Note and (b) certain restrictive covenants and the related Defaults and Events of Default, upon compliance by the Company with certain conditions set forth therein, which provisions apply to this Note.

Modification and Waivers; Obligations of the Company Absolute. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series. Such amendment may be effected under the Indenture at any time by the Company, the Subsidiary Guarantors and the Trustee with the consent of the Holders of not less than a majority in aggregate principal amount of the Outstanding Notes of each series affected thereby. The Indenture also contains provisions permitting the Holders of not less than a majority in aggregate principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Outstanding Securities, to waive compliance by the Company with certain provisions of the Indenture. Furthermore, provisions in the Indenture permit the Holders of not less than a majority in aggregate principal amount of the Outstanding Securities of individual series to waive on behalf of all of the Holders of Securities of such individual series certain past defaults under the Indenture and their consequences. Any such consent or waiver shall be conclusive and binding upon the Holder of this Note and upon all future Holders of this Note and of any Note

3

issued upon the registration of transfer hereof or in exchange hereof or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and interest on this Note at the time, place, and rate, and in the coin or currency, herein prescribed.

Limitation on Suits. As set forth in, and subject to, the provisions of the Indenture, no Holder of any Note of this series will have any right to institute any proceeding with respect to the Indenture or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with respect to this series, the Holders of not less than 25% in principal amount of the Outstanding Notes of this series shall have made written request, and offered reasonable indemnity, to the Trustee to institute such proceedings as trustee, and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Notes of this series a direction inconsistent with such request and shall have failed to institute such proceeding within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for the enforcement of payment of the principal of or interest on this Note on or after the respective due dates expressed herein.

Authorized Denominations. The Notes of this series are issuable only in registered form without coupons in denominations of $1,000 or any integral multiple thereof.

Registration of Transfer or Exchange. As provided in the Indenture and subject to certain limitations herein and therein set forth, the transfer of this Note is registrable in the Security Register upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

As provided in the Indenture and subject to certain limitations herein and therein set forth, the Notes are exchangeable for a like aggregate principal amount of Notes of different authorized denominations, as requested by the Holders surrendering the same.

This Note is a Global Security. If the Depository is at any time unwilling, unable or ineligible to continue as depository and a successor depository is not appointed by the Company within 90 days or an Event of Default under the Indenture has occurred and is continuing, the Company will issue Securities in certificated form in exchange for each Global Security. In addition, the Company may at any time determine not to have Securities represented by a Global Security and, in such event, will issue Securities in certificated form in exchange in whole for the Global Security representing such Security. In any such instance, an owner of a beneficial interest in a Global Security will be entitled to physical delivery in certificated form of Securities equal in principal amount to such beneficial interest and to have such Securities registered in its name. Securities so issued in certificated form will be issued in denominations

4

of $1,000 or any amount in excess thereof which is an integral multiple of $1,000 and will be issued in registered form only, without coupons.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Note for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Holder as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Note shall be governed by and construed in accordance with the law of the State of New York.

5

Unless the certificate of authentication hereon has been executed by the Trustee by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

Dated:   , 2001
                                              QUEST DIAGNOSTICS INCORPORATED


                                              By:
                                                 -------------------------------
                                              Name:
Attest:                                       Title:


------------------------
Name:

Title:

6

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Notes of the series designated and referred to in the within-mentioned Indenture, as such is supplemented by the within-mentioned First Supplemental Indenture.

THE BANK OF NEW YORK
as Trustee

By
Authorized Signatory

Dated: , 2001

7

GUARANTEE OF THE INITIAL SUBSIDIARY GUARANTORS

FOR VALUE RECEIVED, each of the Initial Subsidiary Guarantors (as such term is defined in the Indenture, as amended by the First Supplemental Indenture), hereby, jointly and severally, unconditionally guarantees to the Holder of the Note upon which this Subsidiary Guarantee is endorsed (the "Note") and to the Trustee on behalf of the Holder, the prompt payment of the principal of (and premium, if any, on) and interest (including, in case of default, interest on principal and, to the extent permitted by applicable law, on overdue interest and including any additional interest required to be paid according to the terms of the Notes) on the Note, when due (whether at Stated Maturity, upon Redemption, upon acceleration, upon tender for repayment at the option of the Company), according to the terms hereof and the terms of the Indenture (the "Guarantor Obligations"). This Guarantee is a guarantee of payment and not of collection and is a continuing guarantee and shall apply to all Guarantor Obligations whenever arising.

Obligations Unconditional and Absolute. The obligations of the Initial Subsidiary Guarantors hereunder are absolute and unconditional irrespective of the value, genuineness, validity, regularity or enforceability of the Indenture or this Note, to the fullest extent permitted by applicable law, irrespective of any circumstance whatsoever which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor. Each of the Initial Subsidiary Guarantors agrees that this Guarantee may be enforced by the Holder of this Note without the necessity at any time of proceeding against the Company or any other Person (including a co-guarantor) or to pursue any other remedy or enforce any other right. Each of the Initial Guarantors further agrees that nothing contained herein shall prevent the Holder of this Note from suing on this Note or the Indenture or from exercising any other rights available under this Note and the Indenture, and the exercise of any of the aforesaid rights and shall not constitute a discharge of any Initial Subsidiary Guarantor's obligations hereunder and under the Indenture; it being the purpose and the intent of each Initial Subsidiary Guarantor that its obligations under this Note and under the Indenture shall be absolute, independent and unconditional under any and all circumstances. Neither any Initial Subsidiary Guarantor's obligations under this Guarantee nor any remedy for the enforcement thereof shall be impaired, modified, changed or released in any manner whatsoever by an impairment, modification, change, release or limitation of the liability of the Company or by reason of the bankruptcy or insolvency of the Company. Each Initial Subsidiary Guarantor waives any and all notice of the creation, renewal, extension or accrual of any of the Guarantor Obligations or acceptance of this Guarantee. The Guarantor Obligations, and any of them, shall conclusively be deemed to have been created, contracted or incurred, or renewed, extended, amended or waived, in reliance upon this Guarantee.

Subrogation. Each of the Initial Subsidiary Guarantors shall be subrogated to all rights of the Holder of the Note against the Company in respect of any amounts paid by such Initial Subsidiary Guarantor on account of the Note or the Indenture; provided, however, that such Initial Subsidiary Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (or premium, if any, on) and interest on all Notes of this series shall have been indefeasibly paid in full.

1

Modifications. Each Initial Subsidiary Guarantor agrees that
(a) the time or place of payment of the Guarantor Obligations may be changed or extended, in whole or in part, to a time certain or otherwise, and may be renewed or accelerated, in whole or in part; (b) the Company and any other party liable for payment under the Indenture or under the Note may be granted indulgences generally; (c) any of the provisions of this Note or the Indenture may be modified, amended or waived; and (d) any party (including any Subsidiary Guarantor) liable for the payment under this Note or under the Indenture may be granted indulgences or be released; all without notice to or further assent by such Initial Subsidiary Guarantor, which shall remain bound thereon, notwithstanding any such exchange, compromise, surrender, extension, renewal, acceleration, modification, indulgence or release.

Waiver of Rights. Each of the Initial Subsidiary Guarantors hereby waives to the fullest extent permitted by law: (a) notice of acceptance of this Guarantee by the Holder of this Note; (b) presentment and demand for payment or performance of any of the Guarantor Obligations; (c) protest and notice of dishonor or default with respect to the Guarantor Obligations; (d) all other notices to which such Initial Subsidiary Guarantor might otherwise be entitled.

Reinstatement. The obligations of the Initial Subsidiary Guarantors under this Note and under Article Sixteen shall be automatically reinstated if and to the extent that for any reason any payment by or on behalf of any Person in respect of the Guarantor Obligations is rescinded or must otherwise be restored by any Holder of the Notes of this series, whether as a result of any proceedings in bankruptcy or reorganization or otherwise.

Remedies. Each of the Initial Subsidiary Guarantors further agrees, to the fullest extent that it may lawfully do so, that as between each such Initial Subsidiary Guarantor, on the one hand, and the Holder and the Trustee, on the other hand, the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five of the Indenture for the purposes of this guarantee, notwithstanding any stay, injunction or other prohibition extant under any applicable bankruptcy law preventing such acceleration in respect of the obligations guaranteed hereby.

Rights of Contribution. The Initial Subsidiary Guarantors, in connection with payments made hereunder, shall have contribution rights against the other Subsidiary Guarantors as permitted under applicable law. Such contribution rights shall be subordinate and subject in right of payment to the obligations of the Subsidiary Guarantors under this Note and no Initial Subsidiary Guarantor shall exercise such rights of contribution until all Guarantor Obligations have been paid in full.

Limitation of Guaranty. Notwithstanding any provision to the contrary contained herein or in the Indenture, to the extent the obligations of any Initial Subsidiary Guarantor shall be adjudicated to be invalid or unenforceable for any reason (including, without limitation, because of any applicable state or federal law relating to fraudulent conveyances or transfers) then the obligations of the Initial Subsidiary Guarantors hereunder shall be limited to the maximum amount that is permissible under applicable law (whether federal or state or otherwise and including, without limitation, the Bankruptcy Code).

2

Release of Guarantors. Each of the Initial Subsidiary Guarantors hereby covenants that its Subsidiary Guarantee will not be discharged except by complete performance of its obligations contained in the Note, this Subsidiary Guarantee and pursuant to the Indenture; provided, however, that if
(a) an Initial Subsidiary Guarantor does not guarantee any Indebtedness of the Company the amount of which, when added together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary Guarantors, would exceed $50 million in the aggregate, excluding the Notes of this series, and all outstanding Indebtedness of such Subsidiary Guarantor would have been permitted to be incurred pursuant to Section 1011 of the Indenture measured at the time of the release and discharge as described in this paragraph, (b) the Notes of this series are defeased and discharged pursuant to Article Fourteen of the Indenture, or (c) all or substantially all of the assets of such Initial Subsidiary Guarantor or all of the capital stock of such Initial Subsidiary Guarantor is sold (including by issuance, merger, consolidation or otherwise) by the Company or any of its Subsidiaries, then in each case of (a), (b) or (c) above, such Subsidiary Guarantor or the corporation acquiring such assets (in the event of a sale or other disposition of all or substantially all of the assets or capital stock of such Subsidiary Guarantor) shall be automatically and without any further action on the part of any party to the Indenture, and upon notice to the Trustee, be fully released and discharged from all its liabilities and obligations under or in respect of the Indenture and this Subsidiary Guarantee of the Note, and promptly upon the request of the Company and at the expense of the Company, the Trustee shall execute such documents and take such other action as is reasonably requested by the Company to evidence the release and discharge of such Guarantor from all such liabilities and obligations and shall, if applicable, certify to the Company that such Initial Subsidiary Guarantor has no liabilities or obligations resulting from a demand on such Initial Subsidiary Guarantor's Guarantee.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Subsidiary Guarantee shall be governed by and construed in accordance with the law of the State of New York.

Subject to the next following paragraph, each Initial Subsidiary Guarantor hereby certifies and warrants that all acts, conditions and things required to be done and performed and to have happened precedent to the creation and issuance of this Subsidiary Guarantee and to constitute the same valid obligation of each Initial Subsidiary Guarantor have been done and performed and have happened in due compliance with all applicable laws.

(Remainder of page intentionally left blank.)

3

This Subsidiary Guarantee shall not be valid or become obligatory for any purpose until the certificate of authentication on the Note upon which this Subsidiary Guarantee is endorsed has been signed by the Trustee under the Indenture referred to in this Note.

Dated:                , 2001
       ---------------
                                              QUEST DIAGNOSTICS HOLDINGS
                                              INCORPORATED


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS CLINICAL
                                              LABORATORIES, INC.


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS INCORPORATED
                                                (CA)


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:

Title:

4

QUEST DIAGNOSTICS INCORPORATED
(MD)

                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS LLC


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS INCORPORATED
                                                (MI)


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS INCORPORATED
                                                (CT)


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:

Title:

5

QUEST DIAGNOSTICS INCORPORATED
(MA)

                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS OF PENNSYLVANIA
                                                INC.


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              QUEST DIAGNOSTICS INCORPORATED
                                                (OH)


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              METWEST INC.


                                              By:______________________________
Attest:                                       Name:
                                              Title:

----------------------------
Name:

Title:

6

NICHOLS INSTITUTE DIAGNOSTICS

                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              DPD HOLDINGS, INC.


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              DIAGNOSTICS REFERENCE SERVICES
                                                INC.


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:
Title:
                                              LABORATORY HOLDINGS INCORPORATED


                                              By:
                                                 -------------------------------
Attest:                                       Name:
                                              Title:

----------------------------
Name:

Title:

7

PATHOLOGY BUILDING PARTNERSHIP

                                              By Quest Diagnostics Incorporated
                                                 (MD) As General Partner
Attest:
                                              By:
                                                 -------------------------------
                                              Name:
----------------------------                  Title:
Name:
Title:
                                              QUEST DIAGNOSTICS
                                              INVESTMENTS INCORPORATED


Attest:                                       By:
                                                 -------------------------------
                                              Name:
                                              Title:
----------------------------
Name:
Title:                                        By:
                                                 -------------------------------
                                              Name:
                                              Title:

                                              QUEST DIAGNOSTICS
                                              FINANCE INCORPORATED


Attest:                                       By:
                                                 -------------------------------
                                              Name:
                                              Title:
----------------------------
Name:
Title:                                        By:
                                                 -------------------------------
                                              Name:

Title:

8

Exhibit 4.2

SPECIMEN

FORM OF

7.50% Senior Note due 2011

THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A NOMINEE THEREOF. THIS NOTE MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND SUCH CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.


SPECIMEN

QUEST DIAGNOSTICS INCORPORATED

                           7.50% Senior Note due 2011

                   Unconditionally guaranteed as to payment of
                          principal of and interest by
                            the Subsidiary Guarantors

No.  0 (Specimen)                                                   $[_________]

CUSIP: 748 34L AE0

                  Quest Diagnostics Incorporated, a Delaware corporation (herein

called the "Company," which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of $[_________] on July 12, 2011 (the "Stated Maturity") (except to the extent redeemed or repaid prior to the Stated Maturity) and to pay interest thereon from June 27, 2001 or from the most recent Interest Payment Date to which interest has been paid or duly provided for semi-annually at the rate of 7.50% per annum, on January 12 and July 12, commencing with January 12, 2002, on the Stated Maturity and on any Redemption Date (each such date, an "Interest Payment Date") until the principal hereof is paid or made available for payment.

Payment of Interest. The interest so payable, and punctually paid or made available for payment, on any Interest Payment Date, will, as provided in the Indenture, be paid, in immediately available funds, to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business January 1 or July 1 (whether or not a Business Day, as defined in the Indenture), as the case may be, next preceding such Interest Payment Date (the "Regular Record Date"). Any such interest not punctually paid or duly provided for ("Defaulted Interest") will forthwith cease to be payable to the Holder on such Regular Record Date, and such Defaulted Interest, may be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on a special record date (the "Special Record Date") for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Notes not less than ten days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Place of Payment. Payment of interest on this Note will be made at the Corporate Trust Office of the Trustee or such other office or agency of the Company as may be designated for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that each installment of interest and payment of principal on this Notes may at the Company's option be paid in immediately available funds by transfer to an account maintained by the payee located in the United States. Payment of the principal of this Note on the Stated Maturity will be made against presentation of this Note at the office or agency of the Company maintained for that purpose in the Borough of Manhattan, The City of New York, in such coin or currency of the


United States of America as at the time of payment is legal tender for the payment of public and private debts.

Time of Payment. In any case where any Interest Payment Date, Redemption Date, Stated Maturity shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of the Indenture or this Note), payment of principal or interest, if any, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force and effect as if made on the Interest Payment Date, Redemption Date, or at Stated Maturity; provided that no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date, Repayment Date, or Stated Maturity, as the case may be.

Legends. The statements set forth in the restrictive legends above are an integral part of the terms of this Note and by acceptance hereof each Holder of this Note agrees to be subject to and bound by the terms and provisions set forth in such legend.

General. This Note is one of a duly authorized issue of securities (herein called the "Securities") of the Company, issued and to be issued in one or more series under an indenture, dated as of June 27, 2001, as it may be supplemented from time to time (herein called the "Indenture"), between the Company and The Bank of New York, Trustee (herein called the "Trustee", which term includes any successor trustee under the Indenture with respect to a series of which this Note is a part), to which indenture and all indentures supplemental thereto, including the supplemental indenture dated June 27, 2001 (the "Supplemental Indenture"), reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Note is one of a duly authorized series of Securities designated as "7.50 Senior Notes due 2011" (collectively, the "Notes"), initially limited in aggregate principal amount to $[_________].

Further Issuance. The Company may from time to time, without the consent of the Holders of Notes of this series, issue additional Notes (the "Additional Notes") of this series having the same ranking and the same interest rate, maturity and other terms as the Notes of this series. Any Additional Notes of this series and the Notes of this series will constitute a single series under the Indenture and all references to the Notes of this series shall include the Additional Notes unless the context otherwise requires.

Book-Entry. This Note is a Global Note representing $275,000,000 of the Notes. This Note is a "book entry" Note and is being registered in the name of Cede & Co. as nominee of The Depository Trust Company (the "Depository "), a clearing agency. Subject to the terms of the Indenture, this Note will be held by a clearing agency or its nominee, and beneficial interest will be held by beneficial owners through the book-entry facilities of such clearing agency or its nominee in minimum denominations of $1,000 and integral multiples thereof. As long as this Note is registered in the name of the Depository or its nominee, the Trustee will make payments of principal and interest on this Note by wire transfer of immediately available funds to the Depository or its nominee. Notwithstanding the above, the final payment on this Note will be made after due notice by the Trustee of the pendency of such payment and only upon presentation and surrender of this Note at its principal corporate trust office or such other

2

offices or agencies appointed by the Trustee for that purpose and such other locations provided in the Indenture.

Guarantees. This Note is entitled to the benefits of the Subsidiary Guarantees by each of the Subsidiary Guarantors of the due and punctual payment and performance of the Guarantor Obligations made in favor of the Trustee for the benefit of the Holder of this Note. Reference is hereby made to Article Sixteen of the Indenture for a statement of the respective rights, limitations of rights, duties and obligations under the Guarantees of each of the Guarantors.

Events of Default. If an Event of Default with respect to the Notes shall have occurred and be continuing, the principal of the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Maturity. The Notes of this series are not subject to any sinking fund. The Notes of this series will be redeemable at any time, at the option of the Company, in whole or from time to time in part, upon not less than 30 nor more than 60 days' prior notice, on any date prior to their maturity at a Redemption Price, calculated pursuant to the Indenture, together with accrued interest thereon, if any, to the Redemption Date (subject to the rights of holders of record on the Regular Record Date that is prior to the Redemption Date to receive interest on the relevant Interest Payment Date). In the case of any partial redemption, selection of the Notes of this series for redemption will be made by the Trustee by such methods, as the Trustee in its sole discretion shall deem fair and appropriate. If any Note is to be redeemed in part only, the notice of redemption relating to such Note shall state the portion of the principal amount thereof to be redeemed. A new Note in principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder thereof upon cancellation of this Note.

Defeasance and Covenant Defeasance. The Indenture contains provisions for defeasance at any time of (a) the entire indebtedness of the Company on this Note and (b) certain restrictive covenants and the related Defaults and Events of Default, upon compliance by the Company with certain conditions set forth therein, which provisions apply to this Note.

Modification and Waivers; Obligations of the Company Absolute. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series. Such amendment may be effected under the Indenture at any time by the Company, the Subsidiary Guarantors and the Trustee with the consent of the Holders of not less than a majority in aggregate principal amount of the Outstanding Notes of each series affected thereby. The Indenture also contains provisions permitting the Holders of not less than a majority in aggregate principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Outstanding Securities, to waive compliance by the Company with certain provisions of the Indenture. Furthermore, provisions in the Indenture permit the Holders of not less than a majority in aggregate principal amount of the Outstanding Securities of individual series to waive on behalf of all of the Holders of Securities of such individual series certain past defaults under the Indenture and their consequences. Any such consent or waiver shall be conclusive and binding upon the Holder of this Note and upon all future Holders of this Note and of any Note

3

issued upon the registration of transfer hereof or in exchange hereof or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and interest on this Note at the time, place, and rate, and in the coin or currency, herein prescribed.

Limitation on Suits. As set forth in, and subject to, the provisions of the Indenture, no Holder of any Note of this series will have any right to institute any proceeding with respect to the Indenture or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with respect to this series, the Holders of not less than 25% in principal amount of the Outstanding Notes of this series shall have made written request, and offered reasonable indemnity, to the Trustee to institute such proceedings as trustee, and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Notes of this series a direction inconsistent with such request and shall have failed to institute such proceeding within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for the enforcement of payment of the principal of or interest on this Note on or after the respective due dates expressed herein.

Authorized Denominations. The Notes of this series are issuable only in registered form without coupons in denominations of $1,000 or any integral multiple thereof.

Registration of Transfer or Exchange. As provided in the Indenture and subject to certain limitations herein and therein set forth, the transfer of this Note is registrable in the Security Register upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

As provided in the Indenture and subject to certain limitations herein and therein set forth, the Notes are exchangeable for a like aggregate principal amount of Notes of different authorized denominations, as requested by the Holders surrendering the same.

This Note is a Global Security. If the Depository is at any time unwilling, unable or ineligible to continue as depository and a successor depository is not appointed by the Company within 90 days or an Event of Default under the Indenture has occurred and is continuing, the Company will issue Securities in certificated form in exchange for each Global Security. In addition, the Company may at any time determine not to have Securities represented by a Global Security and, in such event, will issue Securities in certificated form in exchange in whole for the Global Security representing such Security. In any such instance, an owner of a beneficial interest in a Global Security will be entitled to physical delivery in certificated form of Securities equal in principal amount to such beneficial interest and to have such Securities registered in its name. Securities so issued in certificated form will be issued in denominations

4

of $1,000 or any amount in excess thereof which is an integral multiple of $1,000 and will be issued in registered form only, without coupons.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Note for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Holder as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Note shall be governed by and construed in accordance with the law of the State of New York.

5

Unless the certificate of authentication hereon has been executed by the Trustee by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

Dated:   , 2001
                                               QUEST DIAGNOSTICS INCORPORATED


                                               By:
                                                  ------------------------------
                                               Name:
Attest:                                        Title:


------------------------
Name:

Title:

6

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Notes of the series designated and referred to in the within-mentioned Indenture, as such is supplemented by the within-mentioned First Supplemental Indenture.

THE BANK OF NEW YORK
as Trustee

By
Authorized Signatory

Dated: , 2001

7

GUARANTEE OF THE INITIAL SUBSIDIARY GUARANTORS

FOR VALUE RECEIVED, each of the Initial Subsidiary Guarantors (as such term is defined in the Indenture, as amended by the First Supplemental Indenture), hereby, jointly and severally, unconditionally guarantees to the Holder of the Note upon which this Subsidiary Guarantee is endorsed (the "Note") and to the Trustee on behalf of the Holder, the prompt payment of the principal of (and premium, if any, on) and interest (including, in case of default, interest on principal and, to the extent permitted by applicable law, on overdue interest and including any additional interest required to be paid according to the terms of the Notes) on the Note, when due (whether at Stated Maturity, upon Redemption, upon acceleration, upon tender for repayment at the option of the Company), according to the terms hereof and the terms of the Indenture (the "Guarantor Obligations"). This Guarantee is a guarantee of payment and not of collection and is a continuing guarantee and shall apply to all Guarantor Obligations whenever arising.

Obligations Unconditional and Absolute. The obligations of the Initial Subsidiary Guarantors hereunder are absolute and unconditional irrespective of the value, genuineness, validity, regularity or enforceability of the Indenture or this Note, to the fullest extent permitted by applicable law, irrespective of any circumstance whatsoever which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor. Each of the Initial Subsidiary Guarantors agrees that this Guarantee may be enforced by the Holder of this Note without the necessity at any time of proceeding against the Company or any other Person (including a co-guarantor) or to pursue any other remedy or enforce any other right. Each of the Initial Guarantors further agrees that nothing contained herein shall prevent the Holder of this Note from suing on this Note or the Indenture or from exercising any other rights available under this Note and the Indenture, and the exercise of any of the aforesaid rights and shall not constitute a discharge of any Initial Subsidiary Guarantor's obligations hereunder and under the Indenture; it being the purpose and the intent of each Initial Subsidiary Guarantor that its obligations under this Note and under the Indenture shall be absolute, independent and unconditional under any and all circumstances. Neither any Initial Subsidiary Guarantor's obligations under this Guarantee nor any remedy for the enforcement thereof shall be impaired, modified, changed or released in any manner whatsoever by an impairment, modification, change, release or limitation of the liability of the Company or by reason of the bankruptcy or insolvency of the Company. Each Initial Subsidiary Guarantor waives any and all notice of the creation, renewal, extension or accrual of any of the Guarantor Obligations or acceptance of this Guarantee. The Guarantor Obligations, and any of them, shall conclusively be deemed to have been created, contracted or incurred, or renewed, extended, amended or waived, in reliance upon this Guarantee.

Subrogation. Each of the Initial Subsidiary Guarantors shall be subrogated to all rights of the Holder of the Note against the Company in respect of any amounts paid by such Initial Subsidiary Guarantor on account of the Note or the Indenture; provided, however, that such Initial Subsidiary Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (or premium, if any, on) and interest on all Notes of this series shall have been indefeasibly paid in full.

1

Modifications. Each Initial Subsidiary Guarantor agrees that
(a) the time or place of payment of the Guarantor Obligations may be changed or extended, in whole or in part, to a time certain or otherwise, and may be renewed or accelerated, in whole or in part; (b) the Company and any other party liable for payment under the Indenture or under the Note may be granted indulgences generally; (c) any of the provisions of this Note or the Indenture may be modified, amended or waived; and (d) any party (including any Subsidiary Guarantor) liable for the payment under this Note or under the Indenture may be granted indulgences or be released; all without notice to or further assent by such Initial Subsidiary Guarantor, which shall remain bound thereon, notwithstanding any such exchange, compromise, surrender, extension, renewal, acceleration, modification, indulgence or release.

Waiver of Rights. Each of the Initial Subsidiary Guarantors hereby waives to the fullest extent permitted by law: (a) notice of acceptance of this Guarantee by the Holder of this Note; (b) presentment and demand for payment or performance of any of the Guarantor Obligations; (c) protest and notice of dishonor or default with respect to the Guarantor Obligations; (d) all other notices to which such Initial Subsidiary Guarantor might otherwise be entitled.

Reinstatement. The obligations of the Initial Subsidiary Guarantors under this Note and under Article Sixteen shall be automatically reinstated if and to the extent that for any reason any payment by or on behalf of any Person in respect of the Guarantor Obligations is rescinded or must otherwise be restored by any Holder of the Notes of this series, whether as a result of any proceedings in bankruptcy or reorganization or otherwise.

Remedies. Each of the Initial Subsidiary Guarantors further agrees, to the fullest extent that it may lawfully do so, that as between each such Initial Subsidiary Guarantor, on the one hand, and the Holder and the Trustee, on the other hand, the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five of the Indenture for the purposes of this guarantee, notwithstanding any stay, injunction or other prohibition extant under any applicable bankruptcy law preventing such acceleration in respect of the obligations guaranteed hereby.

Rights of Contribution. The Initial Subsidiary Guarantors, in connection with payments made hereunder, shall have contribution rights against the other Subsidiary Guarantors as permitted under applicable law. Such contribution rights shall be subordinate and subject in right of payment to the obligations of the Subsidiary Guarantors under this Note and no Initial Subsidiary Guarantor shall exercise such rights of contribution until all Guarantor Obligations have been paid in full.

Limitation of Guaranty. Notwithstanding any provision to the contrary contained herein or in the Indenture, to the extent the obligations of any Initial Subsidiary Guarantor shall be adjudicated to be invalid or unenforceable for any reason (including, without limitation, because of any applicable state or federal law relating to fraudulent conveyances or transfers) then the obligations of the Initial Subsidiary Guarantors hereunder shall be limited to the maximum amount that is permissible under applicable law (whether federal or state or otherwise and including, without limitation, the Bankruptcy Code).

2

Release of Guarantors. Each of the Initial Subsidiary Guarantors hereby covenants that its Subsidiary Guarantee will not be discharged except by complete performance of its obligations contained in the Note, this Subsidiary Guarantee and pursuant to the Indenture; provided, however, that if
(a) an Initial Subsidiary Guarantor does not guarantee any Indebtedness of the Company the amount of which, when added together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary Guarantors, would exceed $50 million in the aggregate, excluding the Notes of this series, and all outstanding Indebtedness of such Subsidiary Guarantor would have been permitted to be incurred pursuant to Section 1011 of the Indenture measured at the time of the release and discharge as described in this paragraph, (b) the Notes of this series are defeased and discharged pursuant to Article Fourteen of the Indenture, or (c) all or substantially all of the assets of such Initial Subsidiary Guarantor or all of the capital stock of such Initial Subsidiary Guarantor is sold (including by issuance, merger, consolidation or otherwise) by the Company or any of its Subsidiaries, then in each case of (a), (b) or (c) above, such Subsidiary Guarantor or the corporation acquiring such assets (in the event of a sale or other disposition of all or substantially all of the assets or capital stock of such Subsidiary Guarantor) shall be automatically and without any further action on the part of any party to the Indenture, and upon notice to the Trustee, be fully released and discharged from all its liabilities and obligations under or in respect of the Indenture and this Subsidiary Guarantee of the Note, and promptly upon the request of the Company and at the expense of the Company, the Trustee shall execute such documents and take such other action as is reasonably requested by the Company to evidence the release and discharge of such Guarantor from all such liabilities and obligations and shall, if applicable, certify to the Company that such Initial Subsidiary Guarantor has no liabilities or obligations resulting from a demand on such Initial Subsidiary Guarantor's Guarantee.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Subsidiary Guarantee shall be governed by and construed in accordance with the law of the State of New York.

Subject to the next following paragraph, each Initial Subsidiary Guarantor hereby certifies and warrants that all acts, conditions and things required to be done and performed and to have happened precedent to the creation and issuance of this Subsidiary Guarantee and to constitute the same valid obligation of each Initial Subsidiary Guarantor have been done and performed and have happened in due compliance with all applicable laws.

(Remainder of page intentionally left blank.)

3

This Subsidiary Guarantee shall not be valid or become obligatory for any purpose until the certificate of authentication on the Note upon which this Subsidiary Guarantee is endorsed has been signed by the Trustee under the Indenture referred to in this Note.

Dated: _______________, 2001

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED

                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS CLINICAL
                                                 LABORATORIES, INC.


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS INCORPORATED
                                                 (CA)


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:

Title:

4

QUEST DIAGNOSTICS INCORPORATED
(MD)

                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS LLC


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS INCORPORATED
                                                 (MI)


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS INCORPORATED
                                                 (CT)


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:

Title:

5

QUEST DIAGNOSTICS INCORPORATED
(MA)

                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS OF PENNSYLVANIA
                                                 INC.


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               QUEST DIAGNOSTICS INCORPORATED
                                                 (OH)


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               METWEST INC.


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:

Title:

6

NICHOLS INSTITUTE DIAGNOSTICS

                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               DPD HOLDINGS, INC.


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               DIAGNOSTICS REFERENCE SERVICES
                                                 INC.


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:
Title:
                                               LABORATORY HOLDINGS INCORPORATED


                                               By:
                                                  ------------------------------
Attest:                                        Name:
                                               Title:

----------------------------
Name:

Title:

7

PATHOLOGY BUILDING PARTNERSHIP

                                               By Quest Diagnostics Incorporated
                                                 (MD) As General Partner
Attest:
                                               By:
                                                  ------------------------------
                                               Name:
----------------------------                   Title:
Name:
Title:
                                               QUEST DIAGNOSTICS
                                               INVESTMENTS INCORPORATED


Attest:                                        By:
                                                  ------------------------------
                                               Name:
                                               Title:
----------------------------
Name:
Title:                                         By:
                                                  ------------------------------
                                               Name:
                                               Title:

                                               QUEST DIAGNOSTICS
                                               FINANCE INCORPORATED


Attest:                                        By:
                                                  ------------------------------
                                               Name:
                                               Title:
----------------------------
Name:
Title:                                         By:
                                                  ------------------------------
                                               Name:

Title:

8

Exhibit 4.3


QUEST DIAGNOSTICS INCORPORATED,

as Issuer

THE SUBSIDIARY GUARANTORS NAMED HEREIN,

as Guarantors

and

THE BANK OF NEW YORK,

as Trustee

Indenture

Dated as of June 27, 2001

Providing for the Issuance

of

Senior Debt Securities



                         QUEST DIAGNOSTICS INCORPORATED
           Reconciliation and tie between Trust Indenture Act of 1939
                     and Indenture, dated as of June 27,2001



TRUST INDENTURE ACT SECTION                                                         INDENTURE SECTION
------------------------------------------------------------------------------      -----------------
Section 310(a)(1).............................................................            607
              (a)(2)..........................................................            607
              (b).............................................................            608
Section 312(c)................................................................            701
Section 314(a)................................................................            703
              (a)(4)..........................................................           1005
              (c)(1)..........................................................            102
              (c)(2)..........................................................            102
              (e).............................................................            102
Section 315(b)................................................................            601
Section 316(a) (last sentence)................................................    101 ("Outstanding")
              (a)(1)(A).......................................................         502, 512
              (a)(1)(B).......................................................            513
              (b).............................................................            508
Section 317(a)(1).............................................................            503
              (a)(2)..........................................................            504
Section 318(a)................................................................            111
              (c).............................................................            111


NOTE: This reconciliation and tie shall not, for any purpose, be deemed to be a part of the Indenture.


                                TABLE OF CONTENTS



      ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION
SECTION 101 Definitions...........................................................................................1
SECTION 102 Compliance Certificates and Opinions.................................................................10
SECTION 103 Form of Documents Delivered to Trustee...............................................................11
SECTION 104 Acts of Holders......................................................................................11
SECTION 105 Notices, Etc., to Trustee and Company................................................................13
SECTION 106 Notice to Holders; Waiver............................................................................13
SECTION 107 Effect of Headings and Table of Contents.............................................................14
SECTION 108 Successors and Assigns...............................................................................14
SECTION 109 Separability Clause..................................................................................14
SECTION 110 Benefits of Indenture................................................................................14
SECTION 111 Governing Law........................................................................................15
SECTION 112 Legal Holidays.......................................................................................15
SECTION 113 Conflict of Any Provision of Indenture with Trust Indenture Act......................................15
SECTION 114 No Recourse against Others...........................................................................15
SECTION 115 Waiver of Trial by Jury..............................................................................15

                          ARTICLE TWO SECURITIES FORMS

SECTION 201 Forms of Securities..................................................................................16
SECTION 202 Form of Trustee's Certificate of Authentication......................................................16
SECTION 203 Securities Issuable in Global Form...................................................................16
SECTION 204 Form of Legend for Book-Entry Securities.............................................................17

                          ARTICLE THREE THE SECURITIES

SECTION 301 Amount Unlimited; Issuable in Series.................................................................18
SECTION 302 Denominations........................................................................................22
SECTION 303 Execution, Authentication, Delivery and Dating.......................................................22
SECTION 304 Temporary Securities.................................................................................24
SECTION 305 Registration, Registration of Transfer and Exchange..................................................27
SECTION 306 Mutilated, Destroyed, Lost and Stolen Securities.....................................................30
SECTION 307 Payment of Interest; Interest Rights Preserved; Optional Interest Reset..............................31
SECTION 308 Optional Extension of Maturity.......................................................................34
SECTION 309 Persons Deemed Owners................................................................................35
SECTION 310 Cancellation.........................................................................................36
SECTION 311 Computation of Interest..............................................................................36
SECTION 312 Currency and Manner of Payments in Respect of Securities.............................................36
SECTION 313 Appointment and Resignation of Successor Exchange Rate Agent.........................................40
SECTION 314 CUSIP Numbers........................................................................................40

i

                     ARTICLE FOUR SATISFACTION AND DISCHARGE
SECTION 401 Satisfaction and Discharge of Indenture..............................................................41
SECTION 402 Application of Trust Funds...........................................................................42

                              ARTICLE FIVE REMEDIES

SECTION 501 Events of Default....................................................................................42
SECTION 502 Acceleration of Maturity; Rescission and Annulment...................................................44
SECTION 503 Collection of Indebtedness and Suits for Enforcement by Trustee......................................45
SECTION 504 Trustee May File Proofs of Claim.....................................................................46
SECTION 505 Trustee May Enforce Claims Without Possession of Securities or Coupons...............................46
SECTION 506 Application of Money Collected.......................................................................47
SECTION 507 Limitation on Suits..................................................................................47
SECTION 508 Unconditional Right of Holders to Receive Principal, Premium and Interest and Additional
                      Amounts, if Any............................................................................48
SECTION 509 Restoration of Rights and Remedies...................................................................48
SECTION 510 Rights and Remedies Cumulative.......................................................................48
SECTION 511 Delay or Omission Not Waiver.........................................................................48
SECTION 512 Control by Holders of Securities.....................................................................49
SECTION 513 Undertaking for Costs................................................................................49
SECTION 514 Waiver of Past Defaults..............................................................................49
SECTION 515 Waiver of Usury, Stay or Extension Laws..............................................................50

                             ARTICLE SIX THE TRUSTEE

SECTION 601 Notice of Defaults...................................................................................50
SECTION 602 Certain Rights of Trustee............................................................................50
SECTION 603 Not Responsible for Recitals or Issuance of Securities...............................................52
SECTION 604 May Hold Securities..................................................................................52
SECTION 605 Money Held in Trust..................................................................................53
SECTION 606 Compensation and Reimbursement.......................................................................53
SECTION 607 Corporate Trustee Required; Eligibility..............................................................53
SECTION 608 Resignation and Removal; Appointment of Successor....................................................54
SECTION 609 Acceptance of Appointment by Successor...............................................................55
SECTION 610 Merger, Conversion, Consolidation or Succession to Business..........................................56
SECTION 611 Appointment of Authenticating Agent..................................................................56
SECTION 612 Conflicting Interests................................................................................58
SECTION 613 Appointment of Co-Trustee............................................................................58
SECTION 614 Trustee's Application for Instructions from the Company..............................................59

         ARTICLE SEVEN HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701 Disclosure of Names and Addresses of Holders.........................................................60
SECTION 702 Reports by Trustee...................................................................................60
SECTION 703 Reports by Company and Subsidiary Guarantors.........................................................61

ii

SECTION 704 Calculation of Original Issue Discount...............................................................61

           ARTICLE EIGHT CONSOLIDATION, MERGER, CONVEYANCE OR TRANSFER

SECTION 801 Company May Consolidate, Etc., Only on Certain Terms.................................................62
SECTION 802 Successor Person Substituted.........................................................................62
SECTION 803 Officers' Certificate and Opinion of Counsel.........................................................63

                      ARTICLE NINE SUPPLEMENTAL INDENTURES

SECTION 901 Supplemental Indentures Without Consent of Holders...................................................63
SECTION 902 Supplemental Indentures with Consent of Holders......................................................65
SECTION 903 Execution of Supplemental Indentures.................................................................66
SECTION 904 Effect of Supplemental Indentures....................................................................66
SECTION 905 Conformity with Trust Indenture Act..................................................................66
SECTION 906 Reference in Securities to Supplemental Indentures...................................................66

                              ARTICLE TEN COVENANTS

SECTION 1001 Payment of Principal, Premium, if any, and Interest.................................................67
SECTION 1002 Maintenance of Office or Agency.....................................................................67
SECTION 1003 Money for Securities Payments to be Held in Trust...................................................69
SECTION 1004 Corporate Existence.................................................................................70
SECTION 1005 Additional Amounts..................................................................................70
SECTION 1006 Statement as to Compliance..........................................................................71
SECTION 1007 Waiver of Certain Covenants.........................................................................71

                     ARTICLE ELEVEN REDEMPTION OF SECURITIES

SECTION 1101 Applicability of Article............................................................................71
SECTION 1102 Election to Redeem; Notice to Trustee...............................................................72
SECTION 1103 Selection by Trustee of Securities to be Redeemed...................................................72
SECTION 1104 Notice of Redemption................................................................................72
SECTION 1105 Deposit of Redemption Price.........................................................................74
SECTION 1106 Securities Payable on Redemption Date...............................................................74
SECTION 1107 Securities Redeemed in Part.........................................................................75

                          ARTICLE TWELVE SINKING FUNDS

SECTION 1201 Applicability of Article............................................................................75
SECTION 1202 Satisfaction of Sinking Fund Payments with Securities...............................................75
SECTION 1203 Redemption of Securities for Sinking Fund...........................................................76

               ARTICLE THIRTEEN REPAYMENT AT THE OPTION OF HOLDERS

SECTION 1301 Applicability of Article............................................................................76
SECTION 1302 Repayment of Securities.............................................................................76
SECTION 1303 Exercise of Option..................................................................................77

iii

SECTION 1304 When Securities Presented for Repayment Become Due and Payable......................................77
SECTION 1305 Securities Repaid in Part...........................................................................78

               ARTICLE FOURTEEN DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1401 Applicability of Article; Company's Option to Effect Defeasance or Covenant Defeasance..............79
SECTION 1402 Defeasance and Discharge............................................................................79
SECTION 1403 Covenant Defeasance.................................................................................80
SECTION 1404 Conditions to Defeasance or Covenant Defeasance.....................................................80
SECTION 1405 Deposited Money and Government Obligations to Be Held in Trust; Other Miscellaneous
                      Provisions.................................................................................82

                ARTICLE FIFTEEN MEETINGS OF HOLDERS OF SECURITIES

SECTION 1501 Purposes for Which Meetings May Be Called...........................................................83
SECTION 1502 Call, Notice and Place of Meetings..................................................................83
SECTION 1503 Persons Entitled to Vote at Meetings................................................................83
SECTION 1504 Quorum; Action......................................................................................83
SECTION 1505 Determination of Voting Rights; Conduct and Adjournment of Meetings.................................84
SECTION 1506 Counting Votes and Recording Action of Meetings.....................................................85

                           ARTICLE SIXTEEN GUARANTEES

SECTION 1601 Guarantees..........................................................................................86
SECTION 1602 Execution and Delivery of Guarantees................................................................87
SECTION 1603 Limitation of Guarantor's Liability.................................................................88

EXHIBIT A - FORMS OF CERTIFICATES

iv

INDENTURE, dated as of June 27, 2001, between QUEST DIAGNOSTICS INCORPORATED, a Delaware corporation (hereinafter called the "Company"), having its principal office at One Malcolm Avenue, Teterboro, New Jersey 07608, each of the Subsidiary Guarantors (as hereinafter defined) and THE BANK OF NEW YORK, a New York banking corporation, as Trustee (hereinafter called the "Trustee").

RECITALS OF THE COMPANY AND SUBSIDIARY GUARANTORS

WHEREAS, the Company deems it necessary to issue from time to time for its lawful purposes senior debt securities (hereinafter called the "Securities") evidencing its unsecured and unsubordinated indebtedness, which may or may not be convertible into or exchangeable for any securities of any Person (including the Company) and which may or may not be guaranteed by the Subsidiary Guarantors, and has duly authorized the execution and delivery of this Indenture to provide for the issuance from time to time of the Securities, to be issued in one or more series, unlimited as to principal amount, to bear such rates of interest, to mature at such times and to have such other provisions as provided in this Indenture;

WHEREAS, this Indenture is subject to the provisions of the Trust Indenture Act of 1939, as amended, that are required to be part of this Indenture and shall, to the extent applicable, be governed by such provisions; and

WHEREAS, all things necessary to make this Indenture a valid agreement of the Company and each Subsidiary Guarantor, in accordance with its terms, have been done;

NOW, THEREFORE, THIS INDENTURE WITNESSETH:

For and in consideration of the premises and the purchase of the Securities by the Holders thereof, it is mutually covenanted and agreed, for the equal and proportionate benefit of all Holders of the Securities and coupons, or of a series thereof, as follows:

ARTICLE ONE

DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101 Definitions.

For all purposes of this Indenture, except as otherwise expressly provided or unless the context otherwise requires or unless such definition is changed or amended in a supplement or amendment to this Indenture:

(1) the terms defined in this Article have the meanings assigned to them in this Article, and include the plural as well as the singular;

(2) all other terms used herein which are defined in the TIA, either directly or by reference therein, have the meanings assigned to them therein, and the terms "cash transaction" and "self-liquidating paper", as used in TIA Section 311, shall have the meanings assigned to them in the rules of the Commission adopted under the TIA;


(3) all accounting terms not otherwise defined herein have the meanings assigned to them in accordance with accounting principles generally accepted in the United States; and

(4) the words "herein", "hereof" and "hereunder" and other words of similar import refer to this Indenture as a whole and not to any particular Article, Section or other subdivision.

Certain terms, used principally in Article Three, Article Five and Article Six are defined in those Articles.

"Act", when used with respect to any Holder, has the meaning specified in Section 104.

"Additional Amounts" means any additional amounts which are required by a Security or by or pursuant to a Board Resolution, under circumstances specified therein, to be paid by the Company in respect of certain taxes imposed on certain Holders and which are owing to such Holders.

"Affiliate" of any specified Person means any other Person directly or indirectly controlling or controlled by or under direct or indirect common control with such specified Person. For the purposes of this definition, "control" when used with respect to any specified Person means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms "controlling" and "controlled" have meanings correlative to the foregoing.

"Authenticating Agent" means any authenticating agent appointed by the Trustee pursuant to Section 611.

"Authorized Newspaper" means a newspaper, in the English language or in an official language of the country of publication, customarily published on each Business Day, whether or not published on Saturdays, Sundays or holidays, and of general circulation in each place in connection with which the term is used or in the financial community of each such place. Where successive publications are required to be made in Authorized Newspapers, the successive publications may be made in the same or in different newspapers in the same city meeting the foregoing requirements and in each case on any Business Day.

"Bearer Security" means any Security established pursuant to
Section 201 which is payable to bearer.

"Board of Directors" means the board of directors of the Company or any Subsidiary Guarantor, as the case may be, or the executive committee or any committee of that board duly authorized to act hereunder.

"Board Resolution" means a copy of a resolution certified by the Secretary or an Assistant Secretary of the Company or any Subsidiary Guarantor, as the case may be, to have been duly adopted by the Board of Directors and to be in full force and effect on the date of such certification, and delivered to the Trustee.

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"Business Day", when used with respect to any Place of Payment or any other particular location referred to in this Indenture or in the Securities, means, unless otherwise specified with respect to any Securities pursuant to Section 301, each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in that Place of Payment or particular location are authorized or obligated by law or executive order to close.

"Clearstream" means Clearstream Banking societe anonyme or its successor.

"Commission" means the Securities and Exchange Commission, as from time to time constituted, created under the Exchange Act, or, if at any time after execution of this Indenture such Commission is not existing and performing the duties now assigned to it under the TIA, then the body performing such duties at such time.

"Company" means the Person named as the "Company" in the first paragraph of this Indenture until a successor corporation shall have become such pursuant to the applicable provisions of this Indenture, and thereafter.

"Company" shall mean such successor corporation.

"Company Request" and "Company Order" mean, respectively, a written request or order signed in the name of the Company by the Chairman, the President or a Vice President, and by the Treasurer, an Assistant Treasurer, the Comptroller or an Assistant Comptroller, the Secretary or an Assistant Secretary, of the Company, and delivered to the Trustee.

"Conversion Date" has the meaning specified in Section 312(d).

"Conversion Event" means the cessation of use of (i) a Foreign Currency both by the government of the country which issued such currency and for the settlement of transactions by a central bank or other public institutions of or within the international banking community, (ii) the euro for the settlement of transactions by public institutions of or within the European Communities or (iii) any currency unit (or composite currency) other than the euro for the purposes for which the euro was established.

"Corporate Trust Office" means the office of the Trustee at which, at any particular time, its corporate trust business shall be principally administered, which office at the date hereof is located at 101 Barclay Street, New York, New York 10286, Attn: Corporate Trust - Trustee Administration.

"Corporation" includes corporations, associations, limited liability companies, companies and business trusts.

"Coupon" means any interest coupon appertaining to a Bearer Security.

"Currency" means any currency or currencies, composite currency or currency unit or currency units, including, without limitation, the euro, issued by the government of one or more countries or by any reorganized confederation or association of such governments.

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"Default" means any event which is, or after notice or passage of time or both would be, an Event of Default.

"Defaulted Interest" has the meaning specified in Section 307.

"Depository Participant" means, with respect to the Depositary Trust Company (the "Depository") or its nominee, an institution that has an account therewith.

"Dollar" or "$" means a dollar or other equivalent unit in such coin or currency of the United States of America as at the time shall be legal tender for the payment of public and private debts.

"Election Date" has the meaning specified in Section 312(h).

"Euroclear" means Morgan Guaranty Trust Company of New York, Brussels Office, or its successor as operator of the Euroclear System.

"European Communities" means the European Union, the European Coal and Steel Community and the European Atomic Energy Community.

"Event of Default" has the meaning specified in Article Five.

"Exchange Act" means the Securities Exchange Act of 1934, as amended.

"Exchange Rate Agent", with respect to Securities of or within any series, means, unless otherwise specified with respect to any Securities pursuant to Section 301, a New York Clearing House bank designated pursuant to
Section 301 or Section 313.

"Exchange Rate Officer's Certificate" means a certificate setting forth (i) the applicable Market Exchange Rate or the applicable bid quotation and (ii) the Dollar or Foreign Currency amounts of principal (and premium, if any) and interest, if any (on an aggregate basis and on the basis of a Security having the lowest denomination principal amount determined in accordance with Section 302 in the relevant currency or currency unit), payable with respect to a Security of any series on the basis of such Market Exchange Rate or the applicable bid quotation signed by the Treasurer, any Vice President or any Assistant Treasurer of the Company.

"Foreign Currency" means any Currency, including, without limitation, the euro, issued by the government of one or more countries other than the United States of America or by any recognized confederation or association of such governments.

"Government Obligations" means securities which are (i) direct obligations of the United States of America or the government which issued the Foreign Currency in which the Securities of a particular series are payable, for the payment of which its full faith and credit is pledged or (ii) obligations of a Person controlled or supervised by and acting as an agency or instrumentality of the United States of America or such government which issued the Foreign Currency in which the Securities of such series are payable, the payment of which is unconditionally guaranteed as a full faith and credit obligation by the United States of America or such other government, which, in either case, are not callable or redeemable at the option of

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the issuer thereof, and shall also include a depository receipt issued by a bank or trust company as custodian with respect to any such Government Obligation or a specific payment of interest on or principal of any such Government Obligation held by such custodian for the account of the holder of a depository receipt; provided that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such depository receipt from any amount received by the custodian in respect of the Government Obligation or the specific payment of interest on or principal of the Government Obligation evidenced by such depository receipt.

"Holder" means, in the case of a Registered Security, the Person in whose name a Security is registered in the Security Register and, in the case of a Bearer Security, the bearer thereof and, when used with respect to any coupon, shall mean the bearer thereof.

"Indenture" means this instrument as originally executed or as it may from time to time be supplemented or amended by one or more indentures supplemental hereto entered into pursuant to the applicable provisions hereof, and shall include the terms of particular series of Securities established as contemplated by Section 301; provided, however, that, if at any time more than one Person is acting as Trustee under this instrument, "Indenture" shall mean, with respect to any one or more series of Securities for which such Person is Trustee, this instrument as originally executed or as it may from time to time be supplemented or amended by one or more indentures supplemental hereto entered into pursuant to the applicable provisions hereof and shall include the terms of the or those particular series of Securities for which such Person is Trustee established as contemplated by Section 301, exclusive, however, of any provisions or terms which relate solely to other series of Securities for which such Person is not Trustee, regardless of when such terms or provisions were adopted, and exclusive of any provisions or terms adopted by means of one or more indentures supplemental hereto executed and delivered after such Person had become such Trustee but to which such Person, as such Trustee, was not a party.

"Indexed Security" means a Security as to which all or certain interest payments and/or the principal amount payable at Maturity are determined by reference to prices, changes in prices, or differences between prices, of securities, Currencies, intangibles, goods, articles or commodities or by such other objective price, economic or other measures as are specified in Section 301 hereof.

"Interest", when used with respect to an Original Issue Discount Security which by its terms bears interest only after Maturity, shall mean interest payable after Maturity, and, when used with respect to a Security which provides for the payment of Additional Amounts pursuant to Section 1004 or otherwise, includes such Additional Amounts.

"Interest Payment Date", when used with respect to any Security, means the Stated Maturity of an installment of interest on such Security.

"Market Exchange Rate" means, unless otherwise specified with respect to any Securities pursuant to Section 301, (i) for any conversion involving a currency unit on the one hand and Dollars or any Foreign Currency on the other, the exchange rate between the relevant currency unit and Dollars or such Foreign Currency calculated by the method specified pursuant

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to Section 301 for the Securities of the relevant series, (ii) for any conversion of Dollars into any Foreign Currency, the noon buying rate for such Foreign Currency for cable transfers quoted in New York City as certified for customs purposes by the Federal Reserve Bank of New York and (iii) for any conversion of one Foreign Currency into Dollars or another Foreign Currency, the spot rate at noon local time in the relevant market at which, in accordance with normal banking procedures, the Dollars or Foreign Currency into which conversion is being made could be purchased with the Foreign Currency from which conversion is being made from major banks located in either New York City, London or any other principal market for Dollars or such purchased Foreign Currency, in each case determined by the Exchange Rate Agent. Unless otherwise specified with respect to any Securities pursuant to Section 301, in the event of the unavailability of any of the exchange rates provided for in the foregoing clauses (i), (ii) and (iii), the Exchange Rate Agent shall use, in its sole discretion and without liability on its part, such quotation of the Federal Reserve Bank of New York as of the most recent available date, or quotations from one or more major banks in New York City, London or other principal market for such currency or currency unit in question, or such other quotations as the Exchange Rate Agent shall deem appropriate. Unless otherwise specified by the Exchange Rate Agent, if there is more than one market for dealing in any currency or currency unit by reason of foreign exchange regulations or otherwise, the market to be used in respect of such currency or currency unit shall be that upon which a nonresident issuer of securities designated in such currency or currency unit would purchase such currency or currency unit in order to make payments in respect of such securities.

"Maturity", when used with respect to any Security, means the date on which the principal of such Security or an installment of principal becomes due and payable as therein or herein provided, whether at the Stated Maturity or by declaration of acceleration, notice of redemption, notice of option to elect repayment, notice of exchange or conversion or otherwise.

"Officers' Certificate" means a certificate signed by the Chairman, the President or any Vice President and by the Treasurer, an Assistant Treasurer, the Comptroller or an Assistant Comptroller, the Secretary or an Assistant Secretary of the Company or any Subsidiary Guarantor, as the case may be, and delivered to the Trustee.

"Opinion of Counsel" means a written opinion of counsel, who may be counsel for the Company or any Subsidiary Guarantor or who may be an employee of or other counsel for the Company or any Subsidiary Guarantor satisfactory to the Trustee.

"Original Issue Discount Security" means any Security which provides for an amount less than the principal amount thereof to be due and payable upon a declaration of acceleration of the Maturity thereof pursuant to
Section 502.

"Outstanding", when used with respect to Securities or any series of any Securities, means, as of the date of determination, all Securities or all Securities of such series, as the case may be, theretofore authenticated and delivered under this Indenture, except:

(A) Securities theretofore cancelled by the Trustee or delivered to the Trustee for cancellation;

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(B) Securities, or portions thereof, for whose payment or redemption or repayment at the option of the Holder money in the necessary amount has been theretofore deposited with the Trustee or any Paying Agent (other than the Company or any Subsidiary Guarantor) in trust or set aside and segregated in trust by the Company or a Subsidiary Guarantor (if the Company or such Subsidiary Guarantor shall act as Paying Agent) for the Holders of such Securities and any coupons appertaining thereto, provided that, if such Securities are to be redeemed, notice of such redemption has been duly given pursuant to this Indenture or provision therefor satisfactory to the Trustee has been made;

(C) Securities, except to the extent provided in Sections 1402 and 1403, with respect to which the Company has effected defeasance and/or covenant defeasance as provided in Article Fourteen; and

(D) Securities which have been paid pursuant to Section 306 or in exchange for or in lieu of which other Securities have been authenticated and delivered pursuant to this Indenture, other than any such Securities in respect of which there shall have been presented to the Trustee proof satisfactory to it that such Securities are held by a bona fide purchaser in whose hands such Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite principal amount of the Outstanding Securities have given any request, demand, authorization, direction, notice, consent or waiver hereunder or are present at a meeting of Holders for quorum purposes, and for the purpose of making the calculations required by TIA Section 313, (i) the principal amount of an Original Issue Discount Security that may be counted in making such determination or calculation and that shall be deemed to be Outstanding for such purpose shall be equal to the amount of principal thereof that would be (or shall have been declared to be) due and payable, at the time of such determination, upon a declaration of acceleration of the Maturity thereof pursuant to Section 502, (ii) the principal amount of any Security denominated in a Foreign Currency that may be counted in making such determination or calculation and that shall be deemed Outstanding for such purpose shall be equal to the Dollar equivalent, determined as of the date such Security is originally issued by the Company as set forth in an Exchange Rate Officer's Certificate delivered to the Trustee, of the principal amount (or, in the case of an Original Issue Discount Security or Indexed Security, the Dollar equivalent as of such date of original issuance of the amount determined as provided in clause
(i) above or (iii) below, respectively) of such Security, (iii) the principal amount of any Indexed Security that may be counted in making such determination or calculation and that shall be deemed outstanding for such purpose shall be equal to the principal face amount of such Indexed Security at original issuance, unless otherwise provided with respect to such Security pursuant to
Section 301, and (iv) Securities owned by the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor shall be disregarded and deemed not to be Outstanding, except that, in determining whether the Trustee shall be protected in making such calculation or in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Securities which the Trustee actually knows to be so owned shall be so disregarded. Securities so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee's right so to act with respect to such Securities and that the pledgee is not the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor.

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"Paying Agent" means any Person authorized by the Company to pay the principal of (or premium, if any) or interest, if any, on any Securities or coupons on behalf of the Company.

"Person" means any individual, corporation, partnership, limited liability company, joint venture, association, joint-stock company, trust, unincorporated organization or government or any agency or political subdivision thereof.

"Place of Payment", when used with respect to the Securities of or within any series, means the place or places where the principal of (and premium, if any) and interest, if any, on such Securities are payable as specified and as contemplated by Sections 301 and 1002.

"Predecessor Security" of any particular Security means every previous Security evidencing all or a portion of the same debt as that evidenced by such particular Security; and, for the purposes of this definition, any Security authenticated and delivered under Section 306 in exchange for or in lieu of a mutilated, destroyed, lost or stolen Security or a Security to which a mutilated, destroyed, lost or stolen coupon appertains shall be deemed to evidence the same debt as the mutilated, destroyed, lost or stolen Security or the Security to which the mutilated, destroyed, lost or stolen coupon appertains.

"Redemption Date", when used with respect to any Security to be redeemed, in whole or in part, means the date fixed for such redemption by or pursuant to this Indenture.

"Redemption Price", when used with respect to any Security to be redeemed, means the price at which it is to be redeemed pursuant to this Indenture.

"Registered Security" shall mean any Security which is registered in the Security Register.

"Regular Record Date" for the interest payable on any Interest Payment Date on the Registered Securities of or within any series means the date specified for that purpose as contemplated by Section 301, whether or not a Business Day.

"Repayment Date" means, when used with respect to any Security to be repaid at the option of the Holder, the date fixed for such repayment by or pursuant to this Indenture.

"Repayment Price" means, when used with respect to any Security to be repaid at the option of the Holder, the price at which it is to be repaid by or pursuant to this Indenture.

"Responsible Officer" shall mean, when used with respect to the Trustee, any officer within the corporate trust department of the Trustee, including any vice president, assistant vice president, assistant secretary, assistant treasurer, trust officer or any other officer of the Trustee who customarily performs functions similar to those performed by the Persons who at the time shall be such officers, respectively, or to whom any corporate trust matter is referred because of such person's knowledge of and familiarity with the particular subject and who shall have direct responsibility for the administration of this Indenture.

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"Security" or "Securities" has the meaning stated in the first recital of this Indenture and, more particularly, means any Security or Securities authenticated and delivered under this Indenture; provided, however, that, if at any time there is more than one Person acting as Trustee under this Indenture, "Securities" with respect to the Indenture as to which such Person is Trustee shall have the meaning stated in the first recital of this Indenture and shall more particularly mean Securities authenticated and delivered under this Indenture, exclusive, however, of Securities of any series as to which such Person is not Trustee. Where applicable, references in this Indenture to "Security" or "Securities" in respect of which Subsidiary Guarantees have been issued and are Outstanding will include such Subsidiary Guarantees.

"Security Register" and "Security Registrar" have the respective meanings specified in Section 305.

"Special Record Date" for the payment of any Defaulted Interest on the Registered Securities of or within any series means a date fixed by the Trustee pursuant to Section 307.

"Stated Maturity", when used with respect to any Security or any installment of principal thereof or interest thereon, means the date specified in such Security or a coupon representing such installment of interest as the fixed date on which the principal of such Security or such installment of principal or interest is due and payable, as such date may be extended pursuant to the provisions of Section 308.

"Subsidiary" means any corporation a majority of the outstanding voting stock of which is owned, directly or indirectly, by the Company or by one or more other Subsidiaries of the Company. For the purposes of this definition, "voting stock" means stock having voting power for the election of directors, managers or trustees of any Person (whether or not, at the time, stock of any other class or classes shall have, or might have, voting power by reason of the happening of any contingency).

"Subsidiary Guarantees" means, with respect to the Securities of any series, the guarantees with respect to the Securities of such Series by a Subsidiary Guarantor pursuant to Article Thirteen hereof or a supplemental indenture thereto.

"Subsidiary Guarantor" means, with respect to the Securities of any series, Quest Diagnostics Holdings Incorporated, Quest Diagnostics Clinical Laboratories, Inc., Quest Diagnostics Incorporated (CA), Quest Diagnostics Incorporated (MD), Quest Diagnostics LLC, Quest Diagnostics Incorporated (MI), Quest Diagnostics Incorporated (CT), Quest Diagnostics Incorporated (MA), Quest Diagnostics of Pennsylvania Inc., Quest Diagnostics Incorporated (OH), Metwest Inc., Nichols Institute Diagnostics, DPD Holdings, Inc., Diagnostics Reference Services Inc, Laboratory Holdings Incorporated , Quest Diagnostics Finance Incorporated, Quest Diagnostics Investments Incorporated, Pathology Building Partnership and any other Subsidiary of the Company that provides a Subsidiary Guarantee with respect to the Securities of such series pursuant to a supplemental indenture thereto.

"Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939 as in force at the date as of which this Indenture was executed, except as provided in Section 905.

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"Trustee" means the Person named as the "Trustee" in the first paragraph of this Indenture until a successor Trustee shall have become such pursuant to the applicable provisions of this Indenture, and thereafter "Trustee" shall mean or include each Person who is then a Trustee hereunder; provided, however, that if at any time there is more than one such Person, "Trustee" as used with respect to the Securities of any series shall mean only the Trustee with respect to Securities of that series.

"United States" means, unless otherwise specified with respect to any Securities pursuant to Section 301, the United States of America (including the states and the District of Columbia), its territories, its possessions and other areas subject to its jurisdiction.

"United States Person" means, unless otherwise specified with respect to any Securities pursuant to Section 301, an individual who is a citizen or resident of the United States, a corporation, partnership or other entity created or organized in or under the laws of the United States or an estate or trust the income of which is subject to United States federal income taxation regardless of its source.

"Valuation Date" has the meaning specified in Section 312(c).

"Yield to Maturity" means the yield to maturity, computed at the time of issuance of a Security (or, if applicable, at the most recent redetermination of interest on such Security) and as set forth in such Security in accordance with generally accepted United States bond yield computation principles.

SECTION 102 Compliance Certificates and Opinions.

Upon any application or request by the Company or any Subsidiary Guarantor to the Trustee to take any action under any provision of this Indenture, the Company or such Subsidiary Guarantor, as the case may be, shall furnish to the Trustee an Officers' Certificate stating that all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with and an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent, if any, have been complied with, except that in the case of any such application or request as to which the furnishing of such documents is specifically required by any provision of this Indenture relating to such particular application or request, no additional certificate or opinion need be furnished.

Every certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture (other than pursuant to
Section 1005) shall include:

(1) a statement that each individual signing such certificate or opinion has read such condition or covenant and the definitions herein relating thereto;

(2) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based;

(3) a statement that, in the opinion of each such individual, he has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such condition or covenant has been complied with; and

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(4) a statement as to whether, in the opinion of each such individual, such condition or covenant has been complied with.

SECTION 103 Form of Documents Delivered to Trustee.

In any case where several matters are required to be certified by, or covered by an opinion of, any specified Person, it is not necessary that all such matters be certified by, or covered by the opinion of, only one such Person, or that they be so certified or covered by only one document, but one such Person may certify or give an opinion as to some matters and one or more other such Persons as to other matters, and any such Person may certify or give an opinion as to such matters in one or several documents.

Any certificate or opinion of an officer of the Company or any Subsidiary Guarantor may be based, insofar as it relates to legal matters, upon an Opinion of Counsel, or a certificate or representations by counsel, unless such officer knows, or in the exercise of reasonable care should know, that the opinion, certificate or representations with respect to the matters upon which his certificate or opinion is based are erroneous. Any such Opinion of Counsel or certificate or representations may be based, insofar as it relates to factual matters, upon a certificate or opinion of, or representations by, an officer or officers of the Company or such Subsidiary Guarantor, as the case may be, stating that the information as to such factual matters is in the possession of the Company or such Subsidiary Guarantor, as the case may be, unless such counsel knows, or in the exercise of reasonable care should know, that the certificate or opinion or representations as to such matters are erroneous.

Where any Person is required to make, give or execute two or more applications, requests, consents, certificates, statements, opinions or other instruments under this Indenture, they may, but need not, be consolidated and form one instrument.

SECTION 104 Acts of Holders.

(a) Any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be given or taken by Holders of the Outstanding Securities of all series or one or more series, as the case may be, may be embodied in and evidenced by one or more instruments of substantially similar tenor signed (which may be electronically signed) by such Holders in person or by agents duly appointed in writing. If Securities of a series are issuable as Bearer Securities, any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be given or taken by Holders of Securities of such series may, alternatively, be embodied in and evidenced by the record of Holders of Securities of such series voting in favor thereof, either in person or by proxies duly appointed in writing, at any meeting of Holders of Securities of such series duly called and held in accordance with the provisions of Article Fifteen, or a combination of such instruments and any such record. Except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments or record or both are delivered to the Trustee and, where it is hereby expressly required, to the Company or the Subsidiary Guarantors or to all of them. Such instrument or instruments and any such record (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the "Act" of the Holders signing such instrument or instruments or so voting at any such meeting. Proof of execution of any such instrument or of a

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writing appointing any such agent, or of the holding by any Person of a Security, shall be sufficient for any purpose of this Indenture and conclusive in favor of the Trustee and the Company and any agent of the Trustee or the Company, if made in the manner provided in this Section. The record of any meeting of Holders of Securities shall be proved in the manner provided in
Section 1506.

(b) The fact and date of the execution of any such instrument or writing, or the authority of the Person executing the same, may be proved in any manner which the Trustee deems reasonably sufficient.

(c) The ownership of Registered Securities shall be proved by the Security Register.

(d) The ownership of Bearer Securities may be proved by the production of such Bearer Securities or by a certificate executed, as depositary, by any trust company, bank, banker or other depositary, wherever situated, if such certificate shall be deemed by the Trustee to be satisfactory, showing that at the date therein mentioned such Person had on deposit with such depositary, or exhibited to it, the Bearer Securities therein described; or such facts may be proved by the certificate or affidavit of the Person holding such Bearer Securities, if such certificate or affidavit is deemed by the Trustee to be satisfactory. The Trustee, the Company and the Subsidiary Guarantors may assume that such ownership of any Bearer Security continues until (1) another certificate or affidavit bearing a later date issued in respect of the same Bearer Security is produced, or (2) such Bearer Security is produced to the Trustee by some other Person, or (3) such Bearer Security is surrendered in exchange for a Registered Security, or (4) such Bearer Security is no longer Outstanding. The ownership of Bearer Securities may also be proved in any other manner that the Trustee deems sufficient.

(e) If the Company or any Subsidiary Guarantor shall solicit from the Holders of Registered Securities any request, demand, authorization, direction, notice, consent, waiver or other Act, the Company or such Subsidiary Guarantor, as the case may be, may, at its option, in or pursuant to a Board Resolution, fix in advance a record date for the determination of Holders entitled to give such request, demand, authorization, direction, notice, consent, waiver or other Act, but the Company or such Subsidiary Guarantor, as the case may be, shall have no obligation to do so. Notwithstanding TIA Section
316(c), such record date shall be the record date specified in or pursuant to such Board Resolution, which shall be a date not earlier than the date 30 days prior to the first solicitation of Holders generally in connection therewith and not later than the date such solicitation is completed. If such a record date is fixed, such request, demand, authorization, direction, notice, consent, waiver or other Act may be given before or after such record date, but only the Holders of record at the close of business on such record date shall be deemed to be Holders for the purposes of determining whether Holders of the requisite proportion of Outstanding Securities have authorized or agreed or consented to such request, demand, authorization, direction, notice, consent, waiver or other Act, and for that purpose the Outstanding Securities shall be computed as of such record date; provided that no such authorization, agreement or consent by the Holders on such record date shall be deemed effective unless it shall become effective pursuant to the provisions of this Indenture not later than 180 days after the record date.

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(f) Any request, demand, authorization, direction, notice, consent, waiver or other Act of the Holder of any Security shall bind every future Holder of the same Security and the Holder of every Security issued upon the registration of transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be done by the Trustee, any Security Registrar, any Paying Agent, any Authenticating Agent, the Company or any Subsidiary Guarantor in reliance thereon, whether or not notation of such action is made upon such Security.

SECTION 105 Notices, Etc., to Trustee and Company.

Any request, demand, authorization, direction, notice, consent, waiver or Act of Holders or other document provided or permitted by this Indenture to be made upon, given or furnished to, or filed with, (1) the Trustee by any Holder or by the Company or any Subsidiary Guarantor shall be sufficient for every purpose hereunder if made, given, furnished or filed in writing to or with the Trustee at its Corporate Trust Office, Attention:
Corporate Trust Administration, or at any other address previously furnished in writing by the Trustee to the Holders or the Company or such Subsidiary Guarantor or (2) the Company or any Subsidiary Guarantor by the Trustee or by any Holder shall be sufficient for every purpose hereunder (unless otherwise herein expressly provided) if in writing and mailed, given, furnished or filed with or to the Company or such Subsidiary Guarantor addressed to it at the address of the Company's principal office specified in the first paragraph of this Indenture or at any other address previously furnished in writing to the Trustee by the Company or such Subsidiary Guarantor.

SECTION 106 Notice to Holders; Waiver.

Where this Indenture provides for notice of any event to Holders of Registered Securities by the Company, the Subsidiary Guarantors or the Trustee, such notice shall be sufficiently given (unless otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, or by email, to each such Holder affected by such event, at his physical address or email address as such address appears in the Security Register, not later than the latest date, and not earlier than the earliest date, prescribed for the giving of such notice. In any case where notice to Holders of Registered Securities is given by mail, neither the failure to mail such notice, nor any defect in any notice so mailed, to any particular Holder shall affect the sufficiency of such notice with respect to other Holders of Registered Securities or the sufficiency of any notice to Holders of Bearer Securities given as provided herein. Any notice mailed to a Holder in the manner herein prescribed shall be conclusively deemed to have been received by such Holder, whether or not such Holder actually receives such notice.

If by reason of the suspension of or irregularities in regular mail service or by reason of any other cause it shall be impracticable to give such notice by mail, then such notification to Holders of Registered Securities as shall be made with the approval of the Trustee shall constitute a sufficient notification to such Holders for every purpose hereunder.

Except as otherwise expressly provided herein or otherwise specified with respect to any Securities pursuant to Section 301, where this Indenture provides for notice to Holders of Bearer Securities of any event, such notice shall be sufficiently given if published in (1) an Authorized Newspaper in The City of New York and in such other city or cities as may be

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specified in such Securities on a Business Day, or (2) an electronic medium easily accessible by the Holders as may be specified to such Holders, such publication to be not later than the latest date, and not earlier than the earliest date, prescribed for the giving of such notice. Any such notice shall be deemed to have been given on the date of such publication or, if published more than once, on the date of the first such publication.

If by reason of the suspension of publication of any Authorized Newspaper or Authorized Newspapers or by reason of any other cause it shall be impracticable to publish any notice to Holders of Bearer Securities as provided above, then such notification to Holders of Bearer Securities as shall be given with the approval of the Trustee shall constitute sufficient notice to such Holders for every purpose hereunder. Neither the failure to give notice by publication to Holders of Bearer Securities as provided above, nor any defect in any notice so published, shall affect the sufficiency of such notice with respect to other Holders of Bearer Securities or the sufficiency of any notice to Holders of Registered Securities given as provided herein.

Any request, demand, authorization, direction, notice, consent or waiver required or permitted under this Indenture shall be in the English language, except that any published notice may be in an official language of the country of publication.

Where this Indenture provides for notice in any manner, such notice may be waived in writing by the Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Trustee, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver.

SECTION 107 Effect of Headings and Table of Contents.

The Article and Section headings herein and the Table of Contents are for convenience only and shall not affect the construction hereof.

SECTION 108 Successors and Assigns.

All covenants and agreements in this Indenture by the Company or any Subsidiary Guarantor shall bind its successors and assigns, whether so expressed or not.

SECTION 109 Separability Clause.

In case any provision in this Indenture or in any Security, any Subsidiary Guarantee or coupon shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

SECTION 110 Benefits of Indenture.

Nothing in this Indenture or in the Securities, the Subsidiary Guarantees or coupons, express or implied, shall give to any Person, other than the parties hereto, any Security Registrar, any Paying Agent, any Authenticating Agent and their successors hereunder and the Holders any benefit or any legal or equitable right, remedy or claim under this Indenture.

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SECTION 111 Governing Law.

This Indenture, the Securities, the Subsidiary Guarantees and coupons shall be governed by and construed in accordance with the laws of the State of New York, without regard to principles of conflicts of laws. This Indenture is subject to the provisions of the Trust Indenture Act that are required to be part of this Indenture and shall, to the extent applicable, be governed by such provisions.

SECTION 112 Legal Holidays.

In any case where any Interest Payment Date, Redemption Date, Repayment Date, sinking fund payment date, Stated Maturity or Maturity of any Security shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of this Indenture or any Security or coupon other than a provision in the Securities of any series which specifically states that such provision shall apply in lieu of this Section), payment of principal (or premium, if any) or interest, if any, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force and effect as if made on the Interest Payment Date, Redemption Date, Repayment Date or sinking fund payment date, or at the Stated Maturity or Maturity; provided that no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date, Repayment Date, sinking fund payment date, Stated Maturity or Maturity, as the case may be.

SECTION 113 Conflict of Any Provision of Indenture with Trust Indenture Act.

If and to the extent that any provision of this Indenture limits, qualifies or conflicts with the duties imposed by TIA Sections 310 to 318, inclusive, or conflicts with any provision (an "incorporated provision") required by or deemed to be included in this Indenture by operation of such TIA Sections or any section of the TIA, such imposed duties or incorporated provisions shall control. If any provision of this Indenture modifies or excludes any provision of the TIA that may be so modified or excluded, the latter provision shall be deemed to apply to this Indenture as so modified or excluded, as the case may be.

SECTION 114 No Recourse against Others.

A director, officer, employee or stockholder, as such, of the Company or any Subsidiary Guarantor shall not have any liability for any obligations of the Company or such Subsidiary Guarantor under the Securities, the Subsidiary Guarantees, if any, or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. Each Holder by accepting any of the Securities and the Subsidiary Guarantees waives and releases all such liability.

SECTION 115 Waiver of Trial by Jury.

The Company, the Subsidiary Guarantors, the Trustee, and Holders hereby irrevocably and unconditionally waive the right to trial by jury in connection with any claim arising out of or relating to the Securities and under this Indenture.

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ARTICLE TWO

SECURITIES FORMS

SECTION 201 Forms of Securities.

The Registered Securities, if any, of each series, the Bearer Securities, if any, of each series and related coupons shall be in substantially the forms as shall be established in one or more indentures supplemental hereto or approved from time to time by or pursuant to a Board Resolution in accordance with Section 301, shall have such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture or any indenture supplemental hereto, and may have such letters, numbers or other marks of identification or designation and such legends or endorsements placed thereon as the Company or the Subsidiary Guarantors, as the case may be, may deem appropriate and as are not inconsistent with the provisions of this Indenture, or as may be required to comply with any law or with any rule or regulation made pursuant thereto or with any rule or regulation of any stock exchange on which the Securities may be listed, or to conform to usage.

Unless otherwise specified as contemplated by Section 301, Bearer Securities shall have interest coupons attached.

The definitive Securities and coupons shall be printed, lithographed or engraved or produced by any combination of these methods on a steel engraved border or steel engraved borders or may be produced in any other manner, all as determined by the officers executing such Securities or coupons, as evidenced by their execution of such Securities or coupons.

SECTION 202 Form of Trustee's Certificate of Authentication.

Subject to Section 611, the Trustee's certificate of authentication shall be in substantially the following form:

This is one of the Securities of the series designated herein and referred to in the within-mentioned Indenture.

THE BANK OF NEW YORK
as Trustee

By
Authorized Signatory

SECTION 203 Securities Issuable in Global Form.

If Securities of or within a series are issuable in global form, as specified as contemplated by Section 301, then, notwithstanding clause
(8) of Section 301 and the provisions of Section 302, any such Security shall represent such of the Outstanding Securities of such series as shall be specified therein and may provide that it shall represent the aggregate amount of Outstanding Securities of such series from time to time endorsed thereon and that the

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aggregate amount of Outstanding Securities of such series represented thereby may from time to time be increased or decreased to reflect exchanges. Any endorsement of a Security in global form to reflect the amount, or any increase or decrease in the amount, of Outstanding Securities represented thereby shall be made by the Trustee in such manner and upon instructions given by such Person or Persons as shall be specified therein or in the Company Order to be delivered to the Trustee pursuant to Section 303 or 304. Subject to the provisions of
Section 303 and, if applicable, Section 304, the Trustee shall deliver and redeliver any Security in permanent global form in the manner and upon instructions given by the Person or Persons specified therein or in the applicable Company Order. If a Company Order pursuant to Section 303 or 304 has been, or simultaneously is, delivered, any instructions by the Company with respect to endorsement, delivery or redelivery of a Security in global form shall be in writing but need not comply with Section 102 and need not be accompanied by an Opinion of Counsel.

The provisions of the last sentence of Section 303 shall apply to any Security represented by a Security in global form if such Security was never issued and sold by the Company and the Company delivers to the Trustee the Security in global form together with written instructions (which need not comply with Section 102 and need not be accompanied by an Opinion of Counsel) with regard to the reduction in the principal amount of Securities represented thereby, together with the written statement contemplated by the last sentence of Section 303.

Notwithstanding the provisions of Section 307, unless otherwise specified as contemplated by Section 301, payment of principal of (and premium, if any) and interest, if any, on any Security in permanent global form shall be made to the Person or Persons specified therein.

Notwithstanding the provisions of Section 309 and except as provided in the preceding paragraph, the Company, the Subsidiary Guarantors, the Trustee and any agent of the Company, the Subsidiary Guarantors and the Trustee shall treat as the Holder of such principal amount of Outstanding Securities represented by a permanent global Security (i) in the case of a permanent global Security in registered form, the Holder of such permanent global Security in registered form, or (ii) in the case of a permanent global Security in bearer form, Euroclear or Clearstream.

SECTION 204 Form of Legend for Book-Entry Securities.

Any Global Security authenticated and delivered hereunder shall bear a legend (which would be in addition to any other legends required in the case of a restricted Security) in substantially the following form:

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH

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DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED
IN THE INDENTURE.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND SUCH CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

ARTICLE THREE

THE SECURITIES

SECTION 301 Amount Unlimited; Issuable in Series.

The aggregate principal amount of Securities which may be authenticated and delivered under this Indenture is unlimited.

The Securities shall rank equally and pari passu and may be issued in one or more series. There shall be established in one or more Board Resolutions or pursuant to authority granted by one or more Board Resolutions and, subject to Section 303, set forth, or determined in the manner provided, in an Officers' Certificate, or established in one or more indentures supplemental hereto, prior to the issuance of Securities of any series, any or all of the following, as applicable (each of which (except for the matters set forth in clauses (1), (2) and (15) below), if so provided, may be determined from time to time by the Company with respect to unissued Securities of the series when issued from time to time):

(1) the title of the Securities of the series (which shall distinguish the Securities of such series from all other series of Securities);

(2) any limit upon the aggregate principal amount of the Securities of the series that may be authenticated and delivered under this Indenture (except for Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities of the series pursuant to Section 304, 305, 306, 906, 1107 or 1305) and whether any series may be reopened for additional Securities of that series; in the event that such series of Securities may be reopened from time to time for issuances of additional Securities of such series, the terms thereof shall indicate whether any such additional Securities shall have the same terms as the prior Securities of such series or whether the Company may establish additional or different terms with respect to such additional Securities;

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(3) the date or dates, or the method by which such date or dates will be determined or extended, on which the principal (and premium, if any,) of the Securities of the series shall be payable;

(4) the rate or rates at which the Securities of the series shall bear interest, if any, or the method by which such rate or rates shall be determined, the date or dates from which such interest shall accrue or the method by which such date or dates shall be determined, the Interest Payment Dates on which such interest will be payable and the Regular Record Date, if any, for the interest payable on any Registered Security on any Interest Payment Date, or the method by which such date shall be determined, and the basis upon which such interest shall be calculated if other than that of a 360-day year of twelve 30-day months;

(5) the place or places, if any, other than or in addition to the Borough of Manhattan, The City of New York, where the principal of (and premium, if any) and interest, if any, on Securities of the series shall be payable, any Registered Securities of the series may be surrendered for registration of transfer and exchange, Securities of the series may be surrendered for exchange, where Securities of that series that are convertible or exchangeable may be surrendered for conversion or exchange, as applicable, and where notices or demands to or upon the Company or, if applicable, the Subsidiary Guarantors in respect of the Securities of the series and this Indenture may be served;

(6) the period or periods within which, or the date or dates on which, the price or prices at which, the Currency or Currencies in which, and other terms and conditions upon which Securities of the series may be redeemed, in whole or in part, at the option of the Company, if the Company is to have the option;

(7) the obligation, if any, of the Company to redeem, repay or purchase Securities of the series pursuant to any sinking fund or analogous provision or at the option of a Holder thereof, and the period or periods within which or the date or dates on which, the price or prices at which, the Currency or Currencies in which, and other terms and conditions upon which Securities of the series shall be redeemed, repaid or purchased, in whole or in part, pursuant to such obligation;

(8) if other than denominations of $1,000 and any integral multiple thereof, the denomination or denominations in which any Registered Securities of the series shall be issuable and, if other than denominations of $5,000, the denomination or denominations in which any Bearer Securities of the series shall be issuable;

(9) if other than the Trustee, the identity of each Security Registrar and/or Paying Agent;

(10) if other than the principal amount thereof, the portion of the principal amount of Securities of the series that shall be payable upon declaration of acceleration of the Maturity thereof pursuant to Section 502 or the method by which such portion shall be determined;

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(11) if other than Dollars, the Currency or Currencies in which payment of the principal of (or premium, if any) or interest, if any, on the Securities of the series shall be made or in which the Securities of the series shall be denominated and the particular provisions applicable thereto in accordance with, in addition to or in lieu of any of the provisions of Section 312;

(12) whether the amount of payments of principal of (or premium, if any) or interest, if any, on the Securities of the series may be determined with reference to an index, formula or other method (which index, formula or method may be based, without limitation, on one or more Currencies, commodities, equity indices or other indices), and the manner in which such amounts shall be determined;

(13) whether the principal of (or premium, if any) or interest, if any, on the Securities of the series are to be payable, at the election of the Company or a Holder thereof, in one or more Currencies other than that in which such Securities are denominated or stated to be payable, the period or periods within which (including the Election Date), and the terms and conditions upon which, such election may be made, and the time and manner of determining the exchange rate between the Currency or Currencies in which such Securities are denominated or stated to be payable and the Currency or Currencies in which such Securities are to be paid, in each case in accordance with, in addition to or in lieu of any of the provisions of Section 312;

(14) provisions, if any, granting special rights to the Holders of Securities of the series upon the occurrence of such events as may be specified;

(15) any deletions from, modifications of or additions to the Events of Default or covenants or other provisions (including any deletions from, modifications of or additions to any of the provisions of Section 1007) of the Company with respect to Securities of the series, whether or not such Events of Default or covenants or other provisions are consistent with the Events of Default or covenants or other provisions set forth herein;

(16) whether Securities of the series are to be issuable as Registered Securities, Bearer Securities or both, any restrictions applicable to the offer, sale or delivery of Bearer Securities and the terms upon which Bearer Securities of the series may be exchanged for Registered Securities of the series and vice versa (if permitted by applicable laws and regulations), whether any Securities of the series are to be issuable initially in temporary global form and whether any Securities of the series are to be issuable in permanent global form with or without coupons and, if so, whether beneficial owners of interests in any such permanent global Security may exchange such interests for Securities of such series in certificated form and of like tenor of any authorized form and denomination and the circumstances under which any such exchanges may occur, if other than in the manner provided in Section 305, and, if Registered Securities of the series are to be issuable as a global Security, the identity of the depository for such series;

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(17) the date as of which any Bearer Securities of the series and any temporary global Security representing Outstanding Securities of the series shall be dated if other than the date of original issuance of the first Security of the series to be issued;

(18) the Person to whom any interest on any Registered Security of the series shall be payable, if other than the Person in whose name such Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, the manner in which, or the Person to whom, any interest on any Bearer Security of the series shall be payable, if otherwise than upon presentation and surrender of the coupons appertaining thereto as they severally mature, and the extent to which, or the manner in which, any interest payable on a temporary global Security on an Interest Payment Date will be paid if other than in the manner provided in
Section 304;

(19) the applicability, if any, of Sections 1402 and 1403 to the Securities of the series (and, in the case of Section 1403, if applicable, any additional covenants subject to covenant defeasance) and any provisions in modification of, in addition to or in lieu of any of the provisions of Article Fourteen;

(20) if the Securities of such series are to be issuable in definitive form (whether upon original issue or upon exchange of a temporary Security of such series) only upon receipt of certain certificates or other documents or satisfaction of other conditions, then the form and/or terms of such certificates, documents or conditions;

(21) whether, under what circumstances and the Currency in which, the Company will pay Additional Amounts as contemplated by
Section 1005 on the Securities of the series to any Holder who is not a United States person (including any modification to the definition of such term) in respect of any tax, assessment or governmental charge and, if so, whether the Company will have the option to redeem such Securities rather than pay such Additional Amounts (and the terms of any such option);

(22) the designation of the initial Exchange Rate Agent, if any;

(23) if the Securities of the series are to be convertible into or exchangeable for any securities of any Person (including the Company), the terms and conditions upon which such Securities of the series will be so convertible or exchangeable (including, without limitation, the initial conversion price or rate, the conversion period, the conversion agent, if any, adjustments of the applicable conversion price or rate and any requirements with respect to the reservation of shares or Securities for purposes of conversion);

(24) whether payment of any amounts due hereunder will be guaranteed by one or more guarantors, including subsidiaries of the Company; and

(25) any other terms of the series (which terms shall not be inconsistent with the requirements of the TIA).

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All Securities of any one series and the coupons appertaining to any Bearer Securities of such series shall be substantially identical except, in the case of Registered Securities, as to denomination and except as may otherwise be provided in or pursuant to such Board Resolution (subject to
Section 303) and set forth in such Officers' Certificate or in any such indenture supplemental hereto. All Securities of any one series need not be issued at the same time and, unless otherwise provided, a series may be reopened, without the consent of the Holders, for issuances of additional Securities of such series or to establish additional terms of such series of Securities (which additional terms shall only be applicable to unissued or additional Securities of such series).

If any of the terms of the Securities of any series are established by action taken pursuant to one or more Board Resolutions, a copy of an appropriate record of such action(s) shall be certified by the Secretary or an Assistant Secretary of the Company and delivered to the Trustee at or prior to the delivery of the Officers' Certificate setting forth the terms of the Securities of such series.

SECTION 302 Denominations.

The Securities of each series shall be issuable in such denominations as shall be specified as contemplated by Section 301. In the absence of any such provision with respect to Securities of any series, the principal, premium and interest and Additional Amounts with respect to the Securities shall be payable in Dollars. With respect to Securities of any series denominated in Dollars, in the absence of any such provisions with respect to the Securities of any series, the Registered Securities of such series, other than Registered Securities issued in global form (which may be of any denomination) shall be issuable in denominations of $1,000 and any integral multiple thereof, and the Bearer Securities of such series, other than Bearer Securities issued in global form (which may be of any denomination), shall be issuable in a denomination of $5,000.

SECTION 303 Execution, Authentication, Delivery and Dating.

The Securities and any coupons appertaining thereto shall be executed on behalf of the Company by its Chairman, its President or one of its Vice Presidents, under its corporate seal reproduced thereon or a facsimile or copy thereof and attested by its Secretary or one of its Assistant Secretaries. The signature of any of these officers on the Securities and coupons may be manual or facsimile signatures of the present or any future such authorized officer and may be imprinted or otherwise reproduced on the Securities.

Securities or coupons bearing the manual or facsimile signatures of individuals who were at any time the proper officers of the Company shall bind the Company, notwithstanding that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of such Securities or did not hold such offices at the date of such Securities or coupons.

At any time and from time to time after the execution and delivery of this Indenture, the Company may deliver Securities of any series, together with any coupon appertaining thereto, executed by the Company, to the Trustee for authentication, together with a

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Company Order for the authentication and delivery of such Securities, and the Trustee in accordance with the Company Order shall authenticate and deliver such Securities; either to the Company or according to the directions contained in the Company Order; provided, however, that, in connection with its original issuance, no Bearer Security shall be mailed or otherwise delivered to any location in the United States; and provided further that, unless otherwise specified with respect to any series of Securities pursuant to Section 301, a Bearer Security may be delivered in connection with its original issuance only if the Person entitled to receive such Bearer Security shall have furnished a certificate in the form set forth in Exhibit A-1 to this Indenture or such other certificate as may be specified with respect to any series of Securities pursuant to Section 301, dated no earlier than 15 days prior to the earlier of the date on which such Bearer Security is delivered and the date on which any temporary Security first becomes exchangeable for such Bearer Security in accordance with the terms of such temporary Security and this Indenture. If any Security shall be represented by a permanent global Bearer Security, then, for purposes of this Section and Section 304, the notation of a beneficial owner's interest therein upon original issuance of such Security or upon exchange of a portion of a temporary global Security shall be deemed to be delivery in connection with its original issuance of such beneficial owner's interest in such permanent global Security. Except as permitted by Section 306, the Trustee shall not authenticate and deliver any Bearer Security unless all appurtenant coupons for interest then matured have been detached and cancelled. If all the Securities of any series are not to be issued at one time and if the Board Resolution or supplemental indenture establishing such series shall so permit, such Company Order may set forth procedures acceptable to the Trustee for the issuance of such Securities and determining the terms of particular Securities of such series, such as interest rate, maturity date, date of issuance and date from which interest shall accrue. In authenticating such Securities, and accepting the additional responsibilities under this Indenture in relation to such Securities, the Trustee shall be entitled to receive, and (subject to TIA Sections 315(a) through 315(d)) shall be fully protected in relying upon,

(A) an Opinion of Counsel stating,

(a) that the form or forms of such Securities and any coupons have been established in conformity with the provisions of this Indenture;

(b) that the terms of such Securities and any coupons have been established in conformity with the provisions of this Indenture; and

(c) that such Securities, together with any coupons appertaining thereto, when completed by appropriate insertions and executed and delivered by the Company to the Trustee for authentication in accordance with this Indenture, authenticated and delivered by the Trustee in accordance with this Indenture and issued by the Company in the manner and subject to any conditions specified in such Opinion of Counsel, will constitute legal, valid and binding obligations of the Company, enforceable in accordance with their terms, subject to applicable bankruptcy, insolvency, reorganization and other similar laws of general applicability relating to or affecting the enforcement of creditors' rights, to general equitable principles and to such other qualifications as such counsel shall

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conclude do not materially affect the rights of Holders of such Securities and any coupons;

(B) an Officers' Certificate stating, to the best of the knowledge of the signers of such certificate, that no Event of Default with respect to any of the Securities shall have occurred and be continuing; and

(C) an executed supplemental indenture (if any).

Notwithstanding the provisions of Section 301 and of this
Section 303, if all the Securities of any series are not to be issued at one time, it shall not be necessary to deliver an Officers' Certificate otherwise required pursuant to Section 301 or the Company Order, Opinion of Counsel or Officers' Certificate otherwise required pursuant to the preceding paragraph at the time of issuance of each Security of such series, but such order, opinion and certificates, with appropriate modifications to cover such future issuances, shall be delivered at or before the time of issuance of the first Security of such series.

If such form or terms have been so established, the Trustee shall not be required to authenticate such Securities if the issue of such Securities pursuant to this Indenture will affect the Trustee's own rights, duties, obligations or immunities under the Securities and this Indenture or otherwise in a manner which is not reasonably acceptable to the Trustee. Notwithstanding the generality of the foregoing, the Trustee will not be required to authenticate Securities denominated in a Foreign Currency if the Trustee reasonably believes that it would be unable to perform its duties with respect to such Securities.

Each Registered Security shall be dated the date of its authentication and each Bearer Security shall be dated as of the date specified as contemplated by Section 301.

No Security or coupon shall be entitled to any benefit under this Indenture or be valid or obligatory for any purpose unless there appears on such Security or Security to which such coupon appertains a certificate of authentication substantially in the form provided for herein duly executed by the Trustee or an Authenticating Agent by manual signature of an authorized signatory, and such certificate upon any Security shall be conclusive evidence, and the only evidence, that such Security has been duly authenticated and delivered hereunder and is entitled to the benefits of this Indenture. Notwithstanding the foregoing, if any Security shall have been authenticated and delivered hereunder but never issued and sold by the Company, and the Company shall deliver such Security to the Trustee for cancellation as provided in
Section 310 together with a written statement (which need not comply with
Section 102 and need not be accompanied by an Opinion of Counsel) stating that such Security has never been issued and sold by the Company, for all purposes of this Indenture such Security shall be deemed never to have been authenticated and delivered hereunder and shall never be entitled to the benefits of this Indenture.

SECTION 304 Temporary Securities.

(a) Pending the preparation of definitive Securities of any series, the Company may execute, and upon Company Order the Trustee shall authenticate and deliver, temporary Securities which are printed, lithographed, typewritten, mimeographed or otherwise produced, in

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any authorized denomination, substantially of the tenor of the definitive Securities in lieu of which they are issued, in registered form, or, if authorized, in bearer form with one or more coupons or without coupons, and with such appropriate insertions, omissions, substitutions and other variations as the officers executing such Securities may determine, as conclusively evidenced by their execution of such Securities. In the case of Securities of any series, such temporary Securities may be in global form.

Except in the case of temporary Securities in global form (which shall be exchanged in accordance with Section 304(b) or as otherwise provided in or pursuant to a Board Resolution), if temporary Securities of any series are issued, the Company will cause definitive Securities of that series to be prepared without unreasonable delay. After the preparation of definitive Securities of such series, the temporary Securities of such series shall be exchangeable for definitive Securities of such series upon surrender of the temporary Securities of such series at the office or agency of the Company in a Place of Payment for that series, without charge to the Holder. Upon surrender for cancellation of any one or more temporary Securities of any series (accompanied by any non-matured coupons appertaining thereto), the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor a like principal amount of definitive Securities of the same series of authorized denominations; provided, however, that no definitive Bearer Security shall be delivered in exchange for a temporary Registered Security; and provided further that a definitive Bearer Security shall be delivered in exchange for a temporary Bearer Security only in compliance with the conditions set forth in Section 303. Until so exchanged, the temporary Securities of any series shall in all respects be entitled to the same benefits under this Indenture as definitive Securities of such series.

(b) Unless otherwise provided in or pursuant to a Board Resolution, this Section 304(b) shall govern the exchange of temporary Securities issued in global form. If temporary Securities of any series are issued in global form, any such temporary global Security shall, unless otherwise provided therein, be delivered to the London office of a depositary or common depositary (the "Common Depositary"), for the benefit of Euroclear and Clearstream, for credit to the respective accounts of the beneficial owners of such Securities (or to such other accounts as they may direct).

Without unnecessary delay but in any event not later than the date specified in, or determined pursuant to the terms of, any such temporary global Security (the "Exchange Date"), the Company shall deliver to the Trustee definitive Securities, in aggregate principal amount equal to the principal amount of such temporary global Security, executed by the Company. On or after the Exchange Date, such temporary global Security shall be surrendered by the Common Depositary to the Trustee, as the Company's agent for such purpose, to be exchanged, in whole or from time to time in part, for definitive Securities without charge, and the Trustee shall authenticate and deliver, in exchange for each portion of such temporary global Security and upon receipt of the Company Order described in Section 303, an equal aggregate principal amount of definitive Securities of the same series of authorized denominations and of like tenor as the portion of such temporary global Security to be exchanged. The definitive Securities to be delivered in exchange for any such temporary global Security shall be in bearer form, registered form, permanent global bearer form or permanent global registered form, or any combination thereof, as specified as contemplated by Section 301, and, if any combination thereof is so specified, as requested by the beneficial owner thereof; provided, however, that, unless otherwise

25

specified in such temporary global Security, upon such presentation by the Common Depositary, such temporary global Security is accompanied by a certificate dated the Exchange Date or a subsequent date and signed by Euroclear as to the portion of such temporary global Security held for its account then to be exchanged and a certificate dated the Exchange Date or a subsequent date and signed by Clearstream as to the portion of such temporary global Security held for its account then to be exchanged, each in the form set forth in Exhibit A-2 to this Indenture or in such other form as may be established pursuant to
Section 301; and provided further that definitive Bearer Securities shall be delivered in exchange for a portion of a temporary global Security only in compliance with the requirements of Section 303.

Unless otherwise specified in such temporary global Security, the interest of a beneficial owner of Securities of a series in a temporary global Security shall be exchanged for definitive Securities of the same series and of like tenor following the Exchange Date when the account holder instructs Euroclear or Clearstream, as the case may be, to request such exchange on his behalf and delivers to Euroclear or Clearstream, as the case may be, a certificate in the form set forth in Exhibit A-1 to this Indenture (or in such other form as may be established pursuant to Section 301), dated no earlier than 15 days prior to the Exchange Date, copies of which certificate shall be available from the offices of Euroclear and Clearstream, the Trustee, any Authenticating Agent appointed for such series of Securities and each Paying Agent. Unless otherwise specified in such temporary global Security, any such exchange shall be made free of charge to the beneficial owners of such temporary global Security, except that a Person receiving definitive Securities must bear the cost of insurance, postage, transportation and the like unless such Person takes delivery of such definitive Securities in person at the offices of Euroclear or Clearstream. Definitive Securities in bearer form to be delivered in exchange for any portion of a temporary global Security shall be delivered only outside the United States.

Until exchanged in full as hereinabove provided, the temporary Securities of any series shall in all respects be entitled to the same benefits under this Indenture as definitive Securities of the same series and of like tenor authenticated and delivered hereunder, except that, unless otherwise specified as contemplated by Section 301, interest payable on a temporary global Security on an Interest Payment Date for Securities of such series occurring prior to the applicable Exchange Date shall be payable to Euroclear and Clearstream on such Interest Payment Date upon delivery by Euroclear and Clearstream to the Trustee of a certificate or certificates in the form set forth in Exhibit A-2 to this Indenture (or in such other forms as may be established pursuant to Section 301), for credit without further interest on or after such Interest Payment Date to the respective accounts of Persons who are the beneficial owners of such temporary global Security on such Interest Payment Date and who have each delivered to Euroclear or Clearstream, as the case may be, a certificate dated no earlier than 15 days prior to the Interest Payment Date occurring prior to such Exchange Date in the form set forth as Exhibit A-1 to this Indenture (or in such other forms as may be established pursuant to
Section 301). Notwithstanding anything to the contrary herein contained, the certifications made pursuant to this paragraph shall satisfy the certification requirements of the preceding two paragraphs of this Section 304(b) and of the third paragraph of Section 303 of this Indenture and the interests of the Persons who are the beneficial owners of the temporary global Security with respect to which such certification was made will be exchanged for definitive Securities of the same series and of like tenor on the Exchange Date or the date of certification if such date occurs after the Exchange Date, without further act or deed by such beneficial owners. Except as otherwise provided in this

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paragraph, no payments of principal (or premium, if any) or interest, if any, owing with respect to a beneficial interest in a temporary global Security will be made unless and until such interest in such temporary global Security shall have been exchanged for an interest in a definitive Security. Any interest so received by Euroclear and Clearstream and not paid as herein provided shall be returned to the Trustee prior to the expiration of two years after such Interest Payment Date in order to be repaid to the Company.

SECTION 305 Registration, Registration of Transfer and Exchange.

The Company shall cause to be kept at the Corporate Trust Office of the Trustee or in any office or agency of the Company in a Place of Payment a register for each series of Securities (the registers maintained in such office or in any such office or agency of the Company in a Place of Payment being herein sometimes referred to collectively as the "Security Register") in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Registered Securities and of transfers of Registered Securities. The Security Register shall be in written form or any other form capable of being converted into written form within a reasonable time. The Trustee, at its Corporate Trust Office, is hereby initially appointed "Security Registrar" for the purpose of registering Registered Securities and transfers of Registered Securities on such Security Register as herein provided. In the event that the Trustee shall cease to be Security Registrar, it shall have the right to examine the Security Register at all reasonable times.

Upon surrender for registration of transfer of any Registered Security of any series at any office or agency of the Company in a Place of Payment for that series, the Company shall execute, and the Trustee shall authenticate and deliver, subject to the terms and conditions of this Article 3, in the name of the designated transferee or transferees, one or more new Registered Securities of the same series, of any authorized denominations and of a like aggregate principal amount, bearing a number not contemporaneously outstanding and containing identical terms and provisions.

At the option of the Holder, Registered Securities of any series may be exchanged for other Registered Securities of the same series, of any authorized denomination or denominations and of a like aggregate principal amount, containing identical terms and provisions, upon surrender of the Registered Securities to be exchanged at any such office or agency. Whenever any Registered Securities are so surrendered for exchange, the Company shall execute, and the Trustee shall authenticate and deliver, the Registered Securities which the Holder making the exchange is entitled to receive. Unless otherwise specified with respect to any series of Securities as contemplated by
Section 301, Bearer Securities may not be issued in exchange for Registered Securities.

If (but only if) permitted by the applicable Board Resolution and (subject to Section 303) set forth in the applicable Officers' Certificate, or in any indenture supplemental hereto, delivered as contemplated by Section 301, at the option of the Holder, Bearer Securities of any series may be exchanged for Registered Securities of the same series of any authorized denominations and of a like aggregate principal amount and tenor, upon surrender of the Bearer Securities to be exchanged at any such office or agency, with all unmatured coupons and all matured coupons in default thereto appertaining. If the Holder of a Bearer Security is unable to

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produce any such unmatured coupon or coupons or matured coupon or coupons in default, any such permitted exchange may be effected if the Bearer Securities are accompanied by payment in funds acceptable to the Company in an amount equal to the face amount of such missing coupon or coupons, or the surrender of such missing coupon or coupons may be waived by the Company and the Trustee if there is furnished to them such security or indemnity as they may require to save each of them and any Paying Agent harmless. If thereafter the Holder of such Security shall surrender to any Paying Agent any such missing coupon in respect of which such a payment shall have been made, such Holder shall be entitled to receive the amount of such payment; provided, however, that, except as otherwise provided in Section 1002, interest represented by coupons shall be payable only upon presentation and surrender of those coupons at an office or agency located outside the United States. Notwithstanding the foregoing, in case a Bearer Security of any series is surrendered at any such office or agency in a permitted exchange for a Registered Security of the same series and like tenor after the close of business at such office or agency on (i) any Regular Record Date and before the opening of business at such office or agency on the relevant Interest Payment Date, or (ii) any Special Record Date and before the opening of business at such office or agency on the related proposed date for payment of Defaulted Interest, such Bearer Security shall be surrendered without the coupon relating to such Interest Payment Date or proposed date for payment, as the case may be, and interest or Defaulted Interest, as the case may be, will not be payable on such Interest Payment Date or proposed date for payment, as the case may be, in respect of the Registered Security issued in exchange for such Bearer Security, but will be payable only to the Holder of such coupon when due in accordance with the provisions of this Indenture.

Whenever any Securities are so surrendered for exchange, the Company shall execute, and the Trustee shall authenticate and deliver, the Securities which the Holder making the exchange is entitled to receive.

Notwithstanding the foregoing, except as otherwise specified as contemplated by Section 301, any permanent global Security shall be exchangeable only as provided in this paragraph. If any beneficial owner of an interest in a permanent global Security is entitled to exchange such interest for Securities of such series and of like tenor and principal amount of another authorized form and denomination, as specified as contemplated by Section 301 and provided that any applicable notice provided in the permanent global Security shall have been given, then without unnecessary delay but in any event not later than the earliest date on which such interest may be so exchanged, the Company shall deliver to the Trustee definitive Securities in aggregate principal amount equal to the principal amount of such beneficial owner's interest in such permanent global Security, executed by the Company. On or after the earliest date on which such interests may be so exchanged, such permanent global Security shall be surrendered by the Common Depositary or such other depositary as shall be specified in the Company Order with respect thereto to the Trustee, as the Company's agent for such purpose, to be exchanged, in whole or from time to time in part, for definitive Securities without charge and the Trustee shall authenticate and deliver, in exchange for each portion of such permanent global Security, an equal aggregate principal amount of definitive Securities of the same series of authorized denominations and of like tenor as the portion of such permanent global Security to be exchanged which, unless the Securities of the series are not issuable both as Bearer Securities and as Registered Securities, as specified as contemplated by Section 301, shall be in the form of Bearer Securities or Registered Securities, or any combination thereof, as shall be specified by

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the beneficial owner thereof; provided, however, that no such exchanges may occur during a period beginning at the opening of business 15 days before any selection of Securities to be redeemed and ending on the relevant Redemption Date if the Security for which exchange is requested may be among those selected for redemption; and provided further that no Bearer Security delivered in exchange for a portion of a permanent global Security shall be mailed or otherwise delivered to any location in the United States. If a Registered Security is issued in exchange for any portion of a permanent global Security after the close of business at the office or agency where such exchange occurs on (i) any Regular Record Date and before the opening of business at such office or agency on the relevant Interest Payment Date, or (ii) any Special Record Date and before the opening of business at such office or agency on the related proposed date for payment of Defaulted Interest, interest or Defaulted Interest, as the case may be, will not be payable on such Interest Payment Date or proposed date for payment, as the case may be, in respect of such Registered Security, but will be payable on such Interest Payment Date or proposed date for payment, as the case may be, only to the Person to whom interest in respect of such portion of such permanent global Security is payable in accordance with the provisions of this Indenture.

All Securities issued upon any registration of transfer or exchange of Securities shall be valid obligations of the Company, evidencing the same debt and entitled to the same benefits under this Indenture, as the Securities surrendered upon such registration of transfer or exchange.

Every Registered Security presented or surrendered for registration of transfer or for exchange shall (if so required by the Company or the Security Registrar) be duly endorsed, or be accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar, duly executed by the Holder thereof or his attorney duly authorized in writing.

No service charge shall be made for any registration of transfer or exchange of Securities, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any registration of transfer or exchange of Securities, other than exchanges pursuant to Section 304, 906, 1107 or 1305 not involving any transfer.

The Company shall not be required (i) to issue, register the transfer of or exchange any Security if such Security may be among those selected for redemption during a period beginning at the opening of business 15 days before selection of the Securities to be redeemed under Section 1103 and ending at the close of business on (A) if such Securities are issuable only as Registered Securities, the day of the mailing of the relevant notice of redemption and (B) if such Securities are issuable as Bearer Securities, the day of the first publication of the relevant notice of redemption or, if such Securities are also issuable as Registered Securities and there is no publication, the mailing of the relevant notice of redemption, or (ii) to register the transfer of or exchange any Registered Security so selected for redemption in whole or in part, except, in the case of any Registered Security to be redeemed in part, the portion thereof not to be redeemed, or (iii) to exchange any Bearer Security so selected for redemption except that such a Bearer Security may be exchanged for a Registered Security of that series and like tenor, provided that such Registered Security shall be simultaneously surrendered for redemption, or

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(iv) to issue, register the transfer of or exchange any Security which has been surrendered for repayment at the option of the Holder, except the portion, if any, of such Security not to be so repaid.

Each Holder of a Security agrees to indemnify the Company and the Trustee against any liability that may result from the transfer, exchange or assignment of such Holder's Security in violation of any provision of this Indenture and/or applicable United States Federal or state securities law.

The Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Indenture or under applicable law with respect to any transfer of any interest in any Security (including any transfers between or among Depository Participants or beneficial owners of interests in any Global Security) other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when expressly required by, the terms of this Indenture, and to examine the same to determine substantial compliance as to form with the express requirements hereof.

SECTION 306 Mutilated, Destroyed, Lost and Stolen Securities.

If any mutilated Security or a Security with a mutilated coupon appertaining to it is surrendered to the Trustee or the Company, together with, in proper cases, such security or indemnity as may be required by the Company or the Trustee to save each of them or any agent of either of them harmless, the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor a new Security of the same series and principal amount, containing identical terms and provisions and bearing a number not contemporaneously outstanding, with coupons corresponding to the coupons, if any, appertaining to the surrendered Security.

If there shall be delivered to the Company and to the Trustee
(i) evidence to their satisfaction of the destruction, loss or theft of any Security or coupon, and (ii) such security or indemnity as may be required by them to save each of them and any agent of either of them harmless, then, in the absence of notice to the Company or the Trustee that such Security or coupon has been acquired by a bona fide purchaser, the Company shall execute and upon its request and according to its directions the Trustee shall authenticate and deliver, in lieu of any such destroyed, lost or stolen Security or in exchange for the Security to which a destroyed, lost or stolen coupon appertains (with all appurtenant coupons not destroyed, lost or stolen), a new Security of the same series and principal amount, containing identical terms and provisions and bearing a number not contemporaneously outstanding, with coupons corresponding to the coupons, if any, appertaining to such destroyed, lost or stolen Security or to the Security to which such destroyed, lost or stolen coupon appertains.

Notwithstanding the provisions of the previous two paragraphs, in case any such mutilated, destroyed, lost or stolen Security or coupon has become or is about to become due and payable, the Company in its discretion may, instead of issuing a new Security, with coupons corresponding to the coupons, if any, appertaining to such mutilated, destroyed, lost or stolen Security or to the Security to which such mutilated, destroyed, lost or stolen coupon appertains, pay such Security or coupon; provided, however, that payment of principal of (and premium, if

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any) and interest, if any, on Bearer Securities shall, except as otherwise provided in Section 1002, be payable only at an office or agency located outside the United States and, unless otherwise specified as contemplated by Section 301, any interest on Bearer Securities shall be payable only upon presentation and surrender of the coupons appertaining thereto.

Upon the issuance of any new Security under this Section, the Company may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Trustee) connected therewith.

Every new Security of any series, together with its coupons, if any, issued pursuant to this Section in lieu of any destroyed, lost or stolen Security, or in exchange for a Security to which a destroyed, lost or stolen coupon appertains, shall constitute an original additional contractual obligation of the Company, whether or not the destroyed, lost or stolen Security and its coupons, if any, or the destroyed, lost or stolen coupon shall be at any time enforceable by anyone, and shall be entitled to all the benefits of this Indenture equally and proportionately with any and all other Securities of that series and their coupons, if any, duly issued hereunder.

The provisions of this Section are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to the replacement or payment of mutilated, destroyed, lost or stolen Securities or coupons.

SECTION 307 Payment of Interest; Interest Rights Preserved; Optional Interest Reset.

(a) Except as otherwise specified with respect to a series of Securities in accordance with the provisions of Section 301, interest, if any, on any Registered Security that is payable, and is punctually paid or duly provided for, on any Interest Payment Date shall be paid to the Person in whose name that Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest at the office or agency of the Company maintained for such purpose pursuant to Section 1002; provided, however, that each installment of interest, if any, on any Registered Security may at the Company's option be paid by (i) mailing a check for such interest, payable to or upon the written order of the Person entitled thereto pursuant to Section 309, to the address of such Person as it appears on the Security Register or (ii) transfer to an account maintained by the payee inside the United States.

Unless otherwise provided as contemplated by Section 301 with respect to the Securities of any series, payment of interest, if any, may be made, in the case of a Bearer Security, by transfer to an account maintained by the payee with a bank located outside the United States.

Unless otherwise provided as contemplated by Section 301, every permanent global Security will provide that interest, if any, payable on any Interest Payment Date will be paid to each of Euroclear and Clearstream with respect to that portion of such permanent global Security held for its account by the Common Depositary, for the purpose of permitting each of

31

Euroclear and Clearstream to credit the interest, if any, received by it in respect of such permanent global Security to the accounts of the beneficial owners thereof.

In case a Bearer Security of any series is surrendered in exchange for a Registered Security of such series after the close of business (at an office or agency in a Place of Payment for such series) on any Regular Record Date and before the opening of business (at such office or agency) on the next succeeding Interest Payment Date, such Bearer Security shall be surrendered without the coupon relating to such Interest Payment Date and interest will not be payable on such Interest Payment Date in respect of the Registered Security issued in exchange for such Bearer Security, but will be payable only to the Holder of such coupon when due in accordance with the provisions of this Indenture.

Except as otherwise specified with respect to a series of Securities in accordance with the provisions of Section 301, any interest on any Registered Security of any series that is payable, but is not punctually paid or duly provided for, on any Interest Payment Date (herein called "Defaulted Interest") shall forthwith cease to be payable to the registered Holder thereof on the relevant Regular Record Date by virtue of having been such Holder, and such Defaulted Interest may be paid by the Company, at its election in each case, as provided in clause (1) or (2) below:

(1) The Company may elect to make payment of any Defaulted Interest to the Persons in whose names the Registered Securities of such series (or their respective Predecessor Securities) are registered at the close of business on a Special Record Date for the payment of such Defaulted Interest, which shall be fixed in the following manner. The Company shall notify the Trustee in writing of the amount of Defaulted Interest proposed to be paid on each Registered Security of such series and the date of the proposed payment (which shall not be less than 20 days after such notice is received by the Trustee), and at the same time the Company shall deposit with the Trustee an amount of money in the Currency in which the Securities of such series are payable (except as otherwise specified pursuant to Section 301 for the Securities of such series and except, if applicable, as provided in Sections 312(b), 312(d) and 312(e)) equal to the aggregate amount proposed to be paid in respect of such Defaulted Interest or shall make arrangements satisfactory to the Trustee for such deposit on or prior to the date of the proposed payment, such money when deposited to be held in trust for the benefit of the Persons entitled to such Defaulted Interest as in this clause provided. Thereupon the Trustee shall fix a Special Record Date for the payment of such Defaulted Interest which shall be not more than 15 days and not less than 10 days prior to the date of the proposed payment and not less than 10 days after the receipt by the Trustee of the notice of the proposed payment. The Trustee shall promptly notify the Company of such Special Record Date and, in the name and at the expense of the Company, shall cause notice of the proposed payment of such Defaulted Interest and the Special Record Date therefor to be mailed, first-class postage prepaid, to each Holder of Registered Securities of such series at his address as it appears in the Security Register not less than 10 days prior to such Special Record Date. Notice of the proposed payment of such Defaulted Interest and the Special Record Date therefor having been mailed as aforesaid, such Defaulted Interest shall be paid to the Persons in whose names the Registered Securities of such series (or their respective Predecessor Securities) are registered at the close of business

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on such Special Record Date and shall no longer be payable pursuant to the following clause (2). In case a Bearer Security of any series is surrendered at the office or agency in a Place of Payment for such series in exchange for a Registered Security of such series after the close of business at such office or agency on any Special Record Date and before the opening of business at such office or agency on the related proposed date for payment of Defaulted Interest, such Bearer Security shall be surrendered without the coupon relating to such proposed date of payment and Defaulted Interest will not be payable on such proposed date of payment in respect of the Registered Security issued in exchange for such Bearer Security, but will be payable only to the Holder of such coupon when due in accordance with the provisions of this Indenture.

(2) The Company may make payment of any Defaulted Interest on the Registered Securities of any series in any other lawful manner not inconsistent with the requirements of any securities exchange on which such Securities may be listed, and upon such notice as may be required by such exchange, if, after notice given by the Company to the Trustee of the proposed payment pursuant to this clause, such manner of payment shall be deemed practicable by the Trustee.

(b) The provisions of this Section 307(b) may be made applicable to any series of Securities pursuant to Section 301 (with such modifications, additions or substitutions as may be specified pursuant to such
Section 301). The interest rate (or the spread or spread multiplier used to calculate such interest rate, if applicable) on any Security of such series may be reset by the Company on the date or dates specified on the face of such Security (each an "Optional Reset Date"). The Company may exercise such option with respect to such Security by notifying the Trustee of such exercise at least 45 but not more than 60 days prior to an Optional Reset Date for such Security. Not later than 40 days prior to each Optional Reset Date, the Trustee shall transmit, in the manner provided for in Section 106, to the Holder of any such Security a notice (the "Reset Notice") indicating whether the Company has elected to reset the interest rate (or the spread or spread multiplier used to calculate such interest rate, if applicable), and if so (i) such new interest rate (or such new spread or spread multiplier, if applicable) and (ii) the provisions, if any, for redemption during the period from such Optional Reset Date to the next Optional Reset Date or if there is no such next Optional Reset Date, to the Stated Maturity of such Security (each such period a "Subsequent Interest Period"), including the date or dates on which or the period or periods during which and the price or prices at which such redemption may occur during the Subsequent Interest Period.

Notwithstanding the foregoing, not later than 20 days prior to the Optional Reset Date, the Company may, at its option, revoke the interest rate (or the spread or spread multiplier used to calculate such interest rate, if applicable) provided for in the Reset Notice and establish a higher interest rate (or a spread or spread multiplier providing for a higher interest rate, if applicable) for the Subsequent Interest Period by causing the Trustee to transmit, in the manner provided for in Section 106, notice of such higher interest rate (or such spread or spread multiplier providing for a higher interest rate, if applicable) to the Holder of such Security. Such notice shall be irrevocable. All Securities with respect to which the interest rate (or the spread or spread multiplier used to calculate such interest rate, if applicable) is reset on an Optional Reset Date, and with respect to which the Holders of such Securities have not tendered such Securities for repayment (or have validly revoked any such tender) pursuant to the next succeeding

33

paragraph, will bear such higher interest rate (or such spread or spread multiplier providing for a higher interest rate, if applicable).

The Holder of any such Security may have the option to elect repayment by the Company of the principal of such Security on each Optional Reset Date at a price equal to the principal amount thereof plus interest accrued to such Optional Reset Date. In order to obtain repayment on an Optional Reset Date, the Holder must follow the procedures set forth in Article Thirteen for repayment at the option of Holders except that the period for delivery or notification to the Trustee shall be at least 25 but not more than 35 days prior to such Optional Reset Date and except that, if the Holder has tendered any Security for repayment pursuant to the Reset Notice, the Holder may, by written notice to the Trustee, revoke such tender or repayment until the close of business on the tenth day before such Optional Reset Date.

Subject to the foregoing provisions of this Section and
Section 305, each Security delivered under this Indenture upon registration of transfer of or in exchange for or in lieu of any other Security shall carry the rights to interest accrued and unpaid, and to accrue, which were carried by such other Security.

SECTION 308 Optional Extension of Maturity.

The provisions of this Section 308 may be made applicable to any series of Securities pursuant to Section 301 (with such modifications, additions or substitutions as may be specified pursuant to such Section 301). The Stated Maturity of any Security of such series may be extended at the option of the Company for the period or periods specified on the face of such Security (each an "Extension Period") up to but not beyond the date (the "Final Maturity") set forth on the face of such Security. The Company may exercise such option with respect to any Security by notifying the Trustee of such exercise at least 45 but not more than 60 days prior to the Stated Maturity of such Security in effect prior to the exercise of such option (the "Original Stated Maturity"). If the Company exercises such option, the Trustee shall transmit, in the manner provided for in Section 106, to the Holder of such Security not later than 40 days prior to the Original Stated Maturity a notice (the "Extension Notice") indicating (i) the election of the Company to extend the Stated Maturity, (ii) the new Stated Maturity, (iii) the interest rate (or spread, spread multiplier or other formula used to calculate such interest rate, if applicable), if any, applicable to the Extension Period and (iv) the provisions, if any, for redemption during such Extension Period. Upon the Trustee's transmittal of the Extension Notice, the Stated Maturity of such Security shall be extended automatically and, except as modified by the Extension Notice and as described in the next paragraph, such Security will have the same terms as prior to the transmittal of such Extension Notice.

Notwithstanding the foregoing, not later than 20 days before the Original Stated Maturity of such Security, the Company may, at its option, revoke the interest rate (or spread, spread multiplier or other formula used to calculate such interest rate, if applicable) provided for in the Extension Notice and establish a higher interest rate (or spread, spread multiplier or other formula to calculate such higher interest rate, if applicable) for the Extension Period by causing the Trustee to transmit, in the manner provided for in Section 106, notice of such higher interest rate (or spread, spread multiplier or other formula used to calculate such interest rate, if

34

applicable) to the Holder of such Security. Such notice shall be irrevocable. All Securities with respect to which the Stated Maturity is extended will bear such higher interest rate.

If the Company extends the Stated Maturity of any Security, the Holder will have the option to elect repayment of such Security by the Company on the Original Stated Maturity at a price equal to the principal amount thereof, plus interest accrued to such date. In order to obtain repayment on the Original Stated Maturity once the Company has extended the Stated Maturity thereof, the Holder must follow the procedures set forth in Article Thirteen for repayment at the option of Holders, except that the period for delivery or notification to the Trustee shall be at least 25 but not more than 35 days prior to the Original Stated Maturity and except that, if the Holder has tendered any Security for repayment pursuant to an Extension Notice, the Holder may by written notice to the Trustee revoke such tender for repayment until the close of business on the tenth day before the Original Stated Maturity.

SECTION 309 Persons Deemed Owners.

Prior to due presentment of a Registered Security for registration of transfer, the Company, the Subsidiary Guarantors, if any, the Trustee and any agent of the Company, the Subsidiary Guarantors, if any, or the Trustee may treat the Person in whose name such Registered Security is registered as the owner of such Security for the purpose of receiving payment of principal of (and premium, if any) and (subject to Sections 305 and 307) interest, if any, on such Registered Security and for all other purposes whatsoever, whether or not such Registered Security be overdue, and none of the Company, the Subsidiary Guarantors, if any, the Trustee nor any agent of the Company, the Subsidiary Guarantors, if any, or the Trustee shall be affected by notice to the contrary.

Title to any Bearer Security and any coupons appertaining thereto shall pass by delivery. The Company, the Subsidiary Guarantors, if any, the Trustee and any agent of the Company, the Subsidiary Guarantors, if any, or the Trustee may treat the bearer of any Bearer Security and the bearer of any coupon as the absolute owner of such Security or coupon for the purpose of receiving payment thereof or on account thereof and for all other purposes whatsoever, whether or not such Security or coupon be overdue, and none of the Company, the Subsidiary Guarantors, if any, the Trustee nor any agent of the Company, the Subsidiary Guarantors, if any, or the Trustee shall be affected by notice to the contrary.

None of the Company, the Subsidiary Guarantors, the Trustee, any Paying Agent or the Security Registrar will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests of a Security in global form or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

Notwithstanding the foregoing, with respect to any global Security, nothing herein shall prevent the Company, the Subsidiary Guarantors, the Trustee, or any agent of the Company, the Subsidiary Guarantors, if any, or the Trustee, from giving effect to any written certification, proxy or other authorization furnished by any depositary, as a Holder, with respect to such global Security or impair, as between such depositary and owners of beneficial interests

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in such global Security, the operation of customary practices governing the exercise of the rights of such depositary (or its nominee) as Holder of such global Security.

SECTION 310 Cancellation.

All Securities and coupons surrendered for payment, redemption, repayment at the option of the Holder, registration of transfer or exchange or for credit against any sinking fund payment shall, if surrendered to any Person other than the Trustee, be delivered to the Trustee, and any such Securities and coupons and Securities and coupons surrendered directly to the Trustee for any such purpose shall be promptly cancelled by it. The Company may at any time deliver to the Trustee for cancellation any Securities previously authenticated and delivered hereunder which the Company may have acquired in any manner whatsoever, and may deliver to the Trustee (or to any other Person for delivery to the Trustee) for cancellation any Securities previously authenticated hereunder which the Company has not issued and sold, and all Securities so delivered shall be promptly cancelled by the Trustee. If the Company shall so acquire any of the Securities, however, such acquisition shall not operate as a redemption or satisfaction of the indebtedness represented by such Securities unless and until the same are surrendered to the Trustee for cancellation. No Securities shall be authenticated in lieu of or in exchange for any Securities cancelled as provided in this Section, except as expressly permitted by this Indenture. Cancelled Securities and coupons held by the Trustee shall be destroyed by the Trustee and the Trustee shall deliver a certificate of such destruction to the Company, unless by a Company Order the Company directs their return to it.

SECTION 311 Computation of Interest.

Except as otherwise specified as contemplated by Section 301 with respect to Securities of any series, interest, if any, on the Securities of each series shall be computed on the basis of a 360-day year consisting of twelve 30-day months.

SECTION 312 Currency and Manner of Payments in Respect of Securities.

(a) Unless otherwise specified with respect to any Securities pursuant to Section 301, with respect to Registered Securities of any series not permitting the election provided for in paragraph (b) below or the Holders of which have not made the election provided for in paragraph (b) below, and with respect to Bearer Securities of any series, except as provided in paragraph (d) below, payment of the principal of (and premium, if any) and interest, if any, on any Registered or Bearer Security of such series will be made in the Currency in which such Registered Security or Bearer Security, as the case may be, is payable. The provisions of this Section 312 may be modified or superseded with respect to any Securities pursuant to Section 301.

(b) It may be provided pursuant to Section 301 with respect to Registered Securities of any series that Holders shall have the option, subject to paragraphs (d) and (e) below, to receive payments of principal of (or premium, if any) or interest, if any, on such Registered Securities in any of the Currencies which may be designated for such election by delivering to the Trustee for such series of Registered Securities a written election with signature guarantees and in the applicable form established pursuant to Section 301, not later than the close

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of business on the Election Date immediately preceding the applicable payment date. If a Holder so elects to receive such payments in any such Currency, such election will remain in effect for such Holder or any transferee of such Holder until changed by such Holder or such transferee by written notice to the Trustee for such series of Registered Securities (but any such change must be made not later than the close of business on the Election Date immediately preceding the next payment date to be effective for the payment to be made on such payment date and no such change of election may be made with respect to payments to be made on any Registered Security of such series with respect to which an Event of Default has occurred or with respect to which the Company has deposited funds pursuant to Article Four or Fourteen or with respect to which a notice of redemption has been given by the Company or a notice of option to elect repayment has been sent by such Holder or such transferee). Any Holder of any such Registered Security who shall not have delivered any such election to the Trustee of such series of Registered Securities not later than the close of business on the applicable Election Date will be paid the amount due on the applicable payment date in the relevant Currency as provided in Section 312(a). The Trustee for each such series of Registered Securities shall notify the Exchange Rate Agent as soon as practicable after the Election Date of the aggregate principal amount of Registered Securities for which Holders have made such written election.

(c) Unless otherwise specified pursuant to Section 301, if the election referred to in paragraph (b) above has been provided for pursuant to
Section 301, then, unless otherwise specified pursuant to Section 301, not later than the fourth Business Day after the Election Date for each payment date for Registered Securities of any series, the Exchange Rate Agent will deliver to the Company a written notice specifying the Currency in which Registered Securities of such series are payable, the respective aggregate amounts of principal of (and premium, if any) and interest, if any, on the Registered Securities to be paid on such payment date, specifying the amounts in such Currency so payable in respect of the Registered Securities as to which the Holders of Registered Securities denominated in any Currency shall have elected to be paid in another Currency as provided in paragraph (b) above. If the election referred to in paragraph (b) above has been provided for pursuant to Section 301 and if at least one Holder has made such election, then, unless otherwise specified pursuant to Section 301, on the second Business Day preceding such payment date the Company will deliver to the Trustee for such series of Registered Securities an Exchange Rate Officer's Certificate in respect of the Dollar or Foreign Currency or Currencies payments to be made on such payment date. Unless otherwise specified pursuant to Section 301, the Dollar or Foreign Currency or Currencies amount receivable by Holders of Registered Securities who have elected payment in a Currency as provided in paragraph (b) above shall be determined by the Company on the basis of the applicable Market Exchange Rate in effect on the second Business Day (the "Valuation Date") immediately preceding each payment date, and such determination shall be conclusive and binding for all purposes, absent manifest error.

(d) If a Conversion Event occurs with respect to a Foreign Currency in which any of the Securities are denominated or payable other than pursuant to an election provided for pursuant to paragraph (b) above, then with respect to each date for the payment of principal of (and premium, if any) and interest, if any on the applicable Securities denominated or payable in such Foreign Currency occurring after the last date on which such Foreign Currency was used (the "Conversion Date"), the Dollar shall be the currency of payment for use on each such payment date. Unless otherwise specified pursuant to
Section 301, the Dollar amount to be paid

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by the Company to the Trustee of each such series of Securities and by such Trustee or any Paying Agent to the Holders of such Securities with respect to such payment date shall be, in the case of a Foreign Currency other than a currency unit, the Dollar Equivalent of the Foreign Currency or, in the case of a currency unit, the Dollar Equivalent of the Currency Unit, in each case as determined by the Exchange Rate Agent in the manner provided in paragraph (f) or
(g) below.

(e) Unless otherwise specified pursuant to Section 301, if the Holder of a Registered Security denominated in any Currency shall have elected to be paid in another Currency as provided in paragraph (b) above, and a Conversion Event occurs with respect to such elected Currency, such Holder shall receive payment in the Currency in which payment would have been made in the absence of such election; and if a Conversion Event occurs with respect to the Currency in which payment would have been made in the absence of such election, such Holder shall receive payment in Dollars as provided in paragraph (d) of this Section 312.

(f) The "Dollar Equivalent of the Foreign Currency" shall be determined by the Exchange Rate Agent and shall be obtained for each subsequent payment date by converting the specified Foreign Currency into Dollars at the Market Exchange Rate on the Conversion Date.

(g) The "Dollar Equivalent of the Currency Unit" shall be determined by the Exchange Rate Agent and subject to the provisions of paragraph
(h) below shall be the sum of each amount obtained by converting the Specified Amount of each Component Currency into Dollars at the Market Exchange Rate for such Component Currency on the Valuation Date with respect to each payment.

(h) For purposes of this Section 312, the following terms shall have the following meanings:

A "Component Currency" shall mean any currency which, on the Conversion Date, was a component currency of the relevant currency unit, including, but not limited to, the euro.

A "Specified Amount" of a Component Currency shall mean the number of units of such Component Currency or fractions thereof which were represented in the relevant currency unit, including, but not limited to, the euro, on the Conversion Date. If after the Conversion Date the official unit of any Component Currency is altered by way of combination or subdivision, the Specified Amount of such Component Currency shall be divided or multiplied in the same proportion. If after the Conversion Date two or more Component Currencies are consolidated into a single currency, the respective Specified Amounts of such Component Currencies shall be replaced by an amount in such single currency equal to the sum of the respective Specified Amounts of such consolidated Component Currencies expressed in such single currency, and such amount shall thereafter be a Specified Amount and such single currency shall thereafter be a Component Currency. If after the Conversion Date any Component Currency shall be divided into two or more currencies, the Specified Amount of such Component Currency shall be replaced by amounts of such two or more currencies, having an aggregate Dollar Equivalent value at the Market Exchange Rate on the date of such replacement equal to

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the Dollar Equivalent of the Specified Amount of such former Component Currency at the Market Exchange Rate immediately before such division, and such amounts shall thereafter be Specified Amounts and such currencies shall thereafter be Component Currencies. If, after the Conversion Date of the relevant currency unit, including, but not limited to, the euro, a Conversion Event (other than any event referred to above in this definition of "Specified Amount") occurs with respect to any Component Currency of such currency unit and is continuing on the applicable Valuation Date, the Specified Amount of such Component Currency shall, for purposes of calculating the Dollar Equivalent of the Currency Unit, be converted into Dollars at the Market Exchange Rate in effect on the Conversion Date of such Component Currency.

"Election Date" shall mean the Regular Record Date for the applicable series of Registered Securities or at least 16 days prior to Maturity, as the case may be, or such other prior date for any series of Registered Securities as specified pursuant to clause 13 of Section 301 by which the written election referred to in Section 312(b) may be made.

All decisions and determinations of the Exchange Rate Agent regarding the Dollar Equivalent of the Foreign Currency, the Dollar Equivalent of the Currency Unit, the Market Exchange Rate and changes in the Specified Amounts as specified above shall be in its sole discretion and shall, in the absence of manifest error, be conclusive for all purposes and irrevocably binding upon the Company, the Trustee for the appropriate series of Securities and all Holders of such Securities denominated or payable in the relevant Currency. The Exchange Rate Agent shall promptly give written notice to the Company and the Trustee for the appropriate series of Securities of any such decision or determination.

In the event that the Company determines in good faith that a Conversion Event has occurred with respect to a Foreign Currency, the Company will immediately give written notice thereof to the Trustee of the appropriate series of Securities and to the Exchange Rate Agent (and such Trustee will promptly thereafter give notice in the manner provided in Section 106 to the affected Holders) specifying the Conversion Date. In the event the Company so determines that a Conversion Event has occurred with respect to the euro or any other currency unit in which Securities are denominated or payable, the Company will immediately give written notice thereof to the Trustee of the appropriate series of Securities and to the Exchange Rate Agent (and such Trustee will promptly thereafter give notice in the manner provided in Section 106 to the affected Holders) specifying the Conversion Date and the Specified Amount of each Component Currency on the Conversion Date. In the event the Company determines in good faith that any subsequent change in any Component Currency as set forth in the definition of Specified Amount above has occurred, the Company will similarly give written notice to the Trustee of the appropriate series of Securities and to the Exchange Rate Agent.

The Trustee of the appropriate series of Securities shall be fully justified and protected in conclusively relying and acting upon information received by it from the Company and the Exchange Rate Agent and shall not otherwise have any duty or obligation to determine the accuracy or validity of such information independent of the Company or the Exchange Rate Agent.

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SECTION 313 Appointment and Resignation of Successor Exchange Rate Agent.

(a) Unless otherwise specified pursuant to Section 301, if and so long as the Securities of any series (i) are denominated in a Foreign Currency or (ii) may be payable in a Foreign Currency, or so long as it is required under any other provision of this Indenture, then the Company will maintain with respect to each such series of Securities, or as so required, at least one Exchange Rate Agent. The Company will cause the Exchange Rate Agent to make the necessary foreign exchange determinations at the time and in the manner specified pursuant to Section 301 for the purpose of determining the applicable rate of exchange and, if applicable, for the purpose of converting the issued Foreign Currency into the applicable payment Currency for the payment of principal (and premium, if any) and interest, if any, pursuant to Section 312.

(b) No resignation of the Exchange Rate Agent and no appointment of a successor Exchange Rate Agent pursuant to this Section shall become effective until the acceptance of appointment by the successor Exchange Rate Agent as evidenced by a written instrument delivered to the Company and the Trustee of the appropriate series of Securities accepting such appointment executed by the successor Exchange Rate Agent.

(c) If the Exchange Rate Agent shall resign, be removed or become incapable of acting, or if a vacancy shall occur in the office of the Exchange Rate Agent for any cause, with respect to the Securities of one or more series, the Company, by or pursuant to a Board Resolution, shall promptly appoint a successor Exchange Rate Agent or Exchange Rate Agents with respect to the Securities of that or those series (it being understood that any such successor Exchange Rate Agent may be appointed with respect to the Securities of one or more or all of such series and that, unless otherwise specified pursuant to Section 301, at any time there shall only be one Exchange Rate Agent with respect to the Securities of any particular series that are originally issued by the Company on the same date and that are initially denominated and/or payable in the same Currency).

SECTION 314 CUSIP Numbers.

The Company in issuing the Securities may use "CUSIP" numbers (if then generally in use), and, if so, the Trustee shall indicate the "CUSIP" numbers of the Securities in notices of redemption as a convenience to Holders; provided that, any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Securities or as contained in any notice of redemption and that reliance may be placed only on the other identification numbers printed on the Securities, and any such redemption shall not be affected by any defect in or omission of such numbers. The Company will promptly notify the Trustee of any change in the "CUSIP" numbers.

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ARTICLE FOUR

SATISFACTION AND DISCHARGE

SECTION 401 Satisfaction and Discharge of Indenture.

Unless otherwise specified pursuant to Section 301, this Indenture shall upon Company Request cease to be of further effect with respect to any series of Securities specified in such Company Request (except as to any surviving rights of registration of transfer or exchange of Securities of such series expressly provided for herein or pursuant hereto and any right to receive Additional Amounts, as provided in Section 1005), and the Trustee, upon receipt of a Company Order, and at the expense of the Company, shall execute proper instruments acknowledging satisfaction and discharge of this Indenture as to such series when

(1) either

(A) all Securities of such series theretofore authenticated and delivered and all coupons, if any, appertaining thereto (other than (i) coupons appertaining to Bearer Securities surrendered for exchange for Registered Securities and maturing after such exchange, whose surrender is not required or has been waived as provided in Section 305,
(ii) Securities and coupons of such series which have been destroyed, lost or stolen and which have been replaced or paid as provided in Section 306, (iii) coupons appertaining to Securities called for redemption and maturing after the relevant Redemption Date, whose surrender has been waived as provided in Section 1106, and (iv) Securities and coupons of such series for whose payment money has theretofore been deposited in trust or segregated and held in trust by the Company and thereafter repaid to the Company or discharged from such trust, as provided in Section 1003) have been delivered to the Trustee for cancellation; or

(B) all Securities of such series and, in the case of
(I) or (II) below, any coupons appertaining thereto not theretofore delivered to the Trustee for cancellation

(I) have become due and payable, or

(II) will become due and payable at their Stated Maturity within one year, or

(III) if redeemable at the option of the Company, are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption by the Trustee in the name, and at the expense, of the Company,

and the Company, in the case of (I), (II) or (III) above, has irrevocably deposited or caused to be deposited with the Trustee as trust funds in trust for such purpose an amount in the Currency in which the Securities of

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such series are payable, sufficient to pay and discharge the entire indebtedness on such Securities and such coupons not theretofore delivered to the Trustee for cancellation, including the principal (and premium, if any) and interest, if any, to the date of such deposit (in the case of Securities which have become due and payable) or to the Stated Maturity or Redemption Date, as the case may be;

(2) the Company has paid or caused to be paid all other sums payable hereunder by the Company; and

(3) the Company has delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, each stating that all conditions precedent herein provided for relating to the satisfaction and discharge of this Indenture as to such series have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the obligations of the Company to the Trustee and any predecessor Trustee under
Section 606, the obligations of the Company to any Authenticating Agent under
Section 611 if money shall have been deposited with the Trustee pursuant to subclause (B) of clause (1) of this Section, the obligations of the Trustee under Section 402 and the last paragraph of Section 1003 and the obligations of the Company and the Trustee with respect to Securities of such series under Sections 305, 306, 1002 and 1005, with respect to the payment of Additional Amounts, if any, with respect to any rights of Holders to require the Company to repay such Securities as contemplated by Section 1301 and with respect to any rights of Holders to convert or exchange such Securities into other Securities, shall survive. These obligations shall continue to be governed and construed in accordance with Section 111.

SECTION 402 Application of Trust Funds.

Subject to the provisions of the last paragraph of Section 1003, all money deposited with the Trustee pursuant to Section 401 shall be held in trust and applied by it, in accordance with the provisions of the Securities, the coupons and this Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as its own Paying Agent) as the Trustee may determine, to the Persons entitled thereto, of the principal (and premium, if any) and interest, if any, for whose payment such money has been deposited with or received by the Trustee, but such money need not be segregated from other funds except to the extent required by law.

ARTICLE FIVE

REMEDIES

SECTION 501 Events of Default.

"Event of Default", wherever used herein with respect to any particular series of Securities, means any one of the following events as such events may be otherwise amended in accordance with Section 301 (whatever the reason for such Event of Default and whether or not

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it shall be voluntary or involuntary or be effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body):

(1) default in the payment of any interest upon, or any Additional Amount payable in respect of, any Security of that series or of any coupon appertaining thereto, when such interest or coupon becomes due and payable, and continuance of such default for a period of 30 days; or

(2) default in the payment of the principal of (or premium, if any, on) any Security of that series when it becomes due and payable at its Maturity; or

(3) default in the deposit of any sinking fund payment, when and as due by the terms of any Security of that series; or

(4) default in the performance, or breach, of any covenant or agreement of the Company or any Subsidiary Guarantor in this Indenture with respect to any Security of that series (other than a covenant or agreement a default in whose performance or whose breach is elsewhere in this Section specifically dealt with), and continuance of such default or breach for a period of 60 days after there has been given, by registered or certified mail, to the Company or such Subsidiary Guarantor, as the case may be, by the Trustee or to the Company or such Subsidiary Guarantor, as the case may be, and the Trustee by the Holders of at least 25% in principal amount of the Outstanding Securities of that series a written notice specifying such default or breach and requiring it to be remedied and stating that such notice is a "Notice of Default" hereunder; or

(5) the Company or any Subsidiary Guarantor pursuant to or within the meaning of any Bankruptcy Law:

(A) commences a voluntary case or proceedings,

(B) consents to the entry of an order for relief against it in an involuntary case or proceedings,

(C) consents to the appointment of a Custodian of it or for all or substantially all of its property,

(D) makes a general assignment for the benefit of its creditors, or

(E) issues a public announcement admitting its inability to pay its debts generally as they become due; or

(6) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that:

(A) is for relief against the Company or any Subsidiary Guarantor in an involuntary case,

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(B) appoints a Custodian of the Company or any Subsidiary Guarantor or for all or substantially all of its property, or

(C) orders the winding-up or liquidation of the Company or any Subsidiary Guarantor, and the order or decree remains unstayed and in effect for 90 days; or

(7) any Subsidiary Guarantor repudiates its obligations under any Subsidiary Guarantee or, except as permitted by this Indenture, any Subsidiary Guarantee is determined to be unenforceable or invalid or shall for any reason cease to be in full force and effect; or

(8) any other Event of Default provided with respect to Securities of that series.

The term "Bankruptcy Law" means title 11, U.S. Code or any similar foreign, Federal or State law for the relief of debtors. The term "Custodian" means any custodian, receiver, trustee, assignee, liquidator or other similar official under any Bankruptcy Law.

SECTION 502 Acceleration of Maturity; Rescission and Annulment.

If an Event of Default (other than an Event of Default specified in Section 501(5) or 501(6) with respect to the Company) with respect to Securities of any series at the time Outstanding occurs and is continuing, then and in every such case the Trustee or the Holders of not less than 25% in principal amount of the Outstanding Securities of that series may declare the principal (or, if any Securities are Original Issue Discount Securities or Indexed Securities, such portion of the principal as may be specified in the terms thereof) and accrued interest of all the Securities of that series to be due and payable immediately, by a notice in writing to the Company (and to the Trustee if given by the Holders), and upon any such declaration such principal or specified portion thereof and interest shall become immediately due and payable. If an Event of Default specified in Section 501(5) or 501(6) with respect to the Company or any Subsidiary Guarantor occurs, the amounts described above with respect to the Outstanding Securities of all series shall ipso facto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holder. Upon payment of such principal and interest, all of the Company's obligations under the Securities of such Series and this Indenture, other than obligations under Section 606, shall terminate.

At any time after such a declaration of acceleration with respect to Securities of any series has been made and before a judgment or decree for payment of the money due has been obtained by the Trustee as hereinafter provided in this Article, the Holders of a majority in principal amount of the Outstanding Securities of that series, by written notice to the Company and the Trustee, may rescind and annul such declaration and its consequences if:

(1) the Company has paid or deposited with the Trustee a sum sufficient in cash to pay all principal, interest and Additional Amounts which have become due other than by such declaration of acceleration, interest or any such overdue amounts, and amounts owing the Trustee;

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(2) all Events of Default with respect to Securities of that series, other than the nonpayment of the principal of (or premium, if any) or interest on Securities of that series which have become due solely by such declaration of acceleration, have been cured or waived as provided in Section 513; and

(3) such rescission would not conflict with any judgment or decree of a court of competent jurisdiction.

No such rescission shall affect any subsequent default or impair any right consequent thereon.

SECTION 503 Collection of Indebtedness and Suits for Enforcement by Trustee.

The Company covenants that if:

(1) default is made in the payment of any installment of interest or Additional Amounts on any Security of any series and any related coupon when such interest or Additional Amounts becomes due and payable and such default continues for a period of 30 days, or

(2) default is made in the payment of the principal of (or premium, if any, on) any Security of any series at its Maturity,

then the Company will, upon demand of the Trustee, pay to the Trustee, for the benefit of the Holders of Securities of such series and coupons, the whole amount then due and payable on such Securities and coupons for principal (and premium, if any) and interest, if any, with interest upon any overdue principal (and premium, if any) and, to the extent that payment of such interest shall be legally enforceable, upon any overdue installments of interest, if any, at the rate or rates borne by or provided for in such Securities, and, in addition thereto, such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel.

If the Company fails to pay such amounts forthwith upon such demand, the Trustee, in its own name and as trustee of an express trust, may institute a judicial proceeding for the collection of the sums so due and unpaid, and may prosecute such proceeding to judgment or final decree, and may enforce the same against the Company or any other obligor upon Securities of such series and collect the moneys adjudged or decreed to be payable in the manner provided by law out of the property of the Company or any other obligor upon such Securities of such series, wherever situated.

If an Event of Default with respect to Securities of any series occurs and is continuing, the Trustee may in its discretion proceed to protect and enforce its rights and the rights of the Holders of Securities of such series and any related coupons by such appropriate judicial proceedings as the Trustee shall deem most effectual to protect and enforce any such rights, whether for the specific enforcement of any covenant or agreement in this Indenture or in aid of the exercise of any power granted herein, or to enforce any other proper remedy.

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SECTION 504 Trustee May File Proofs of Claim.

In case of the pendency of any receivership, insolvency, liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or other judicial proceeding relative to the Company any Subsidiary Guarantor or any other obligor upon the Securities or the property of the Company, such Subsidiary Guarantor or of such other obligor or their creditors, the Trustee (irrespective of whether the principal of the Securities of any series shall then be due and payable as therein expressed or by declaration or otherwise and irrespective of whether the Trustee shall have made any demand on the Company for the payment of any overdue principal, premium or interest) shall be entitled and empowered, by intervention in such proceeding or otherwise:

(A) to file and prove a claim for the whole amount of principal (or in the case of Original Issue Discount Securities or Indexed Securities, such portion of the principal as may be provided for in the terms thereof) (and premium, if any) and interest, if any, owing and unpaid in respect of the Securities and to file such other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel) and of the Holders allowed in such judicial proceeding, and

(B) to collect and receive any moneys or other property payable or deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator (or other similar official) in any such judicial proceeding is hereby authorized by each Holder of Securities of such series and coupons to make such payments to the Trustee, and in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due to it for the reasonable compensation, expenses, disbursements and advances of the Trustee and any predecessor Trustee, their agents and counsel, and any other amounts due the Trustee or any predecessor Trustee under Section 606.

Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf of any Holder of a Security or coupon any plan of reorganization, arrangement, adjustment or composition affecting the Securities or coupons or the rights of any Holder thereof, or to authorize the Trustee to vote in respect of the claim of any Holder of a Security or coupon in any such proceeding.

SECTION 505 Trustee May Enforce Claims Without Possession of Securities or Coupons.

All rights of action and claims under this Indenture or any of the Securities or coupons may be prosecuted and enforced by the Trustee without the possession of any of the Securities or coupons or the production thereof in any proceeding relating thereto, and any such proceeding instituted by the Trustee shall be brought in its own name as trustee of an express trust, and any recovery of judgment shall, after provision for the payment of the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, be

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for the ratable benefit of the Holders of the Securities and coupons in respect of which such judgment has been recovered.

SECTION 506 Application of Money Collected.

Any money collected by the Trustee pursuant to this Article shall be applied in the following order, at the date or dates fixed by the Trustee and, in case of the distribution of such money on account of principal (or premium, if any) or interest, if any, upon presentation of the Securities or coupons, or both, as the case may be, and the notation thereon of the payment if only partially paid and upon surrender thereof if fully paid:

FIRST: To the payment of all amounts due the Trustee and any predecessor Trustee under Section 606;

SECOND: To the payment of the amounts then due and unpaid upon the Securities and coupons for principal (and premium, if any) and interest, if any, in respect of which or for the benefit of which such money has been collected, ratably, without preference or priority of any kind, according to the aggregate amounts due and payable on such Securities and coupons for principal (and premium, if any) and interest, if any, respectively; and

THIRD: To the payment of the remainder, if any, to the Company.

SECTION 507 Limitation on Suits.

No Holder of any Security of any series or any related coupon shall have any right to institute any proceeding, judicial or otherwise, with respect to this Indenture, or for the appointment of a receiver or trustee, or for any other remedy hereunder, unless:

(1) such Holder has previously given written notice to the Trustee of a continuing Event of Default with respect to the Securities of that series;

(2) the Holders of not less than 25% in principal amount of the Outstanding Securities of that series shall have made written request to the Trustee to institute proceedings in respect of such Event of Default in its own name as Trustee hereunder;

(3) such Holder or Holders have offered to the Trustee reasonable indemnity against the costs, expenses and liabilities to be incurred in compliance with such request;

(4) the Trustee for 60 days after its receipt of such notice, request and offer of indemnity has failed to institute any such proceeding; and

(5) no direction inconsistent with such written request has been given to the Trustee during such 60-day period by the Holders of a majority in principal amount of the Outstanding Securities of that series;

it being understood and intended that no one or more of such Holders shall have any right in any manner whatever by virtue of, or by availing of, any provision of this Indenture to affect, disturb

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or prejudice the rights of any other of such Holders, or to obtain or to seek to obtain priority or preference over any other of such Holders or to enforce any right under this Indenture, except in the manner herein provided and for the equal and ratable benefit of all such Holders.

SECTION 508 Unconditional Right of Holders to Receive Principal, Premium and Interest and Additional Amounts, if Any.

Notwithstanding any other provision in this Indenture, the Holder of any Security or coupon shall have the right which is absolute and unconditional to receive payment of the principal of (and premium, if any) and (subject to Sections 305 and 307) interest, if any, and Additional Amounts, if any, on such Security or payment of such coupon on the respective due dates expressed in such Security or coupon (or, in the case of redemption, on the Redemption Date) and to institute suit for the enforcement of any such payment, and such rights shall not be impaired without the consent of such Holder.

SECTION 509 Restoration of Rights and Remedies.

If the Trustee or any Holder of a Security or coupon has instituted any proceeding to enforce any right or remedy under this Indenture and such proceeding has been discontinued or abandoned for any reason, or has been determined adversely to the Trustee or to such Holder, then and in every such case the Company, the Subsidiary Guarantors, the Trustee and the Holders of Securities and coupons shall, subject to any determination in such proceeding, be restored severally and respectively to their former positions hereunder and thereafter all rights and remedies of the Trustee and the Holders shall continue as though no such proceeding had been instituted.

SECTION 510 Rights and Remedies Cumulative.

Except as otherwise provided with respect to the replacement or payment of mutilated, destroyed, lost or stolen Securities or coupons in the last paragraph of Section 306, no right or remedy herein conferred upon or reserved to the Trustee or to the Holders of Securities or coupons is intended to be exclusive of any other right or remedy, and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other appropriate right or remedy.

SECTION 511 Delay or Omission Not Waiver.

No delay or omission of the Trustee or of any Holder of any Security or coupon to exercise any right or remedy accruing upon any Event of Default shall impair any such right or remedy or constitute a waiver of any such Event of Default or an acquiescence therein. Every right and remedy given by this Article or by law to the Trustee or to the Holders may be exercised from time to time, and as often as may be deemed expedient, by the Trustee or by the Holders of Securities or coupons, as the case may be.

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SECTION 512 Control by Holders of Securities.

The Holders of a majority in principal amount of the Outstanding Securities of any series shall have the right to direct the time, method and place of conducting any proceeding for any remedy available to the Trustee or exercising any trust or power conferred on the Trustee with respect to the Securities of such series, provided that

(1) such direction shall not be in conflict with any rule of law or with this Indenture,

(2) the Trustee may take any other action deemed proper by the Trustee which is not inconsistent with such direction, and

(3) the Trustee need not take any action which might involve it in personal liability or be unjustly prejudicial to the Holders of Securities of such series not consenting.

SECTION 513 Undertaking for Costs.

All parties to this Indenture agree that in any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as a Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorney's fees and expenses, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant, provided that this
Section 513 shall not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 508 hereof, or a suit by Holders of more than 10% in principal amount of the then Outstanding Securities.

SECTION 514 Waiver of Past Defaults.

The Holders of not less than a majority in principal amount of the Outstanding Securities of any series may on behalf of the Holders of all the Securities of such series and any related coupons waive any past default hereunder with respect to such series and its consequences, except a default

(1) in the payment of the principal of (or premium, if any) or interest, if any, or Additional Amounts on any Security of such series or any related coupons, or

(2) in respect of a covenant or provision hereof which under Article Nine cannot be modified or amended without the consent of the Holder of each Outstanding Security of such series affected.

Upon any such waiver, such default shall cease to exist, and any Event of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture; but no such waiver shall extend to any subsequent or other default or Event of Default or impair any right consequent thereon.

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SECTION 515 Waiver of Usury, Stay or Extension Laws.

Each of the Company and the Subsidiary Guarantors covenants (to the extent that it may lawfully do so) that it will not at any time insist upon, or plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law or any usury or other law wherever enacted, now or at any time hereafter in force, which may affect the covenants or the performance of this Indenture; and each of the Company and the Subsidiary Guarantors (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law, and covenants that it will not hinder, delay or impede the execution of any power herein granted to the Trustee, but will suffer and permit the execution of every such power as though no such law had been enacted.

ARTICLE SIX

THE TRUSTEE

SECTION 601 Notice of Defaults.

Within five days after the earlier of receipt from the Company of notice of the occurrence of a Default or Event of Default hereunder or the date such occurrence hereunder actually becomes known to a Responsible Officer of the Trustee, the Trustee shall transmit to all Holders of Securities of such series, in the manner and to the extent provided in TIA Section 313(c), notice of such Default hereunder known to the Trustee, unless such Default shall have been cured or waived; provided, however, that, except in the case of a Default in the payment of the principal of (or premium, if any) or interest, if any, on any Security of such series, or in the payment of any sinking or purchase fund installment with respect to the Securities of such series, the Trustee shall be protected in withholding such notice if and so long as the board of directors, the executive committee or a trust committee of directors and/or Responsible Officers of the Trustee in good faith determines that the withholding of such notice is in the interests of the Holders of the Securities and coupons of such series; and provided further that in the case of any Default or breach of the character specified in Section 501(4) with respect to the Securities and coupons of such series, no such notice to Holders shall be given until at least 60 days after the occurrence thereof unless otherwise specified in accordance with
Section 301.

SECTION 602 Certain Rights of Trustee.

Subject to the provisions of TIA Section 315(a) through 315(d):

(1) The Trustee undertakes to perform such duties and only such duties as are specifically set forth in this Indenture, and no implied covenants or obligations shall be read into this Indenture against the Trustee.

(2) The Trustee may conclusively rely and shall be protected in acting or refraining from acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, coupon or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties.

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(3) Any request or direction of the Company mentioned herein shall be sufficiently evidenced by a Company Request or Company Order (other than delivery of any Security, together with any coupons appertaining thereto, to the Trustee for authentication and delivery pursuant to Section 303 which shall be sufficiently evidenced as provided therein) and any resolution of the Board of Directors may be sufficiently evidenced by a Board Resolution.

(4) The Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts.

(5) The Trustee shall not be liable with respect to any action taken or omitted to be taken by it in good faith in accordance with the direction of the Holders of a majority in principal amount of the Outstanding Securities of any series, determined as provided in Sections 101 and 104.

(6) Whenever in the administration of this Indenture the Trustee shall deem it desirable that a matter be proved or established prior to taking, suffering or omitting any action hereunder, the Trustee (unless other evidence be herein specifically prescribed) may, in the absence of bad faith on its part, rely upon a Board Resolution, an Opinion of Counsel or an Officers' Certificate.

(7) The Trustee may consult with counsel of its choosing and the advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon.

(8) The Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders of Securities of any series or any related coupons pursuant to this Indenture, unless such Holders shall have offered to the Trustee security or indemnity reasonably satisfactory to the Trustee against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction.

(9) The Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, coupon or other paper or document, but the Trustee, in its discretion, may make such further inquiry or investigation into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled to examine the books, records and premises of the Company, personally or by agent or attorney but in the case of any certificate or opinion specifically required by the Indenture to be delivered to the Trustee, the Trustee shall have a duty to examine the same to determine whether they conform to the Indenture requirements.

(10) The Trustee may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys and the Trustee

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shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed with due care by it hereunder.

(11) The Trustee shall not be liable for any action taken, suffered or omitted by it in good faith and believed by it to be authorized or within the discretion or rights or powers conferred upon it by this Indenture other than any liabilities arising out of the negligence of the Trustee.

(12) The rights, privileges, protections, immunities and benefits given to the Trustee, including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and to each agent, custodian and other Person employed to act hereunder.

(13) The Trustee may request that the Company deliver an Officers' Certificate setting forth the names of individuals and/or titles of officers authorized at such time to take specified actions pursuant to this Indenture, which Officers' Certificate may be signed by any person authorized to sign an Officers' Certificate, including any person specified as so authorized in any such certificate previously delivered and not superseded.

The Trustee shall not be required to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder, or in the exercise of any of its rights or powers, if it shall have reasonable grounds for believing that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it.

SECTION 603 Not Responsible for Recitals or Issuance of Securities.

The recitals contained herein and in the Securities, except the Trustee's certificate of authentication, and in any coupons shall be taken as the statements of the Company, and neither the Trustee nor any Authenticating Agent assumes any responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Indenture or of the Securities or coupons, except that the Trustee represents that it is duly authorized to execute and deliver this Indenture, authenticate the Securities and perform its obligations hereunder and that the statements made by it in a Statement of Eligibility on Form T-1 supplied to the Company are true and accurate, subject to the qualifications set forth therein. Neither the Trustee nor any Authenticating Agent shall be accountable for the use or application by the Company of Securities or the proceeds thereof.

SECTION 604 May Hold Securities.

The Trustee, any Paying Agent, Security Registrar, Authenticating Agent or any other agent of the Company or the Subsidiary Guarantors, in its individual or any other capacity, may become the owner or pledgee of Securities and coupons and, subject to TIA Sections 310(b) and 311, may otherwise deal with the Company with the same rights it would have if it were not Trustee, Paying Agent, Security Registrar, Authenticating Agent or such other agent.

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SECTION 605 Money Held in Trust.

Money held by the Trustee in trust hereunder need not be segregated from other funds except to the extent required by law. The Trustee shall be under no liability for interest on any money received by it hereunder except as otherwise agreed with the Company.

SECTION 606 Compensation and Reimbursement.

The Company agrees:

(1) to pay to the Trustee from time to time such compensation for all services rendered by it hereunder as shall be agreed upon in writing from time to time (which compensation shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust);

(2) except as otherwise expressly provided herein, to reimburse each of the Trustee and any predecessor Trustee upon its request for all reasonable expenses, disbursements and advances incurred or made by the Trustee in accordance with any provision of this Indenture (including the reasonable compensation and the expenses and disbursements of its agents and counsel), except any such expense, disbursement or advance as may be attributable to its negligence or bad faith; and

(3) to indemnify each of the Trustee and any predecessor Trustee for, and to hold it harmless against, any loss, damage, claims, liability or expense incurred without negligence or bad faith on its own part, arising out of or in connection with the acceptance or administration of the trust or trusts hereunder, including the costs and expenses of defending itself against any claim (whether asserted by the Company or any Holder or any other Person) or liability in connection with the exercise or performance of any of its powers or duties hereunder.

As security for the performance of the obligations of the Company under this Section, the Trustee shall have a claim prior to the Securities upon all property and funds held or collected by the Trustee as such, except funds held in trust for the payment of principal of (or premium, if any) or interest, if any, on particular Securities or any coupons.

When the Trustee incurs expenses or renders services after an Event of Default specified in Section 501(5) or (6) occurs, the expenses and compensation for the services are intended to constitute expenses of administration under any Bankruptcy Law.

SECTION 607 Corporate Trustee Required; Eligibility.

There shall at all times be a Trustee hereunder which shall be eligible to act as Trustee under TIA Section 310(a)(1) and shall have a combined capital and surplus of at least $50,000,000. If such corporation publishes reports of condition at least annually, pursuant to law or the requirements of Federal, State, Territorial or District of Columbia supervising or examining authority, then for the purposes of this Section, the combined capital and surplus of such corporation shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. If at any time the Trustee shall cease to be eligible in

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accordance with the provisions of this Section, it shall resign immediately in the manner and with the effect hereinafter specified in this Article.

SECTION 608 Resignation and Removal; Appointment of Successor.

(a) No resignation or removal of the Trustee and no appointment of a successor Trustee pursuant to this Article shall become effective until the acceptance of appointment by the successor Trustee in accordance with the applicable requirements of Section 609.

(b) The Trustee may resign at any time with respect to the Securities of one or more series by giving written notice thereof to the Company.

(c) The Trustee may be removed at any time with respect to the Securities of any series by Act of the Holders of a majority in principal amount of the Outstanding Securities of such series delivered to the Trustee and to the Company.

(d) If at any time:

(1) the Trustee shall fail to comply with the provisions of TIA Section 310(b) after written request therefor by the Company or by any Holder of a Security who has been a bona fide Holder of a Security for at least six months, or

(2) the Trustee shall cease to be eligible under Section 607 and shall fail to resign after written request therefor by the Company or by any Holder of a Security who has been a bona fide Holder of a Security for at least six months, or

(3) the Trustee shall become incapable of acting or shall be adjudged a bankrupt or insolvent or a receiver of the Trustee or of its property shall be appointed or any public officer shall take charge or control of the Trustee or of its property or affairs for the purpose of rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by or pursuant to a Board Resolution may remove the Trustee and appoint a successor Trustee with respect to all Securities, or (ii) subject to TIA Section 315(e), any Holder of a Security who has been a bona fide Holder of a Security for at least six months may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the removal of the Trustee with respect to all Securities and the appointment of a successor Trustee or Trustees.

(e) If an instrument of acceptance by a successor Trustee shall not have been delivered to the Trustee within 30 days after the giving of a notice of resignation or the delivery of an Act of removal, the Trustee resigning or being removed or any Holder who has been a bona fide Holder of Securities for at least six months, may petition any court of competent jurisdiction for the appointment of a successor Trustee.

(f) If the Trustee shall resign, be removed or become incapable of acting, or if a vacancy shall occur in the office of Trustee for any cause with respect to the Securities of one or more series, the Company, by or pursuant to a Board Resolution, shall promptly appoint a successor Trustee or Trustees with respect to the Securities of that or those series (it being

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understood that any such successor Trustee may be appointed with respect to the Securities of one or more or all of such series and that at any time there shall be only one Trustee with respect to the Securities of any particular series). If, within one year after such resignation, removal or incapability, or the occurrence of such vacancy, a successor Trustee with respect to the Securities of any series shall be appointed by Act of the Holders of a majority in principal amount of the Outstanding Securities of such series delivered to the Company and the retiring Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance of such appointment, become the successor Trustee with respect to the Securities of such series and to that extent supersede the successor Trustee appointed by the Company. If no successor Trustee with respect to the Securities of any series shall have been so appointed by the Company or the Holders of Securities and accepted appointment in the manner hereinafter provided, any Holder of a Security who has been a bona fide Holder of a Security of such series for at least six months may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the appointment of a successor Trustee with respect to Securities of such series.

(g) The Company shall give notice of each resignation and each removal of the Trustee with respect to the Securities of any series and each appointment of a successor Trustee with respect to the Securities of any series in the manner provided for notices to the Holders of Securities in Section 106. Each notice shall include the name of the successor Trustee with respect to the Securities of such series and the address of its Corporate Trust Office.

SECTION 609 Acceptance of Appointment by Successor.

(a) In case of the appointment hereunder of a successor Trustee with respect to all Securities, every such successor Trustee shall execute, acknowledge and deliver to the Company and to the retiring Trustee an instrument accepting such appointment, and thereupon the resignation or removal of the retiring Trustee shall become effective and such successor Trustee, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and duties of the retiring Trustee; but, on request of the Company or the successor Trustee, such retiring Trustee shall, upon payment of its charges, execute and deliver an instrument transferring to such successor Trustee all the rights, powers and trusts of the retiring Trustee, and shall duly assign, transfer and deliver to such successor Trustee all property and money held by such retiring Trustee hereunder, subject nevertheless to its claim, if any, provided for in Section 606.

(b) In case of the appointment hereunder of a successor Trustee with respect to the Securities of one or more (but not all) series, the Company, the Subsidiary Guarantors, if applicable, the retiring Trustee and each successor Trustee with respect to the Securities of one or more series shall execute and deliver an indenture supplemental hereto wherein each successor Trustee shall accept such appointment and which (1) shall contain such provisions as shall be necessary or desirable to transfer and confirm to, and to vest in, each successor Trustee all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series to which the appointment of such successor Trustee relates, (2) if the retiring Trustee is not retiring with respect to all Securities, shall contain such provisions as shall be deemed necessary or desirable to confirm that all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series as to which the retiring Trustee is not retiring shall continue to be vested in the retiring Trustee, and (3) shall add to or

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change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one Trustee, it being understood that nothing herein or in such supplemental indenture shall constitute such Trustees co-trustees of the same trust and that each such Trustee shall be trustee of a trust or trusts hereunder separate and apart from any trust or trusts hereunder administered by any other such Trustee; and upon the execution and delivery of such supplemental indenture the resignation or removal of the retiring Trustee shall become effective to the extent provided therein and each such successor Trustee, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series to which the appointment of such successor Trustee relates; but, on request of the Company or any successor Trustee, such retiring Trustee shall duly assign, transfer and deliver to such successor Trustee all property and money held by such retiring Trustee hereunder with respect to the Securities of that or those series to which the appointment of such successor Trustee relates.

(c) Upon request of any such successor Trustee, the Company shall execute any and all instruments for more fully and certainly vesting in and confirming to such successor Trustee all such rights, powers and trusts referred to in paragraph (a) or (b) of this Section, as the case may be.

(d) No successor Trustee shall accept its appointment unless at the time of such acceptance such successor Trustee shall be qualified and eligible under this Article.

SECTION 610 Merger, Conversion, Consolidation or Succession to Business.

Any corporation into which the Trustee may be merged or converted or with which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which the Trustee shall be a party, or any corporation succeeding to all or substantially all of the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder, provided such corporation shall be otherwise qualified and eligible under this Article, without the execution or filing of any paper or any further act on the part of any of the parties hereto. In case any Securities or coupons shall have been authenticated, but not delivered, by the Trustee then in office, any successor by merger, conversion or consolidation to such authenticating Trustee may adopt such authentication and deliver the Securities or coupons so authenticated with the same effect as if such successor Trustee had itself authenticated such Securities or coupons. In case any Securities or coupons shall not have been authenticated by such predecessor Trustee, any such successor Trustee may authenticate and deliver such Securities or coupons, in either its own name or that of its predecessor Trustee, with the full force and effect which this Indenture provides for the certificate of authentication of the Trustee.

SECTION 611 Appointment of Authenticating Agent.

At any time when any of the Securities remain Outstanding, the Trustee may appoint an Authenticating Agent or Agents with respect to one or more series of Securities which shall be authorized to act on behalf of the Trustee to authenticate Securities of such series issued upon exchange, registration of transfer or partial redemption thereof, and Securities so authenticated shall be entitled to the benefits of this Indenture and shall be valid and obligatory for all purposes as if authenticated by the Trustee hereunder. Any such appointment shall be

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evidenced by an instrument in writing signed by a Responsible Officer of the Trustee, a copy of which instrument shall be promptly furnished to the Company. Wherever reference is made in this Indenture to the authentication and delivery of Securities by the Trustee or the Trustee's certificate of authentication, such reference shall be deemed to include authentication and delivery on behalf of the Trustee by an Authenticating Agent and a certificate of authentication executed on behalf of the Trustee by an Authenticating Agent. Each Authenticating Agent shall be reasonably acceptable to the Company and, except as may otherwise be provided pursuant to Section 301, shall at all times be a bank or trust company or corporation organized and doing business and in good standing under the laws of the United States of America or of any State or the District of Columbia, authorized under such laws to act as Authenticating Agent, having a combined capital and surplus of not less than $50,000,000 and subject to supervision or examination by Federal or State authorities. If such Authenticating Agent publishes reports of condition at least annually, pursuant to law or the requirements of the aforesaid supervising or examining authority, then for the purposes of this Section, the combined capital and surplus of such Authenticating Agent shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. In case at any time an Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, such Authenticating Agent shall resign immediately in the manner and with the effect specified in this Section.

Any corporation into which an Authenticating Agent may be merged or converted or with which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which such Authenticating Agent shall be a party, or any corporation succeeding to the corporate agency or corporate trust business of an Authenticating Agent, shall continue to be an Authenticating Agent, provided such corporation shall be otherwise eligible under this Section, without the execution or filing of any paper or further act on the part of the Trustee or the Authenticating Agent.

An Authenticating Agent for any series of Securities may at any time resign by giving written notice of resignation to the Trustee for such series and to the Company. The Trustee for any series of Securities may at any time terminate the agency of an Authenticating Agent by giving written notice of termination to such Authenticating Agent and to the Company. Upon receiving such a notice of resignation or upon such a termination, or in case at any time such Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, the Trustee for such series may appoint a successor Authenticating Agent which shall be acceptable to the Company and shall give notice of such appointment to all Holders of Securities of the series with respect to which such Authenticating Agent will serve in the manner set forth in
Section 106. Any successor Authenticating Agent upon acceptance of its appointment hereunder shall become vested with all the rights, powers and duties of its predecessor hereunder, with like effect as if originally named as an Authenticating Agent herein. No successor Authenticating Agent shall be appointed unless eligible under the provisions of this Section.

The Company agrees to pay to each Authenticating Agent from time to time reasonable compensation including reimbursement of its reasonable expenses for its services under this Section.

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If an appointment with respect to one or more series is made pursuant to this Section, the Securities of such series may have endorsed thereon, in addition to or in lieu of the Trustee's certificate of authentication, an alternate certificate of authentication substantially in the following form:

This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.

THE BANK OF NEW YORK
as Trustee

By
as Authenticating Agent

By
Authorized Signatory

SECTION 612 Conflicting Interests.

(a) The Trustee shall comply with the provisions of Section 310(b) of the Trust Indenture Act.

(b) The indenture dated as of December 16, 1996, for the Company's 10 3/4% Senior Subordinated Notes due 2006 between the Company and The Bank of New York shall be deemed to be specifically described herein for the purposes of clause (i) of the first proviso contained in Section 310(b) of the TIA.

SECTION 613 Appointment of Co-Trustee.

(A) For the purpose of meeting any legal requirements of any jurisdiction in which the Company may at the time be located in connection with the enforcement of any right or the taking of any action on behalf of the Holders of any Securities issued hereunder, the Trustee shall have the power and may execute and deliver all instruments necessary to appoint one or more Persons to act as a co-trustee or co-trustees, or separate trustee or separate trustees, such powers, duties, obligations, rights and trusts as the Trustee may consider necessary or desirable. Each co-trustee or separate trustee hereunder shall be required to meet the terms of eligibility as a trustee under Section 607. The Trustee shall promptly notify the Holders and the Company of the appointment of a co-trustee or separate trustee under this section.

(B) Every separate trustee and co-trustee shall, to the extent permitted by law, be appointed and act subject to the following provisions and conditions:

(a) all rights, powers, duties and obligations conferred or imposed upon the Trustee shall be conferred or imposed upon and exercised or performed by the Trustee and such separate trustee or co-trustee jointly (it being understood that such separate trustee or co-trustee is not authorized to act separately without the Trustee joining in such act), except to the extent that under any law of any jurisdiction in which any particular act or acts are to be performed the Trustee shall be incompetent or

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unqualified to perform such act or acts, in which event such rights, powers, duties and obligations shall be exercised and performed singly by such separate trustee or co-trustee, but solely at the direction of the Trustee;

(b) no trustee hereunder shall be personally liable by reason of any act or omission of any other trustee hereunder;

(c) the Trustee may at any time accept the resignation of or remove any separate trustee or co-trustee;

(d) any notice, request or other writing given to the Trustee shall be deemed to have been given to each of the then separate trustees and co-trustees, as effectively as if given to each of them. Every instrument appointing any separate trustee or co-trustee shall refer to this Indenture and the conditions of this Article Six. Each separate trustee and co-trustee, upon its acceptance of the trusts conferred, shall be vested with the estates or property specified in its instrument of appointment, either jointly with the Trustee or separately, as may be provided therein, subject to all the provisions of this Indenture, specifically including every provision of this Indenture relating to the conduct of, affecting the liability of, or affording protection or rights (including the rights to compensation, reimbursement and indemnification hereunder) to, the Trustee. Every such instrument shall be filed with the Trustee; and

(e) any separate trustee or co-trustee may at any time constitute the Trustee its agent or attorney-in-fact with full power and authority, to the extent not prohibited by law, to do any lawful act under or in respect of this Indenture on its behalf and in its name for the purposes of enforcing any rights or taking any other action on behalf of the Holders of any Securities issued hereunder.

SECTION 614 Trustee's Application for Instructions from the Company.

Any application by the Trustee for written instructions from the Company may, at the option of the Trustee, set forth in writing any action proposed to be taken or omitted by the Trustee under this Indenture and the date on and/or after which such action shall be taken or such omission shall be effective. The Trustee shall not be liable for any action taken by, or omission of, the Trustee in accordance with a proposal included in such application on or after the date specified in such application (which date shall not be less than five Business Days after the date any officer of the Company actually receives such application, unless any such officer shall have consented in writing to any earlier date) unless prior to taking any such action (or the effective date in the case of an omission), the Trustee shall have received written instructions in response to such application specifying the action to be taken or omitted.

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ARTICLE SEVEN

HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701 Disclosure of Names and Addresses of Holders.

The Company will furnish or cause to be furnished to the Trustee:

(A) semiannually, not later than 15 days after each Regular Record Date for Securities of each series at the time Outstanding, a list in such form as the Trustee may reasonably require, of the names and addresses of the Holders of Registered Securities as of such Regular Record Date, or if there is no Regular Record Date for interest for such series of Securities, semiannually, upon such dates as are set forth in the Board Resolution, Officers' Certificates indenture supplemental hereto authorizing such series, and

(B) at such other times as the Trustee may request in writing, within 30 days after the receipt by the Company of any such request, a list of similar form and content as of a date not more than 15 days prior to the time such list is furnished;

provided, however, that so long as the Trustee is the Security Registrar, no such list shall be required to be furnished.

The Trustee shall preserve, in as current a form as is reasonably practicable, the names and addresses of Holders contained in the most recent list furnished to the Trustee as provided in Section 701 and the names and addresses of Holders received by the Trustee in its capacity as Security Registrar. The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

The rights of the Holders to communicate with other Holders with respect to their rights under this Indenture or under the Securities, and the corresponding rights and privileges of the Trustee, shall be as provided by the Trust Indenture Act.

Every Holder of Securities or coupons, by receiving and holding the same, agrees with the Company, the Subsidiary Guarantors and the Trustee that neither the Company nor any Subsidiary Guarantor nor the Trustee nor any Authenticating Agent nor any Paying Agent nor any Security Registrar shall be held accountable by reason of the disclosure of any information as to the names and addresses of the Holders of Securities in accordance with TIA
Section 312, regardless of the source from which such information was derived, and that the Trustee shall not be held accountable by reason of mailing any material pursuant to a request made under TIA Section 312(b).

SECTION 702 Reports by Trustee.

Within 60 days after May 15 of each year commencing with the first May 15 after the first issuance of Securities pursuant to this Indenture, the Trustee shall transmit by mail to all Holders of Securities as provided in TIA Section 313(c) a brief report dated as of such May 15 if required by TIA
Section 313(a).

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A copy of each such report shall, at the time of such transmission to Holders, be filed by the Trustee with each stock exchange, if any, upon which the Securities are listed, with the Commission and with the Company. The Company will promptly notify the Trustee of the listing of the Securities on any stock exchange.

SECTION 703 Reports by Company and Subsidiary Guarantors.

The Company and, so long as any Securities in respect of which its Subsidiary Guarantees have been issued are Outstanding, each of the Subsidiary Guarantors, will:

(1) file with the Trustee, within 15 days after the Company or such Subsidiary Guarantor, as the case may be, is required to file the same with the Commission, copies of the annual reports and of the information, documents, and other reports (or copies of such portions of any of the foregoing as the Commission may from time to time by rules and regulations prescribe) which the Company or such Subsidiary Guarantor, as the case may be, may be required to file with the Commission pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934; or, if the Company or such Subsidiary Guarantor is not required to file information, documents or reports pursuant to either of such Sections, then it will file with the Trustee and the Commission, in accordance with rules and regulations prescribed from time to time by the Commission, such of the supplementary and periodic information, documents and reports which may be required pursuant to
Section 13 of the Securities Exchange Act of 1934 in respect of a security listed and registered on a national securities exchange as may be prescribed from time to time in such rules and regulations;

(2) file with the Trustee and the Commission, in accordance with rules and regulations prescribed from time to time by the Commission, such additional information, documents and reports with respect to compliance by the Company or such Subsidiary Guarantor, as the case may be, with the conditions and covenants of this Indenture as may be required from time to time by such rules and regulations; and

(3) transmit by mail to the Holders of Securities, within 30 days after the filing thereof with the Trustee, in the manner and to the extent provided in TIA Section 313(c), such summaries of any information, documents and reports required to be filed by the Company or such Subsidiary Guarantor, as the case may be, pursuant to paragraphs (1) and (2) of this Section as may be required by rules and regulations prescribed from time to time by the Commission.

SECTION 704 Calculation of Original Issue Discount.

Upon request of the Trustee, the Company shall file with the Trustee promptly at the end of each calendar year (i) a written notice specifying the amount of original issue discount (including daily rates and accrual periods), if any, accrued on Outstanding Securities as of the end of such year and (ii) such other specific information relating to such original issue discount as may then be relevant under the Internal Revenue Code of 1986, as amended from time to time.

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ARTICLE EIGHT

CONSOLIDATION, MERGER, CONVEYANCE OR TRANSFER

SECTION 801 Company May Consolidate, Etc., Only on Certain Terms.

The Company shall not consolidate with or merge with or into any other Person or convey or transfer its properties and assets substantially as an entirety to any Person, unless:

(1) either the Company shall be the continuing corporation, or the corporation (if other than the Company) formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance or transfer the properties and assets of the Company substantially as an entirety shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all of the obligations of the Company under this Indenture and on all the Securities and this Indenture;

(2) immediately after giving effect to such transaction, no Default or Event of Default shall have occurred and be continuing; and

(3) the Company and the successor Person have delivered to the Trustee an Officers' Certificate and an Opinion of Counsel each stating that such consolidation, merger, conveyance or transfer and such supplemental indenture comply with this Article and that all conditions precedent herein provided for relating to such transaction have been complied with.

SECTION 802 Successor Person Substituted.

Upon any consolidation or merger, or any conveyance or transfer of the properties and assets of the Company substantially as an entirety in accordance with Section 801, the successor corporation formed by such consolidation or into which the Company is merged or the successor Person to which such conveyance or transfer is made shall succeed to, and be substituted for, and may exercise every right and power of, the Company under this Indenture with the same effect as if such successor had been named as the Company herein; and in the event of any such conveyance or transfer (except by a lease), the Company shall be discharged from all its obligations and covenants under this Indenture and the Securities and coupons and may be dissolved and liquidated.

Such successor entity thereupon may cause to be signed, and may issue either in its own name or in the name of the Company, any or all of the Securities issuable hereunder which theretofore shall not have been signed by the Company and delivered to the Trustee; and, upon the order of such successor entity, instead of the Company, and subject to all the terms, conditions and limitations prescribed in this Indenture, the Trustee shall authenticate and shall deliver any Securities which previously shall have been signed and delivered by the officers of the Company to the Trustee for authentication, and any Securities which such successor entity thereafter shall cause to be signed and delivered to the Trustee for that purpose. All the Securities of any series so issued shall in all respects have the same legal rank and benefit under this Indenture as the Securities of such series theretofore or thereafter issued in accordance with

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the terms of this Indenture as though all of such Securities had been issued at the date of the execution hereof.

In case of any such merger in which the Company is not the surviving corporation or any such consolidation, sale, lease, assignment, transfer or conveyance, such changes in phraseology and form (but not in substance) may be made in the Securities thereafter to be issued as may be appropriate.

SECTION 803 Officers' Certificate and Opinion of Counsel.

Any consolidation, merger, sale, conveyance, assignment, transfer or lease permitted under Section 801 is also subject to the condition that the Trustee shall have received an Officers' Certificate and an Opinion of Counsel to the effect that any such consolidation, merger, sale, conveyance, transfer, assignment or lease, and the assumption by any successor Person and any such supplemental indenture, comply with the provisions of this Article and that all conditions precedent herein provided for relating to such transaction have been complied with.

ARTICLE NINE

SUPPLEMENTAL INDENTURES

SECTION 901 Supplemental Indentures Without Consent of Holders.

Without the consent of any Holders of Securities or coupons, the Company and, if applicable, the Subsidiary Guarantors, when authorized by or pursuant to a Board Resolution, and the Trustee, at any time and from time to time, may enter into one or more indentures supplemental hereto, in form satisfactory to the Trustee, for any of the following purposes:

(1) to evidence the succession of another Person to the Company or any Subsidiary Guarantor and the assumption by any such successor of the covenants of the Company or such Subsidiary Guarantor herein and in the Securities contained; or

(2) to add to the covenants of the Company or the Subsidiary Guarantors for the benefit of the Holders of all or any series of Securities (and if such covenants are to be for the benefit of less than all series of Securities, stating that such covenants are expressly being included solely for the benefit of such series) or to surrender any right or power herein conferred upon the Company or the Subsidiary Guarantors; or

(3) to add any additional Events of Default for the benefit of the Holders of all or any series of Securities (and if such Events of Default are to be for the benefit of less than all series of Securities, stating that such Events of Default are expressly being included solely for the benefit of such series); provided, however, that in respect of any such additional Events of Default such supplemental indenture may provide for a particular period of grace after default (which period may be shorter or longer than that allowed in the case of other defaults) or may provide for an immediate enforcement upon such default or may limit the remedies available to the Trustee upon such default or may limit

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the right of the Holders of a majority in aggregate principal amount of that or those series of Securities to which such additional Events of Default apply to waive such default; or

(4) to add to or change any of the provisions of this Indenture to provide that Bearer Securities may be registrable as to principal, to change or eliminate any restrictions on the payment of principal of or any premium or interest on Bearer Securities, to permit Bearer Securities to be issued in exchange for Registered Securities, to permit Bearer Securities to be issued in exchange for Bearer Securities of other authorized denominations or to permit or facilitate the issuance of Securities in uncertificated form; provided that any such action shall not adversely affect the interests of the Holders of Securities of any series or any related coupons in any material respect; or

(5) to change or eliminate any of the provisions of this Indenture; provided that any such change or elimination shall become effective only when there is no Security Outstanding of any series created prior to the execution of such supplemental indenture which is entitled to the benefit of such provision; or

(6) to secure the Securities pursuant to the requirements of such indenture supplement, if applicable; or

(7) to establish the form or terms of Securities of any series and any related coupons as permitted by Sections 201 and 301, including the provisions and procedures relating to Securities convertible into or exchangeable for any securities of any Person (including the Company); or

(8) to evidence and provide for the acceptance of appointment hereunder by a successor Trustee with respect to the Securities of one or more series and to add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one Trustee; or

(9) to cure any ambiguity, to correct or supplement any provision herein which may be inconsistent with any other provision herein, or to make any other provisions with respect to matters or questions arising under this Indenture; provided that such action shall not adversely affect the interests of the Holders of Securities of any series or any related coupons in any material respect; or

(10) to supplement any of the provisions of this Indenture to such extent as shall be necessary to permit or facilitate the defeasance and discharge of any series of Securities pursuant to Sections 401, 1402 and 1403; provided that any such action shall not adversely affect the interests of the Holders of Securities of such series and any related coupons or any other series of Securities in any material respect; or

(11) to add a guarantor or guarantors for any series or all series of the Securities; or

(12) to comply with the requirements of the Commission in order to effect or maintain the qualification of this Indenture under the TIA.

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SECTION 902 Supplemental Indentures with Consent of Holders.

With the consent of the Holders of not less than a majority in principal amount of all Outstanding Securities affected by such supplemental indenture, with each series voting separately, by Act of said Holders delivered to the Company and the Trustee, the Company and, if applicable, the Subsidiary Guarantors, when authorized by or pursuant to a Board Resolution, and the Trustee may enter into an indenture or indentures supplemental hereto for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or of modifying in any manner the rights of the Holders of Securities and any related coupons under this Indenture; provided, however, that no such supplemental indenture shall, without the consent of the Holder of each Outstanding Security affected thereby:

(1) change the Stated Maturity of the principal of (or premium, if any, on) or any installment of principal of or interest on, any Security, subject to the provisions of Section 308; or reduce the principal amount thereof or the rate of interest (or change the manner of calculation of interest), thereon, or any Additional Amounts with respect thereto, or any premium payable upon the redemption thereof, or change any obligation of the Company to pay Additional Amounts pursuant to Section 1005 (except as contemplated by Section 801(1) and permitted by Section 901(1)), or reduce the portion of the principal of an Original Issue Discount Security or Indexed Security that would be due and payable upon a declaration of acceleration of the Maturity thereof pursuant to Section 502 or the amount thereof provable in bankruptcy pursuant to Section 504, or adversely affect any right of repayment at the option of the Holder of any Security, or change any Place of Payment where, or the Currency in which, any Security or any premium or interest or Additional Amount thereon is payable, or impair the right to institute suit for the enforcement of any such payment on or after the Stated Maturity thereof (or, in the case of redemption or repayment at the option of the Holder, on or after the Redemption Date or the Repayment Date, as the case may be), or adversely affect any right to convert or exchange any Security as may be provided pursuant to Section 301 herein, or

(2) reduce the percentage in principal amount of the Outstanding Securities of any series, the consent of whose Holders is required for any such supplemental indenture, or the consent of whose Holders is required for any waiver with respect to such series (of compliance with certain provisions of this Indenture or certain defaults hereunder and their consequences) provided for in this Indenture, or reduce the requirements of Section 1504 for quorum or voting, or

(3) modify any of the provisions of this Section, Section 513 or Section 1006, except to increase any such percentage or to provide that certain other provisions of this Indenture cannot be modified or waived without the consent of the Holder of each Outstanding Security affected thereby, or

(4) cause the Securities to be expressly subordinated to other indebtedness of the Company.

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It shall not be necessary for any Act of Holders under this
Section to approve the particular form of any proposed supplemental indenture, but it shall be sufficient if such Act shall approve the substance thereof.

A supplemental indenture which changes or eliminates any covenant or other provision of this Indenture which has expressly been included solely for the benefit of one or more particular series of Securities, or which modifies the rights of the Holders of Securities of such series with respect to such covenant or other provision, shall be deemed not to affect the rights under this Indenture of the Holders of Securities of any other series.

The Company may, but shall not be obligated to, fix a record date for the purpose of determining the Persons entitled to consent to any indenture supplemental hereto. If a record date is fixed, the Holders at the close of Business on such record date, or their duly designated proxies, and only such Persons, shall be entitled to consent to such supplemental indenture, whether or not such Holders remain Holders after such record date; provided that unless such consent shall have become effective by virtue of the requisite percentage having been obtained prior to the date which is 90 days after such record date, any such consent previously given shall automatically and without further action by any Holder be cancelled and of no further effect.

SECTION 903 Execution of Supplemental Indentures.

In executing, or accepting the additional trusts created by, any supplemental indenture permitted by this Article or the modification thereby of the trusts created by this Indenture, the Trustee shall be entitled to receive, and shall be fully protected in relying upon (subject to the provisions of Article Six hereof), an Opinion of Counsel stating that the execution of such supplemental indenture is authorized or permitted by this Indenture. The Trustee may, but shall not be obligated to, enter into any such supplemental indenture which affects the Trustee's own rights, duties or immunities under this Indenture or otherwise.

SECTION 904 Effect of Supplemental Indentures.

Upon the execution of any supplemental indenture under this Article, this Indenture shall be modified in accordance therewith, and such supplemental indenture shall form a part of this Indenture for all purposes; and every Holder of Securities theretofore or thereafter authenticated and delivered hereunder and of any coupon appertaining thereto shall be bound thereby.

SECTION 905 Conformity with Trust Indenture Act.

Every supplemental indenture executed pursuant to this Article shall conform to the requirements of the Trust Indenture Act as then in effect.

SECTION 906 Reference in Securities to Supplemental Indentures.

Securities of any series authenticated and delivered after the execution of any supplemental indenture pursuant to this Article may, and shall, if required by the Trustee, bear a notation in form approved by the Trustee as to any matter provided for in such supplemental indenture. If the Company shall so determine, new Securities of any series so modified as to

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conform, in the opinion of the Trustee and the Company, to any such supplemental indenture may be prepared and executed by the Company and authenticated and delivered by the Trustee in exchange for Outstanding Securities of such series.

ARTICLE TEN

COVENANTS

SECTION 1001 Payment of Principal, Premium, if any, and Interest.

The Company covenants and agrees for the benefit of the Holders of each series of Securities that it will duly and punctually pay the principal of (and premium, if any) and interest and Additional Amounts, if any, on the Securities of that series in accordance with the terms of such series of Securities, any coupons appertaining thereto and this Indenture. Any interest due on Bearer Securities on or before Maturity, other than Additional Amounts, if any, payable as provided in Section 1004 in respect of principal of (or premium, if any, on) such a Security, shall be payable only upon presentation and surrender of the several coupons for such interest installments as are evidenced thereby as they severally mature. Unless otherwise specified with respect to Securities of any series pursuant to Section 301, at the option of the Company, all payments of principal may be paid by check to the registered Holder of the Registered Security or other person entitled thereto against surrender of such Security or wire transfer to an account in the United States maintained by the Payee.

SECTION 1002 Maintenance of Office or Agency.

If Securities of a series are issuable only as Registered Securities, the Company shall maintain in each Place of Payment for any series of Securities an office or agency where Securities of that series may be presented or surrendered for payment, where Securities of that series may be surrendered for registration of transfer or exchange, where Securities of that series that are convertible or exchangeable may be surrendered for conversion or exchange, as applicable, and where notices and demands to or upon the Company in respect of the Securities of that series and this Indenture may be served. If Securities of a series are issuable as Bearer Securities, the Company will maintain (A) in the Borough of Manhattan, The City of New York, an office or agency where any Registered Securities of that series may be presented or surrendered for payment, where any Registered Securities of that series may be surrendered for registration of transfer, where Securities of that series may be surrendered for exchange, where Securities of that series that are convertible or exchangeable may be surrendered for conversion or exchange, as applicable, and where notices and demands to or upon the Company in respect of the Securities of that series and this Indenture may be served and where Bearer Securities of that series and related coupons may be presented or surrendered for payment in the circumstances described in the following paragraph (and not otherwise), (B) subject to any laws or regulations applicable thereto, in a Place of Payment for that series which is located outside the United States, an office or agency where Securities of that series and related coupons may be presented and surrendered for payment; provided, however, that if the Securities of that series are listed on the Luxembourg Stock Exchange or any other stock exchange located outside the United States and such stock exchange shall so require, the Company will maintain a Paying Agent for the

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Securities of that series in Luxembourg or any other required city located outside the United States, as the case may be, so long as the Securities of that series are listed on such exchange, and (C) subject to any laws or regulations applicable thereto, in a Place of Payment for that series located outside the United States an office or agency where any Registered Securities of that series may be surrendered for registration of transfer, where Securities of that series may be surrendered for exchange, where Securities of that series that are convertible or exchangeable may be surrendered for conversion or exchange, as applicable and where notices and demands to or upon the Company in respect of the Securities of that series and this Indenture may be served. The Company will give prompt written notice to the Trustee of the location, and any change in the location, of each such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the Corporate Trust Office of the Trustee, except that Bearer Securities of that series and the related coupons may be presented and surrendered for payment at the offices specified in the Security, in London, England, and the Company hereby appoints the same as its agent to receive such respective presentations, surrenders, notices and demands, and the Company hereby appoints the Trustee its agent to receive all such presentations, surrenders, notices and demands.

Unless otherwise specified with respect to any Securities pursuant to Section 301, no payment of principal, premium or interest on Bearer Securities shall be made at any office or agency of the Company in the United States or by check mailed to any address in the United States or by transfer to an account maintained with a bank located in the United States; provided, however, that, if the Securities of a series are payable in Dollars, payment of principal of (and premium, if any) and interest, if any, on any Bearer Security shall be made at the office of the Company's Paying Agent in the Borough of Manhattan, The City of New York, if (but only if) payment in Dollars of the full amount of such principal, premium or interest, as the case may be, at all offices or agencies outside the United States maintained for such purpose by the Company in accordance with this Indenture, is illegal or effectively precluded by exchange controls or other similar restrictions.

The Company may from time to time designate one or more other offices or agencies where the Securities of one or more series may be presented or surrendered for any or all of such purposes, and may from time to time rescind such designations; provided, however, that no such designation or rescission shall in any manner relieve the Company of its obligation to maintain an office or agency in accordance with the requirements set forth above for Securities of any series for such purposes. The Company will give prompt written notice to the Trustee of any such designation or rescission and of any change in the location of any such other office or agency. Unless otherwise specified with respect to any Securities pursuant to Section 301 with respect to a series of Securities, the Company hereby designates as a Place of Payment for each series of Securities the office or agency of the Company in the Borough of Manhattan, The City of New York, and initially appoints the Trustee at its Corporate Trust Office as Paying Agent in such city and as its agent to receive all such presentations, surrenders, notices and demands.

Unless otherwise specified with respect to any Securities pursuant to Section 301, if and so long as the Securities of any series (i) are denominated in a currency other than Dollars or (ii) may be payable in a currency other than Dollars, or so long as it is required under any

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other provision of the Indenture, then the Company will maintain with respect to each such series of Securities, or as so required, at least one Exchange Rate Agent.

SECTION 1003 Money for Securities Payments to be Held in Trust.

If the Company or any Subsidiary or any Affiliate of any of them shall at any time act as Paying Agent with respect to any series of any Securities and any related coupons, it will, on or before each due date of the principal of (or premium, if any) or interest, if any, on any of the Securities of that series, segregate and hold in trust for the benefit of the Persons entitled thereto a sum in the Currency in which the Securities of such series are payable (except as otherwise specified pursuant to Section 301 for the Securities of such series and except, if applicable, as provided in Sections
312(b), 312(d) and 312(e)) sufficient to pay the principal (and premium, if any) and interest, if any, on Securities of such series so becoming due until such sums shall be paid to such Persons or otherwise disposed of as herein provided, and will promptly notify the Trustee of its action or failure so to act.

Whenever the Company shall have one or more Paying Agents for any series of Securities and any related coupons, it will, on or before each due date of the principal of (or premium, if any) or interest, if any, on any Securities of that series, deposit with a Paying Agent a sum (in the Currency described in the preceding paragraph) sufficient to pay the principal (or premium, if any) or interest, if any, so becoming due, such sum to be held in trust for the benefit of the Persons entitled to such principal, premium or interest and (unless such Paying Agent is the Trustee) the Company will promptly notify the Trustee of its action or failure so to act.

The Company may at any time, for the purpose of obtaining the satisfaction and discharge of this Indenture or for any other purpose, pay, or by Company Order direct any Paying Agent to pay, to the Trustee all sums held in trust by the Company or such Paying Agent, such sums to be held by the Trustee upon the same trusts as those upon which such sums were held by the Company or such Paying Agent; and, upon such payment by any Paying Agent to the Trustee, such Paying Agent shall be released from all further liability with respect to such sums.

Except as otherwise provided in the Securities of any series, any money deposited with the Trustee or any Paying Agent, or then held by the Company or the Subsidiary Guarantors, in trust for the payment of the principal of (or premium, if any) or interest, if any, on any Security of any series and remaining unclaimed for two years after such principal, premium or interest has become due and payable shall be paid to the Company upon Company Request or (if then held by the Company or the Subsidiary Guarantors) shall be discharged from such trust; and the Holder of such Security shall thereafter, as an unsecured general creditor, look only to the Company and, if applicable, the Subsidiary Guarantors for payment of such principal, premium or interest on any Security, without interest thereon, and all liability of the Trustee or such Paying Agent with respect to such trust money, and all liability of the Company or the Subsidiary Guarantors as trustee thereof, shall thereupon cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such repayment, may at the expense of the Company cause to be published once, in an Authorized Newspaper in each Place of Payment for such series, or mailed to each Holder of Registered Securities of such series, notice that such money remains unclaimed and that, after a date specified therein, which shall not

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be less than 30 days from the date of such publication, any unclaimed balance of such money then remaining will be repaid to the Company.

SECTION 1004 Corporate Existence.

Subject to Article Eight, the Company and, so long as any Securities in respect of which Subsidiary Guarantees have been issued are Outstanding, the Subsidiary Guarantors shall do or cause to be done all things necessary to preserve and keep in full force and effect its corporate existence and material rights and franchises (charter and statutory); provided, however, that neither the Company nor any of the Subsidiary Guarantors shall be required to preserve any such right or franchise if it shall determine that the preservation thereof is no longer necessary or desirable in the conduct of the business of the Company; and provided further, however, that the foregoing shall not prohibit a sale, transfer or conveyance of a Subsidiary or any of its assets in compliance with the terms of the Indenture.

SECTION 1005 Additional Amounts.

If any Securities of a series provide for the payment of Additional Amounts, the Company will pay to the Holder of a Security of such series or any coupon appertaining thereto Additional Amounts as may be specified as contemplated by Section 301. Whenever in this Indenture there is mentioned, in any context, the payment of the principal of (or premium, if any) or interest, if any, on any Security of any series or payment of any related coupon or the net proceeds received on the sale or exchange of any Security of any series, such mention shall be deemed to include mention of the payment of Additional Amounts provided by the terms of such series established pursuant to
Section 301 to the extent that, in such context, Additional Amounts are, were or would be payable in respect thereof pursuant to such terms and express mention of the payment of Additional Amounts (if applicable) in any provisions hereof shall not be construed as excluding Additional Amounts in those provisions hereof where such express mention is not made.

Except as otherwise specified as contemplated by Section 301, if the Securities of a series provide for the payment of Additional Amounts, at least 10 days prior to the first Interest Payment Date with respect to that series of Securities (or if the Securities of that series will not bear interest prior to Maturity, the first day on which a payment of principal and any premium is made), and at least 10 days prior to each date of payment of principal, premium or interest if there has been any change with respect to the matters set forth in the below-mentioned Officers' Certificate, the Company will furnish the Trustee and the Company's principal Paying Agent or Paying Agents, if other than the Trustee, with an Officers' Certificate instructing the Trustee and such Paying Agent or Paying Agents whether such payment of principal, premium or interest on the Securities of that series shall be made to Holders of Securities of that series or any related coupons who are not United States persons without withholding for or on account of any tax, assessment or other governmental charge described in the Securities of the series. If any such withholding shall be required, then such Officers' Certificate shall specify by country the amount, if any, required to be withheld on such payments to such Holders of Securities of that series or related coupons and the Company will pay to the Trustee or such Paying Agent the Additional Amounts required by the terms of such Securities. In the event that the Trustee or any Paying Agent, as the case may be, shall not so receive the above-mentioned certificate, then

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the Trustee or such Paying Agent shall be entitled (i) to assume that no such withholding or deduction is required with respect to any payment of principal or interest with respect to any Securities of a series or related coupons until it shall have received a certificate advising otherwise and (ii) to make all payments of principal and interest with respect to the Securities of a series or related coupons without withholding or deductions until otherwise advised. The Company covenants to indemnify the Trustee and any Paying Agent for, and to hold them harmless against, any loss, liability or expense reasonably incurred without negligence or bad faith on their part arising out of or in connection with actions taken or omitted by any of them in reliance on any Officers' Certificate furnished pursuant to this Section or in reliance on the Company's not furnishing such an Officers' Certificate.

SECTION 1006 Statement as to Compliance.

The Company and, if applicable, each of the Subsidiary Guarantors will deliver to the Trustee, within 120 days after the end of each fiscal year, a brief certificate from the principal executive officer, principal financial officer or principal accounting officer as to his or her knowledge of the Company's or such Subsidiary Guarantor's, as the case may be, compliance with all conditions and covenants under this Indenture and, if the Company or such Subsidiary Guarantor, as the case may be, is in default, specifying all such defaults and the nature and status thereof of which he or she may have knowledge. For purposes of this Section 1006, such compliance shall be determined without regard to any period of grace or requirement of notice under this Indenture.

SECTION 1007 Waiver of Certain Covenants.

With respect to the Securities of any series, the Company and the Subsidiary Guarantors may omit in any particular instance to comply with any term, provision or condition specified pursuant to Section 301 as being subject to this Section 1007, if before or after the time for such compliance the Holders of at least a majority in principal amount of all Outstanding Securities of such series, by Act of such Holders, waive such compliance in such instance or generally waive compliance with such term, provision or condition, but no such waiver shall extend to or affect such term, provision or condition except to the extent so expressly waived, and, until such waiver shall become effective, the obligations of the Company and the Subsidiary Guarantors and the duties of the Trustee in respect of any such term, provision or condition shall remain in full force and effect.

ARTICLE ELEVEN

REDEMPTION OF SECURITIES

SECTION 1101 Applicability of Article.

Securities of any series which are redeemable before their Stated Maturity shall be redeemable in accordance with their terms and (except as otherwise specified as contemplated by Section 301 for Securities of any series) in accordance with this Article.

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SECTION 1102 Election to Redeem; Notice to Trustee.

The election of the Company to redeem any Securities shall be evidenced by or pursuant to a Board Resolution. In case of any redemption at the election of the Company of less than all of the Securities of any series, the Company shall, at least 60 days prior to the Redemption Date fixed by the Company (unless a shorter notice shall be satisfactory to the Trustee), notify the Trustee in writing of such Redemption Date and of the principal amount of Securities of such series to be redeemed. In the case of any redemption of Securities prior to the expiration of any restriction on such redemption provided in the terms of such Securities or elsewhere in this Indenture, the Company shall furnish the Trustee with an Officers' Certificate evidencing compliance with such restriction.

SECTION 1103 Selection by Trustee of Securities to be Redeemed.

If less than all the Securities of any series issued on the same day with the same terms are to be redeemed, the particular Securities to be redeemed shall be selected not more than 60 days prior to the Redemption Date by the Trustee, from the Outstanding Securities of such series issued on such date with the same terms not previously called for redemption, by such method as the Trustee shall deem fair and appropriate and which may provide for the selection for redemption of portions (equal to the minimum authorized denomination for Securities of that series or any integral multiple thereof) of the principal amount of Securities of such series of a denomination larger than the minimum authorized denomination for Securities of that series.

The Trustee shall promptly notify the Company and the Security Registrar (if other than itself) in writing of the Securities selected for redemption and, in the case of any Securities selected for partial redemption, the principal amount thereof to be redeemed.

For all purposes of this Indenture, unless the context otherwise requires, all provisions relating to the redemption of Securities shall relate, in the case of any Security redeemed or to be redeemed only in part, to the portion of the principal amount of such Security which has been or is to be redeemed.

SECTION 1104 Notice of Redemption.

Notice of redemption shall be given in the manner provided in
Section 106, not less than 30 days nor more than 60 days prior to the Redemption Date, unless a shorter period is specified by the terms of such series established pursuant to Section 301, to each Holder of Securities to be redeemed, but failure to give such notice in the manner herein provided to the Holder of any Security designated for redemption as a whole or in part, or any defect in the notice to any such Holder, shall not affect the validity of the proceedings for the redemption of any other such Security or portion thereof.

Any notice that is mailed to the Holders of Registered Securities in the manner herein provided shall be conclusively presumed to have been duly given, whether or not the Holder receives the notice.

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All notices of redemption shall state:

(1) the Redemption Date,

(2) the Redemption Price and accrued interest, if any, to the Redemption Date payable as provided in Section 1106,

(3) if less than all Outstanding Securities of any series are to be redeemed, the identification (and, in the case of partial redemption, the principal amount) of the particular Security or Securities to be redeemed,

(4) in case any Security is to be redeemed in part only, the notice which relates to such Security shall state that on and after the Redemption Date, upon surrender of such Security, the Holder will receive, without a charge, a new Security or Securities of authorized denominations for the principal amount thereof remaining unredeemed,

(5) that on the Redemption Date, the Redemption Price and accrued interest, if any, to the Redemption Date payable as provided in
Section 1106 will become due and payable upon each such Security, or the portion thereof, to be redeemed and, if applicable, that interest thereon shall cease to accrue on and after said date,

(6) the Place or Places of Payment where such Securities, together in the case of Bearer Securities with all coupons appertaining thereto, if any, maturing after the Redemption Date, are to be surrendered for payment of the Redemption Price and accrued interest, if any,

(7) that the redemption is for a sinking fund, if such is the case,

(8) that, unless otherwise specified in such notice, Bearer Securities of any series, if any, surrendered for redemption must be accompanied by all coupons maturing subsequent to the date fixed for redemption or the amount of any such missing coupon or coupons will be deducted from the Redemption Price, unless security or indemnity satisfactory to the Company, the Trustee for such series and any Paying Agent is furnished,

(9) if Bearer Securities of any series are to be redeemed and any Registered Securities of such series are not to be redeemed, and if such Bearer Securities may be exchanged for Registered Securities not subject to redemption on this Redemption Date pursuant to Section 305 or otherwise, the last date, as determined by the Company, on which such exchanges may be made, and

(10) the CUSIP number of such Security, if any.

Notice of redemption of Securities to be redeemed shall be given by the Company or, at the Company's request, by the Trustee in the name and at the expense of the Company.

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SECTION 1105 Deposit of Redemption Price.

On or prior to any Redemption Date, the Company shall deposit with the Trustee or with a Paying Agent (or, if the Company is acting as its own Paying Agent, which it may not do in the case of a sinking fund payment under Article Twelve, segregate and hold in trust as provided in Section 1003) an amount of money in the Currency in which the Securities of such series are payable (except as otherwise specified pursuant to Section 301 for the Securities of such series and except, if applicable, as provided in Sections
312(b), 312(d) and 312(e)) sufficient to pay on the Redemption Date the Redemption Price of, and (unless otherwise specified pursuant to Section 301) accrued interest on, all the Securities or portions thereof which are to be redeemed on that date.

SECTION 1106 Securities Payable on Redemption Date.

Notice of redemption having been given as aforesaid, the Securities of any series so to be redeemed shall, on the Redemption Date, become due and payable at the Redemption Price therein specified in the Currency in which the Securities of such series are payable (except as otherwise specified pursuant to Section 301 for the Securities of such series and except, if applicable, as provided in Sections 312(b), 312(d) and 312(e)) (together with accrued interest, if any, to the Redemption Date), and from and after such date (unless the Company shall default in the payment of the Redemption Price and accrued interest, if any) such Securities shall if the same were interest-bearing cease to bear interest and the coupons for such interest appertaining to any Bearer Securities so to be redeemed, except to the extent provided below, shall be void. Upon surrender of any such Security for redemption in accordance with said notice, together with all coupons, if any, appertaining thereto maturing after the Redemption Date, such Security shall be paid by the Company at the Redemption Price, together with accrued interest, if any, to the Redemption Date; provided, however, that installments of interest on Bearer Securities whose Stated Maturity is on or prior to the Redemption Date shall be payable only at an office or agency located outside the United States (except as otherwise provided in Section 1002) and, unless otherwise specified as contemplated by Section 301, only upon presentation and surrender of coupons for such interest; and provided further that installments of interest on Registered Securities whose Stated Maturity is prior to (or, if specified pursuant to Section 301, on) the Redemption Date shall be payable to the Holders of such Securities, or one or more Predecessor Securities, registered as such at the close of business on the relevant Record Dates according to their terms and the provisions of Section 307.

If any Bearer Security surrendered for redemption shall not be accompanied by all appurtenant coupons maturing after the Redemption Date, such Security may be paid after deducting from the Redemption Price an amount equal to the face amount of all such missing coupons, or the surrender of such missing coupon or coupons may be waived by the Company and the Trustee if there be furnished to them such security or indemnity as they may require to save each of them and any Paying Agent harmless. If thereafter the Holder of such Security shall surrender to the Trustee or any Paying Agent any such missing coupon in respect of which a deduction shall have been made from the Redemption Price, such Holder shall be entitled to receive the amount so deducted; provided, however, that interest represented by coupons shall be payable only at an office or agency located outside the United States (except as otherwise

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provided in Section 1002) and, unless otherwise specified as contemplated by
Section 301, only upon presentation and surrender of those coupons.

If any Security called for redemption shall not be so paid upon surrender thereof for redemption, the Redemption Price shall, until paid, bear interest from the Redemption Date at the rate of interest set forth in such Security or, in the case of an Original Issue Discount Security, at the Yield to Maturity of such Security.

SECTION 1107 Securities Redeemed in Part.

Any Registered Security which is to be redeemed only in part (pursuant to the provisions of this Article or of Article Twelve) shall be surrendered at a Place of Payment therefor (with, if the Company or the Trustee so requires, due endorsement by, or a written instrument of transfer in form satisfactory to the Company and the Trustee duly executed by, the Holder thereof or his attorney duly authorized in writing) and the Company shall execute and the Trustee shall authenticate and deliver to the Holder of such Security without service charge a new Security or Securities of the same series, of any authorized denomination as requested by such Holder in aggregate principal amount equal to and in exchange for the unredeemed portion of the principal of the Security so surrendered. However, if less than all the Securities of any series with differing issue dates, interest rates and stated maturities are to be redeemed, the Company in its sole discretion shall select the particular Securities to be redeemed and shall notify the Trustee in writing thereof at least 45 days prior to the relevant redemption date.

ARTICLE TWELVE

SINKING FUNDS

SECTION 1201 Applicability of Article.

The provisions of this Article shall be applicable to any sinking fund for the retirement of Securities of a series except as otherwise specified as contemplated by Section 301 for Securities of such series.

The minimum amount of any sinking fund payment provided for by the terms of Securities of any series is herein referred to as a "mandatory sinking fund payment", and any payment in excess of such minimum amount provided for by the terms of such Securities of any series is herein referred to as an "optional sinking fund payment". If provided for by the terms of any Securities of any series, the cash amount of any mandatory sinking fund payment may be subject to reduction as provided in Section 1202. Each sinking fund payment shall be applied to the redemption of Securities of any series as provided for by the terms of Securities of such series.

SECTION 1202 Satisfaction of Sinking Fund Payments with Securities.

Except as otherwise specifically contemplated by Section 301 for Securities of such series, the Company may, in satisfaction of all or any part of any mandatory sinking fund payment with respect to the Securities of a series, (1) deliver Outstanding Securities of such

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series (other than any previously called for redemption) together in the case of any Bearer Securities of such series with all unmatured coupons appertaining thereto and (2) apply as a credit Securities of such series which have been redeemed either at the election of the Company pursuant to the terms of such Securities or through the application of permitted optional sinking fund payments pursuant to the terms of such Securities, as provided for by the terms of such Securities; provided that such Securities so delivered or applied as a credit have not been previously so credited. Such Securities shall be received and credited for such purpose by the Trustee at the applicable Redemption Price specified in such Securities for redemption through operation of the sinking fund and the amount of such mandatory sinking fund payment shall be reduced accordingly.

SECTION 1203 Redemption of Securities for Sinking Fund.

Not less than 60 days prior to each sinking fund payment date for Securities of any series, the Company will deliver to the Trustee an Officers' Certificate specifying the amount of the next ensuing mandatory sinking fund payment for that series pursuant to the terms of that series, the portion thereof, if any, which is to be satisfied by payment of cash in the Currency in which the Securities of such series are payable (except as otherwise specified pursuant to Section 301 for the Securities of such series and except, if applicable, as provided in Sections 312(b), 312(d) and 312(e)) and the portion thereof, if any, which is to be satisfied by delivering and crediting Securities of that series pursuant to Section 1202, and the optional amount, if any, to be added in cash to the next ensuing mandatory sinking fund payment, and will also deliver to the Trustee any Securities to be so delivered and credited. If such Officers' Certificate shall specify an optional amount to be added in cash to the next ensuing mandatory sinking fund payment, the Company shall thereupon be obligated to pay the amount therein specified. Not less than 30 days before each such sinking fund payment date the Trustee shall select the Securities to be redeemed upon such sinking fund payment date in the manner specified in Section 1103 and cause notice of the redemption thereof to be given in the name of and at the expense of the Company in the manner provided in
Section 1104. Such notice having been duly given, the redemption of such Securities shall be made upon the terms and in the manner stated in Sections 1106 and 1107.

ARTICLE THIRTEEN

REPAYMENT AT THE OPTION OF HOLDERS

SECTION 1301 Applicability of Article.

Repayment of Securities of any series before their Stated Maturity at the option of Holders thereof shall be made in accordance with the terms of such Securities and (except as otherwise specified by the terms of such series established pursuant to Section 301) in accordance with this Article.

SECTION 1302 Repayment of Securities.

Securities of any series subject to repayment in whole or in part at the option of the Holders thereof will, unless otherwise provided in the terms of such Securities, be repaid at

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the Repayment Price thereof, together with interest, if any, thereon accrued to the Repayment Date specified in or pursuant to the terms of such Securities. The Company covenants that on or before the Repayment Date it will deposit with the Trustee or with a Paying Agent (or, if the Company or any Subsidiary or any Affiliate of any of them is acting as Paying Agent, segregate and hold in trust as provided in Section 1003) an amount of money in the Currency in which the Securities of such series are payable (except as otherwise specified pursuant to
Section 301 for the Securities of such series and except, if applicable, as provided in Sections 312(b), 312(d) and 312(e)) sufficient to pay the Repayment Price of, and (unless otherwise specified pursuant to Section 301) accrued interest on, all the Securities or portions thereof, as the case may be, to be repaid on such date.

SECTION 1303 Exercise of Option.

Securities of any series subject to repayment at the option of the Holders thereof will contain an "Option to Elect Repayment" form on the reverse of such Securities. To be repaid at the option of the Holder, any Security so providing for such repayment, with the "Option to Elect Repayment" form on the reverse of such Security duly completed by the Holder (or by the Holder's attorney duly authorized in writing), must be received by the Company at the Place of Payment therefor specified in the terms of such Security (or at such other place or places of which the Company shall from time to time notify the Holders of such Securities) not earlier than 45 days nor later than 30 days prior to the Repayment Date. If less than the entire Repayment Price of such Security is to be repaid in accordance with the terms of such Security, the portion of the Repayment Price of such Security to be repaid, in increments of the minimum denomination for Securities of such series, and the denomination or denominations of the Security or Securities to be issued to the Holder for the portion of such Security surrendered that is not to be repaid, must be specified. Any Security providing for repayment at the option of the Holder thereof may not be repaid in part if, following such repayment, the unpaid principal amount of such Security would be less than the minimum authorized denomination of Securities of the series of which such Security to be repaid is a part. Except as otherwise may be provided by the terms of any Security providing for repayment at the option of the Holder thereof, exercise of the repayment option by the Holder shall be irrevocable unless waived by the Company.

SECTION 1304 When Securities Presented for Repayment Become Due and Payable.

If Securities of any series providing for repayment at the option of the Holders thereof shall have been surrendered as provided in this Article and as provided by or pursuant to the terms of such Securities, such Securities or the portions thereof, as the case may be, to be repaid shall become due and payable and shall be paid by the Company on the Repayment Date therein specified, and on and after such Repayment Date (unless the Company and, if applicable, the Subsidiary Guarantors shall default in the payment of such Securities on such Repayment Date) such Securities shall, if the same were interest-bearing, cease to bear interest and the coupons for such interest appertaining to any Bearer Securities so to be repaid, except to the extent provided below, shall be void. Upon surrender of any such Security for repayment in accordance with such provisions, together with all coupons, if any, appertaining thereto maturing after the Repayment Date, the Repayment Price of such Security so to be repaid shall be paid by

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the Company, together with accrued interest, if any, to the Repayment Date; provided, however, that coupons whose Stated Maturity is on or prior to the Repayment Date shall be payable only at an office or agency located outside the United States (except as otherwise provided in Section 1002) and, unless otherwise specified pursuant to Section 301, only upon presentation and surrender of such coupons; and provided further that installments of interest on Registered Securities, whose Stated Maturity is prior to (or, if specified pursuant to Section 301, on) the Repayment Date shall be payable (but without interest thereon, unless the Company shall default in the payment thereof) to the Holders of such Securities, or one or more Predecessor Securities, registered as such at the close of business on the relevant Record Dates according to their terms and the provisions of Section 307.

If any Bearer Security surrendered for repayment shall not be accompanied by all appurtenant coupons maturing after the Repayment Date, such Security may be paid after deducting from the amount payable therefor as provided in Section 1302 an amount equal to the face amount of all such missing coupons, or the surrender of such missing coupon or coupons may be waived by the Company and, if applicable, the Subsidiary Guarantors and the Trustee if there be furnished to them such security or indemnity as they may require to save each of them and any Paying Agent harmless. If thereafter the Holder of such Security shall surrender to the Trustee or any Paying Agent any such missing coupon in respect of which a deduction shall have been made as provided in the preceding sentence, such Holder shall be entitled to receive the amount so deducted; provided, however, that interest represented by coupons shall be payable only at an office or agency located outside the United States (except as otherwise provided in Section 1002) and, unless otherwise specified as contemplated by
Section 301, only upon presentation and surrender of those coupons.

If any Security surrendered for repayment shall not be so repaid upon surrender thereof, the Repayment Price shall, until paid, bear interest from the Repayment Date at the rate of interest set forth in such Security or, in the case of an Original Issue Discount Security, at the Yield to Maturity of such Security.

SECTION 1305 Securities Repaid in Part.

Upon surrender of any Registered Security which is to be repaid in part only, the Company shall execute and the Trustee shall authenticate and deliver to the Holder of such Security, without service charge and at the expense of the Company, a new Registered Security or Securities of the same series, of any authorized denomination specified by the Holder, in an aggregate principal amount equal to and in exchange for the portion of the principal of such Security so surrendered which is not to be repaid.

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ARTICLE FOURTEEN

DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1401 Applicability of Article; Company's Option to Effect Defeasance or Covenant Defeasance.

If pursuant to Section 301 provision is made for either or both of (a) defeasance of the Securities of or within a series under Section 1402 or (b) covenant defeasance of the Securities of or within a series under
Section 1403, then the provisions of such Section or Sections, as the case may be, together with the other provisions of this Article (with such modifications thereto as may be specified pursuant to Section 301 with respect to any Securities), shall be applicable to such Securities and any coupons appertaining thereto, and the Company may at its option by Board Resolution, at any time, with respect to such Securities and any coupons appertaining thereto, elect to have Section 1402 (if applicable) or Section 1403 (if applicable) be applied to such Outstanding Securities and any coupons appertaining thereto upon compliance with the conditions set forth below in this Article.

SECTION 1402 Defeasance and Discharge.

Upon the Company's exercise of the above option applicable to this Section with respect to any Securities of or within a series, the Company and, if applicable, the Subsidiary Guarantors shall each be deemed to have been discharged from its obligations with respect to such Outstanding Securities and any coupons appertaining thereto on the date the conditions set forth in Section 1404 are satisfied (hereinafter, "defeasance"). For this purpose, such defeasance means that the Company shall be deemed to have paid and discharged the entire indebtedness represented by such Outstanding Securities and any coupons appertaining thereto, which shall thereafter be deemed to be "Outstanding" only for the purposes of Section 1405 and the other Sections of this Indenture referred to in clauses (A) and (B) of this Section, and to have satisfied all its other obligations under such Securities and any coupons appertaining thereto and this Indenture insofar as such Securities and any coupons appertaining thereto are concerned (and the Trustee, at the expense of the Company, shall execute proper instruments acknowledging the same), except for the following which shall survive until otherwise terminated or discharged hereunder: (A) the rights of Holders of such Outstanding Securities and any coupons appertaining thereto to receive, solely from the trust fund described in
Section 1404 and as more fully set forth in such Section, payments in respect of the principal of (and premium, if any) and interest, if any, on such Securities and any coupons appertaining thereto when such payments are due, (B) the obligations of the Company and, to the extent applicable, the Subsidiary Guarantors with respect to such Securities under Sections 305, 306, 1002 and 1003 and with respect to the payment of Additional Amounts, if any, on such Securities as contemplated by Section 1004 with respect to the rights, if any, of the holders of such Securities to require the Company and, to the extent applicable, the Subsidiary Guarantors to repay such Securities as contemplated by Article Thirteen and with respect to the rights, if any, of holders to convert or exchange such Securities into other Securities, (C) the rights, powers, trusts, duties and immunities of the Trustee hereunder and (D) this Article. Subject to compliance with this Article Fourteen, the Company may exercise its option under this Section notwithstanding the prior exercise of its option under Section 1403 with respect to such Securities and any coupons appertaining thereto.

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SECTION 1403 Covenant Defeasance.

Upon the Company's exercise of the above option applicable to this Section with respect to any Securities of or within a series, the Company and, if applicable, the Subsidiary Guarantors shall each be released from its obligations under Section 1005 if specified pursuant to Section 301, its obligations under any other covenant, with respect to such Outstanding Securities and any coupons appertaining thereto on and after the date the conditions set forth in Section 1404 are satisfied (hereinafter, "covenant defeasance"), and such Securities and any coupons appertaining thereto shall thereafter be deemed to be not "Outstanding" for the purposes of any direction, waiver, consent or declaration or Act of Holders (and the consequences of any thereof) in connection with [any restrictive covenants that may be inserted], or such other covenant, but shall continue to be deemed "Outstanding" for all other purposes hereunder. For this purpose, such covenant defeasance means that, with respect to such Outstanding Securities and any coupons appertaining thereto, the Company and the Subsidiary Guarantors may omit to comply with and shall have no liability in respect of any term, condition or limitation set forth in any such
Section or such other covenant, whether directly or indirectly, by reason of any reference elsewhere herein to any such Section or such other covenant or by reason of reference in any such Section or such other covenant to any other provision herein or in any other document and such omission to comply shall not constitute a Default or an Event of Default under Section 501(4) or 501(7) or otherwise except as specified in accordance with Section 301, as the case may be, but, except as specified above, the remainder of this Indenture and such Securities and any coupons appertaining thereto shall be unaffected thereby.

SECTION 1404 Conditions to Defeasance or Covenant Defeasance.

The following shall be the conditions to application of
Section 1402 or Section 1403 to any Outstanding Securities of or within a series and any coupons appertaining thereto:

(a) The Company shall irrevocably have deposited or caused to be deposited with the Trustee (or another trustee satisfying the requirements of Section 607 who shall agree to comply with the provisions of this Article Fourteen applicable to it) as trust funds in trust for the purpose of making the following payments, specifically pledged as security for, and dedicated solely to, the benefit of the Holders of such Securities and any coupons appertaining thereto, (1) an amount (in such Currency in which such Securities and any coupons appertaining thereto are then specified as payable at Stated Maturity), or (2) Government Obligations applicable to such Securities and coupons appertaining thereto (determined on the basis of the Currency in which such Securities and coupons appertaining thereto are then specified as payable at Stated Maturity) which through the scheduled payment of principal and interest in respect thereof in accordance with their terms will provide, not later than one day before the due date of any payment of principal of (and premium, if any) and interest, if any, on such Securities and any coupons appertaining thereto, money in an amount, or (3) a combination thereof in an amount, sufficient, in the opinion of a nationally recognized firm of independent public accountants or nationally recognized independent investment banking firm expressed in a written certification thereof delivered to the Trustee, to pay and discharge, and which shall be applied by the Trustee (or other qualifying trustee) to pay and discharge, (i) the principal of (and premium, if any) and interest, if any, on such Outstanding Securities and

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any coupons appertaining thereto on the Stated Maturity of such principal or installment of principal or interest and (ii) any mandatory sinking fund payments or analogous payments applicable to such Outstanding Securities and any coupons appertaining thereto on the day on which such payments are due and payable in accordance with the terms of this Indenture and of such Securities and any coupons appertaining thereto.

(b) Such defeasance or covenant defeasance shall not result in a breach or violation of, or constitute a default under, this Indenture or any other material agreement or instrument to which the Company is a party or by which it is bound.

(c) No Default or Event of Default with respect to such Securities and any coupons appertaining thereto shall have occurred and be continuing on the date of such deposit or, insofar as Sections 501(5) and 501(6) are concerned, at any time during the period ending on the 91st day after the date of such deposit (it being understood that this condition shall not be deemed satisfied until the expiration of such period).

(d) In the case of an election under Section 1402, the Company shall have delivered to the Trustee an Opinion of Counsel stating that
(i) the Company has received from, or there has been published by, the Internal Revenue Service a ruling, or (ii) since the date of execution of this Indenture, there has been a change in the applicable Federal income tax law, in either case to the effect that, and based thereon such opinion shall confirm that, the Holders of such Outstanding Securities and any coupons appertaining thereto will not recognize income, gain or loss for Federal income tax purposes as a result of such defeasance and will be subject to Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such defeasance had not occurred.

(e) In the case of an election under Section 1403, the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the Holders of such Outstanding Securities and any coupons appertaining thereto will not recognize income, gain or loss for Federal income tax purposes as a result of such covenant defeasance and will be subject to Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such covenant defeasance had not occurred.

(f) The Company shall have delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, each stating that all conditions precedent to the defeasance under Section 1402 or the covenant defeasance under Section 1403 (as the case may be) have been complied with and an Opinion of Counsel to the effect that either (i) as a result of a deposit pursuant to subsection (a) above and the related exercise of the Company's option under Section 1402 or Section 1403 (as the case may be), registration is not required under the Investment Company Act of 1940, as amended, by the Company, with respect to the trust funds representing such deposit or by the trustee for such trust funds or (ii) all necessary registrations under said Act have been effected.

(g) Notwithstanding any other provisions of this Section, such defeasance or covenant defeasance shall be effected in compliance with any additional or substitute

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terms, conditions or limitations which may be imposed on the Company in connection therewith pursuant to Section 301.

SECTION 1405 Deposited Money and Government Obligations to Be Held in Trust; Other Miscellaneous Provisions.

Subject to the provisions of the last paragraph of Section 1003, all money and Government Obligations (or other property as may be provided pursuant to Section 301) (including the proceeds thereof) deposited with the Trustee (or other qualifying trustee, collectively for purposes of this Section 1405, the "Trustee") pursuant to Section 1404 in respect of any Outstanding Securities of any series and any coupons appertaining thereto shall be held in trust and applied by the Trustee, in accordance with the provisions of such Securities and any coupons appertaining thereto and this Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as its own Paying Agent) as the Trustee may determine, to the Holders of such Securities and any coupons appertaining thereto of all sums due and to become due thereon in respect of principal (and premium, if any) and interest, if any, but such money need not be segregated from other funds except to the extent required by law.

Unless otherwise specified with respect to any Security pursuant to Section 301, if, after a deposit referred to in Section 1404(a) has been made, (a) the Holder of a Security in respect of which such deposit was made is entitled to, and does, elect pursuant to Section 312(b) or the terms of such Security to receive payment in a Currency other than that in which the deposit pursuant to Section 1404(a) has been made in respect of such Security, or (b) a Conversion Event occurs as contemplated in Section 312(d) or 312(e) or by the terms of any Security in respect of which the deposit pursuant to Section 1404(a) has been made, the indebtedness represented by such Security and any coupons appertaining thereto shall be deemed to have been, and will be, fully discharged and satisfied through the payment of the principal of (and premium, if any) and interest, if any, on such Security as the same becomes due out of the proceeds yielded by converting (from time to time as specified below in the case of any such election) the amount or other property deposited in respect of such Security into the Currency in which such Security becomes payable as a result of such election or Conversion Event based on the applicable Market Exchange Rate for such Currency in effect on the second Business Day prior to each payment date, except, with respect to a Conversion Event, for such Currency in effect (as nearly as feasible) at the time of the Conversion Event.

The Company shall pay and indemnify the Trustee against any tax, fee or other charge imposed on or assessed against the Government Obligations deposited pursuant to Section 1404 or the principal and interest received in respect thereof other than any such tax, fee or other charge which by law is for the account of the Holders of such Outstanding Securities and any coupons appertaining thereto.

Anything in this Article to the contrary notwithstanding, the Trustee shall deliver or pay to the Company from time to time upon Company Request any money or Government Obligations (or other property and any proceeds therefrom) held by it as provided in Section 1404 which, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, are in excess of the amount

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thereof which would then be required to be deposited to effect a defeasance or covenant defeasance, as applicable, in accordance with this Article.

ARTICLE FIFTEEN

MEETINGS OF HOLDERS OF SECURITIES

SECTION 1501 Purposes for Which Meetings May Be Called.

If Securities of a series are issuable as Bearer Securities, a meeting of Holders of Securities of such series may be called at any time and from time to time pursuant to this Article to make, give or take any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be made, given or taken by Holders of Securities of such series.

SECTION 1502 Call, Notice and Place of Meetings.

The Company may at any time call a meeting of Holders of Securities of any series for any purpose specified in Section 1501, to be held at such time and at such place in the Borough of Manhattan, The City of New York or in London as the Company shall determine. Notice of every meeting of Holders of Securities of any series, setting forth the time and the place of such meeting and in general terms the action proposed to be taken at such meeting, shall be given, in the manner provided in Section 106, not less than 21 nor more than 180 days prior to the date fixed for the meeting.

SECTION 1503 Persons Entitled to Vote at Meetings.

To be entitled to vote at any meeting of Holders of Securities of any series, a Person shall be (1) a Holder of one or more Outstanding Securities of such series, or (2) a Person appointed by an instrument in writing as proxy for a Holder or Holders of one or more Outstanding Securities of such series by such Holder or Holders. The only Persons who shall be entitled to be present or to speak at any meeting of Holders of Securities of any series shall be the Persons entitled to vote at such meeting and their counsel, any representatives of the Trustee and its counsel and any representatives of the Company and its counsel.

SECTION 1504 Quorum; Action.

The Persons entitled to vote a majority in principal amount of the Outstanding Securities of a series shall constitute a quorum for a meeting of Holders of Securities of such series; provided, however, that if any action is to be taken at such meeting with respect to a consent or waiver which this Indenture expressly provides may be given by the Holders of not less than a specified percentage in principal amount of the Outstanding Securities of a series, the Persons entitled to vote such specified percentage in principal amount of the Outstanding Securities of such series shall constitute a quorum. In the absence of a quorum within 30 minutes of the time appointed for any such meeting, the meeting shall, if convened at the request of Holders of Securities of such series, be dissolved. In any other case the meeting may be adjourned for a period of not less than 10 days as determined by the chairman of the meeting

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prior to the adjournment of such meeting. In the absence of a quorum at any such adjourned meeting, such adjourned meeting may be further adjourned for a period of not less than 10 days as determined by the chairman of the meeting prior to the adjournment of such adjourned meeting. Notice of the reconvening of any adjourned meeting shall be given as provided in Section 1502(a), except that such notice need be given only once not less than five days prior to the date on which the meeting is scheduled to be reconvened. Notice of the reconvening of any adjourned meeting shall state expressly the percentage, as provided above, of the principal amount of the Outstanding Securities of such series which shall constitute a quorum.

Except as limited by the proviso to Section 902, any resolution presented to a meeting or adjourned meeting duly reconvened at which a quorum is present as aforesaid may be adopted by the affirmative vote of the Holders of a majority in principal amount of the Outstanding Securities of that series; provided, however, that, except as limited by the proviso to Section 902, any resolution with respect to any request, demand, authorization, direction, notice, consent, waiver or other action which this Indenture expressly provides may be made, given or taken by the Holders of a specified percentage, which is less than a majority, in principal amount of the Outstanding Securities of a series may be adopted at a meeting or an adjourned meeting duly reconvened and at which a quorum is present as aforesaid by the affirmative vote of the Holders of such specified percentage in principal amount of the Outstanding Securities of that series.

Any resolution passed or decision taken at any meeting of Holders of Securities of any series duly held in accordance with this Section shall be binding on all the Holders of Securities of such series and the related coupons, whether or not present or represented at the meeting.

Notwithstanding the foregoing provisions of this Section 1504, if any action is to be taken at a meeting of Holders of Securities of any series with respect to any request, demand, authorization, direction, notice, consent, waiver or other action that this Indenture expressly provides may be made, given or taken by the Holders of a specified percentage in principal amount of all Outstanding Securities affected thereby, or of the Holders of such series and one or more additional series:

(A) there shall be no minimum quorum requirement for such meeting; and

(B) the principal amount of the Outstanding Securities of such series that vote in favor of such request, demand, authorization, direction, notice, consent, waiver or other action shall be taken into account in determining whether such request, demand, authorization, direction, notice, consent, waiver or other action has been made, given or taken under this Indenture.

SECTION 1505 Determination of Voting Rights; Conduct and Adjournment of Meetings.

(a) Notwithstanding any provisions of this Indenture, the Company may make such reasonable regulations as it may deem advisable for any meeting of Holders of Securities of a series in regard to proof of the holding of Securities of such series and of the appointment of

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proxies and in regard to the appointment and duties of inspectors of votes, the submission and examination of proxies, certificates and other evidence of the right to vote, and such other matters concerning the conduct of the meeting as it shall deem appropriate. Except as otherwise permitted or required by any such regulations, the holding of Securities shall be proved in the manner specified in Section 104 and the appointment of any proxy shall be proved in the manner specified in Section 104 or by having the signature of the Person executing the proxy witnessed or guaranteed by any trust company, bank or banker authorized by
Section 104 to certify to the holding of Bearer Securities. Such regulations may provide that written instruments appointing proxies, regular on their face, may be presumed valid and genuine without the proof specified in Section 104 or other proof.

(b) The Company shall, by an instrument in writing appoint a temporary chairman of the meeting, unless the meeting shall have been called by Holders of Securities as provided in Section 1502(b), in which case the Holders of Securities of the series calling the meeting shall in like manner appoint a temporary chairman. A permanent chairman and a permanent secretary of the meeting shall be elected by vote of the Persons entitled to vote a majority in principal amount of the Outstanding Securities of such series represented at the meeting.

(c) At any meeting each Holder of a Security of such series or proxy shall be entitled to one vote for each $1,000 principal amount of the Outstanding Securities of such series held or represented by him; provided, however, that no vote shall be cast or counted at any meeting in respect of any Security challenged as not Outstanding and ruled by the chairman of the meeting to be not Outstanding. The chairman of the meeting shall have no right to vote, except as a Holder of a Security of such series or proxy.

(d) Any meeting of Holders of Securities of any series duly called pursuant to Section 1502 at which a quorum is present may be adjourned from time to time by Persons entitled to vote a majority in principal amount of the Outstanding Securities of such series represented at the meeting, and the meeting may be held as so adjourned without further notice.

SECTION 1506 Counting Votes and Recording Action of Meetings.

The vote upon any resolution submitted to any meeting of Holders of Securities of any series shall be by written ballots on which shall be subscribed the signatures of the Holders of Securities of such series or of their representatives by proxy and the principal amounts and serial numbers of the Outstanding Securities of such series held or represented by them. The permanent chairman of the meeting shall appoint two inspectors of votes who shall count all votes cast at the meeting for or against any resolution and who shall make and file with the secretary of the meeting their verified written reports in duplicate of all votes cast at the meeting. A record, at least in duplicate, of the proceedings of each meeting of Holders of Securities of any Series shall be prepared by the secretary of the meeting and there shall be attached to said record the original reports of the inspectors of votes on any vote by ballot taken thereat and affidavits by one or more persons having knowledge of the fact, setting forth a copy of the notice of the meeting and showing that said notice was given as provided in Section 1502 and, if applicable, Section 1504. Each copy shall be signed and verified by the affidavits of the permanent chairman and secretary of the meeting and one such copy shall be delivered to the Company and another to the Trustee to be preserved by the Trustee, the former to have attached thereto the

85

ballots voted at the meeting. Any record so signed and verified shall be conclusive evidence of the matters therein stated.

ARTICLE SIXTEEN

GUARANTEES

SECTION 1601 Guarantees.

If Securities of or within a series are specified, as contemplated by Section 301, to be guaranteed by the Subsidiary Guarantors, then each of the Subsidiary Guarantors hereby fully and unconditionally guarantees, jointly and severally, to each Holder of any such Security which is authenticated and delivered by the Trustee and to each Holder of any coupon appertaining to any such Security, if any, and to the Trustee on behalf of each such Holder, the due and punctual payment of the principal of (and premium, if any, on) and interest (including, in case of default, interest on principal and, to the extent permitted by applicable law, on overdue interest and including any additional interest required to be paid according to the terms of any such Security or any coupon appertaining thereto), if any, on each such Security, and the due and punctual payment of any sinking fund payment (or analogous obligation), if any, provided for with respect to any such Security, when and as the same shall become due and payable, whether at Stated Maturity, upon redemption, upon acceleration, upon tender for repayment at the option of any Holder or otherwise, according to the terms thereof and of this Indenture, including, without limitation, the payment of any Additional Amounts, if any, provided for with respect to any such Security as described under Section 1005 hereof (the "Guarantor Obligations"). In case of the failure of the Company or any successor thereto punctually to pay any such principal, premium, interest or sinking fund payment, each of the Subsidiary Guarantors hereby agrees to cause any such payment to be made punctually when and as the same shall become due and payable, whether at Stated Maturity, upon redemption, upon declaration of acceleration, upon tender for repayment at the option of any Holder or otherwise, as if such payment were made by the Company.

Each of the Subsidiary Guarantors hereby agrees that its Guarantor Obligations hereunder shall be as if it were principal debtor and not merely surety and shall be absolute and unconditional, irrespective of the identity of the Company, the validity, regularity or enforceability of any such Security or coupon appertaining thereto or this Indenture, the absence of any action to enforce the same, any waiver or consent by the Holder of any such Security or coupon appertaining thereto with respect to any provisions thereof, the recovery of any judgment against the Company or any action to enforce the same, or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a Subsidiary Guarantor. Each of the Subsidiary Guarantors hereby waives diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Company, any right to require a proceeding first against the Company, protest, notice and all demands whatsoever and covenants that its Subsidiary Guarantee will not be discharged except by complete performance of its obligations contained in any such Security or coupon appertaining thereto and in its Subsidiary Guarantee.

86

If the Trustee or the Holder of any Security or any coupon appertaining thereto is required by any court or otherwise to return to the Company or any Subsidiary Guarantor, or any custodian, receiver, liquidator, assignee, trustee, sequestrator or other similar official acting in relation to the Company or such Subsidiary Guarantor, any amount paid to the Trustee or such Holder in respect of a Security or any coupons appertaining thereto, the related Subsidiary Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect. Each of the Subsidiary Guarantors further agrees, to the fullest extent that it may lawfully do so, that, as between such Subsidiary Guarantor, on the one hand, and the Holders and the Trustee, on the other hand, the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five hereof for the purposes of this Subsidiary Guarantee, notwithstanding any stay, injunction or other prohibition extant under any applicable bankruptcy law preventing such acceleration in respect of the obligations guaranteed hereby.

Each of the Subsidiary Guarantors shall be subrogated to all rights of the Holders of the Securities of a series (and of any coupons appertaining thereto) against the Company in respect of any amounts paid by such Subsidiary Guarantor on account of such Securities or any coupons appertaining thereto or this Indenture; provided, however, that such Subsidiary Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (and premium, if any, on) and interest, if any, on all Securities of such series shall have been indefeasibly paid in full.

SECTION 1602 Execution and Delivery of Guarantees.

To evidence the Subsidiary Guarantees with respect to Securities of or within any series that are specified, as contemplated by
Section 301, to be guaranteed by the Subsidiary Guarantors, each of the Subsidiary Guarantors hereby agrees to execute its Subsidiary Guarantee, in a form established pursuant to Section 201, to be endorsed on each Security of such series authenticated and delivered by the Trustee. Each such Subsidiary Guarantee shall be executed on behalf of such Subsidiary Guarantor by its Chairman of the Board, the Chief Executive Officer, the Chief Operating Officer, the Financial Officer, or its President, or one of its Executive Vice Presidents or Vice Presidents, or by its Treasurer or one of its Assistant Treasurers and attested by its Secretary or one of its Assistant Secretaries. The signature of any of these officers on the Subsidiary Guarantees may be manual or facsimile.

Any Subsidiary Guarantee bearing the manual or facsimile signatures of the individuals who were the proper officers of any Subsidiary Guarantor shall bind such Subsidiary Guarantor, notwithstanding that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of the Securities upon which such Subsidiary Guarantee are endorsed or did not hold such offices at the date of such Securities.

The delivery of any Securities by the Trustee, after the authentication thereof hereunder, shall constitute due delivery of the Subsidiary Guarantees endorsed thereon on behalf of the Subsidiary Guarantors. Each of the Subsidiary Guarantors hereby agrees that its Subsidiary Guarantee set forth in this Article Thirteen shall remain in full force and effect notwithstanding any failure to endorse on each Security a notation of such Subsidiary Guarantee.

87

SECTION 1603 Limitation of Guarantor's Liability.

Each of the Subsidiary Guarantors, and by its acceptance of a Security each Holder, hereby confirms that it is the intention of all such parties that in no event shall any Guarantor Obligations under the Subsidiary Guarantees constitute or result in a fraudulent transfer or conveyance for purposes of, or result in a violation of, any United States federal, or applicable United States state, fraudulent transfer or conveyance or similar law. To effectuate the foregoing intention, in the event that the Guarantor Obligations of any Subsidiary Guarantor in respect of the Securities of any series would, but for this sentence, constitute or result in such a fraudulent transfer or conveyance or violation, then the liability of such Subsidiary Guarantor under its Subsidiary Guarantee in respect of the Securities of such series shall be reduced to the extent necessary to eliminate such fraudulent transfer or conveyance or violation under the applicable fraudulent transfer or conveyance or similar law.

* * * * *

88

This Indenture may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all such counterparts shall together constitute but one and the same Indenture.

IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, and their respective corporate seals to be hereunto affixed and attested, all as of the day and year first above written.

QUEST DIAGNOSTICS INCORPORATED

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS CLINICAL
LABORATORIES, INC.

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

89

QUEST DIAGNOSTICS INCORPORATED (CA)

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS INCORPORATED (MD)

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS LLC

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

90

QUEST DIAGNOSTICS INCORPORATED (MI)

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS INCORPORATED (CT)

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS INCORPORATED (MA)

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

91

QUEST DIAGNOSTICS OF PENNSYLVANIA
INC.

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS INCORPORATED (OH)

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

METWEST INC.

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

92

NICHOLS INSTITUTE DIAGNOSTICS

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

DPD HOLDINGS, INC.

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

DIAGNOSTICS REFERENCE SERVICES INC.

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

93

LABORATORY HOLDINGS INCORPORATED

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS INVESTMENTS
INCORPORATED

                                           By  /s/  Stephen Calamari
                                             -----------------------------------
                                             Name:  Stephen Calamari
                                             Title: Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

QUEST DIAGNOSTICS FINANCE
INCORPORATED

                                           By  /s/  Stephen Calamari
                                             -----------------------------------
                                             Name:  Stephen Calamari
                                             Title: Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

94

PATHOLOGY BUILDING PARTNERSHIP

By Quest Diagnostics Incorporated
(MD), General Partner.

                                           By  /s/  Joseph P. Manory
                                             -----------------------------------
                                             Name:  Joseph P. Manory
                                             Title: Vice President and Treasurer

Attest:

/s/ Leo C. Farrenkopf, Jr.
------------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

THE BANK OF NEW YORK
as Trustee

                                           By  /s/  Marie E. Trimboli
                                             -----------------------------------
                                             Name:  Marie E. Trimboli
                                             Title: Assistant Vice President



Attest:

/s/ William J. Cassels
------------------------------------
Name:    William J. Cassels
Title:

95

EXHIBIT A

FORMS OF CERTIFICATES


EXHIBIT A-1

FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED
TO RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST
PAYABLE PRIOR TO THE EXCHANGE DATE

CERTIFICATE

[Insert title or sufficient description of Securities to be delivered]

This is to certify that, as of the date hereof, and except as set forth below, the above-captioned Securities held by you for our account (i) are owned by person(s) that are not citizens or residents of the United States, domestic partnerships, domestic corporations or any estate or trust the income of which is subject to United States federal income taxation regardless of its source ("United States person(s)"), (ii) are owned by United States person(s) that are (a) foreign branches of United States financial institutions (financial institutions, as defined in United States Treasury Regulations Section 1.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing for their own account or for resale, or (b) United States person(s) who acquired the Securities through foreign branches of United States financial institutions and who hold the Securities through such United States financial institutions on the date hereof (and in either case (a) or (b), each such United States financial institution hereby agrees, on its own behalf or through its agent, that you may advise John Deere Capital Corporation or its agent that such financial institution will comply with the requirements of Section 165(j)(3)(A), (B) or (C) of the United States Internal Revenue Code of 1986, as amended, and the regulations thereunder), or (iii) are owned by United States or foreign financial institution(s) for purposes of resale during the restricted period (as defined in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)), and, in addition, if the owner is a United States or foreign financial institution described in clause (iii) above (whether or not also described in clause (i) or (ii)), this is to further certify that such financial institution has not acquired the Securities for purposes of resale directly or indirectly to a United States person or to a person within the United States or its possessions.

As used herein, "United States" means the United States of America (including the States and the District of Columbia); and its "possessions" include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island and the Northern Mariana Islands.

We undertake to advise you promptly by tested telex on or prior to the date on which you intend to submit your certification relating to the above-captioned Securities held by you for our account in accordance with your Operating Procedures if any applicable statement herein is not correct on such date, and in the absence of any such notification it may be assumed that this certification applies as of such date.

This certificate excepts and does not relate to [U.S.$] ______________ of such interest in the above-captioned Securities in respect of which we are not able to certify and as to which we understand an exchange for an interest in a Permanent Global Security or an exchange for and delivery of definitive Securities (or, if relevant, collection of any interest) cannot be made until we do so certify.


We understand that this certificate may be required in connection with certain tax legislation in the United States. If administrative or legal proceedings are commenced or threatened in connection with which this certificate is or would be relevant, we irrevocably authorize you to produce this certificate or a copy thereof to any interested party in such proceedings.

Dated: ___________

[To be dated no earlier than the 15th day prior to (i) the Exchange Date or (ii) the relevant Interest Payment Date occurring prior to the Exchange Date, as applicable]
[Name of Person Making Certification]


(Authorized Signatory)

Name:
Title:

A-1-2


EXHIBIT A-2

FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR AND
CLEARSTREAM BANKING SOCIETE ANONYME IN CONNECTION WITH THE EXCHANGE OF
A PORTION OF A TEMPORARY GLOBAL SECURITY
OR TO OBTAIN INTEREST PAYABLE PRIOR
TO THE EXCHANGE DATE

CERTIFICATE

[Insert title or sufficient description of Securities to be delivered]

This is to certify that, based solely on written certifications that we have received in writing, by tested telex or by electronic transmission from each of the persons appearing in our records as persons entitled to a portion of the principal amount set forth below (our "Member Organizations") substantially in the form attached hereto, as of the date hereof, [U.S.$] __________________ principal amount of the above-captioned Securities (i) is owned by person(s) that are not citizens or residents of the United States, domestic partnerships, domestic corporations or any estate or trust the income of which is subject to United States Federal income taxation regardless of its source ("United States person(s)"), (ii) is owned by United States person(s) that are (a) foreign branches of United States financial institutions (financial institutions, as defined in U.S. Treasury Regulations
Section 1.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing for their own account or for resale, or (b) United States person(s) who acquired the Securities through foreign branches of United States financial institutions and who hold the Securities through such United States financial institutions on the date hereof (and in either case (a) or (b), each such financial institution has agreed, on its own behalf or through its agent, that we may advise John Deere Capital Corporation or its agent that such financial institution will comply with the requirements of Section 165(j)(3)(A), (B) or
(C) of the Internal Revenue Code of 1986, as amended, and the regulations thereunder), or (iii) is owned by United States or foreign financial institution(s) for purposes of resale during the restricted period (as defined in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)), and, to the further effect, that financial institutions described in clause (iii) above (whether or not also described in clause (i) or (ii)) have certified that they have not acquired the Securities for purposes of resale directly or indirectly to a United States person or to a person within the United States or its possessions.

As used herein, "United States" means the United States of America (including the States and the District of Columbia); and its "possessions" include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island and the Northern Mariana Islands.

We further certify that (i) we are not making available herewith for exchange (or, if relevant, collection of any interest) any portion of the temporary global Security representing the above-captioned Securities excepted in the above-referenced certificates of Member Organizations and (ii) as of the date hereof we have not received any notification from any of our Member Organizations to the effect that the statements made by such Member Organizations


with respect to any portion of the part submitted herewith for exchange (or, if relevant, collection of any interest) are no longer true and cannot be relied upon as of the date hereof.

We understand that this certification is required in connection with certain tax legislation in the United States. If administrative or legal proceedings are commenced or threatened in connection with which this certificate is or would be relevant, we irrevocably authorize you to produce this certificate or a copy thereof to any interested party in such proceedings.

Dated: ____________

[To be dated no earlier than
the Exchange Date or the relevant
Interest Payment Date occurring
prior to the Exchange Date, as
applicable]

[Morgan Guaranty Trust Company of New York, Brussels Office,] as Operator of the Euroclear System
[Clearstream Banking societe anonyme]

By

A-2-2


Exhibit 4.4


QUEST DIAGNOSTICS INCORPORATED,

as Issuer

THE SUBSIDIARY GUARANTORS NAMED HEREIN,

as Subsidiary Guarantors

and

THE BANK OF NEW YORK,

as Trustee

First Supplemental Indenture

Dated as of June 27, 2001



                                TABLE OF CONTENTS

                                                                                                               Page
ARTICLE I.  DEFINITIONS...........................................................................................2

         SECTION 1.1.  Certain Terms Defined in the Indenture.....................................................2

         SECTION 1.2.  Definitions................................................................................2

ARTICLE II.  FORM AND TERMS OF THE NOTES..........................................................................5

         SECTION 2.1.  Form and Dating............................................................................5

         SECTION 2.2. Terms of the Notes..........................................................................6

         SECTION 2.3.  Application of the Article of the Indenture Regarding Guarantees...........................8

         SECTION 2.4.  Additional Guarantees......................................................................8

         SECTION 2.5.  Release of Guarantees......................................................................8

         SECTION 2.6.  Application of the Article of the Indenture Regarding Redemption of Securities.............9

         SECTION 2.7.  Calculation of the Redemption Price........................................................9

         SECTION 2.8.  Application of the Article of the Indenture Relating to a Sinking Fund....................11

         SECTION 2.9.  Limitation on Liens.......................................................................11

         SECTION 2.10.  Limitation on Sale and Leaseback Transactions............................................13

         SECTION 2.11.  Exempted Liens and Sale and Leaseback Transactions.......................................13

         SECTION 2.12.  Limitation on Subsidiary Indebtedness and Preferred Stock................................14

         SECTION 2.13.  Consolidation, Merger, Conveyance or Transfer............................................15

         SECTION 2.14.  Additional Events of Default.............................................................15

         SECTION 2.15.  Application of the Article of the Indenture Regarding Defeasance and Covenant
                  Defeasance.....................................................................................16

         SECTION 2.16.  Application of the Article of the Indenture Regarding Repayment at the Option of
                  Holders........................................................................................16

         SECTION 2.17.  Acceleration of Maturity; Rescission and Annulment.......................................16

         SECTION 2.18.  Certain Rights of Trustee................................................................17

1

         SECTION 2.19.  Waiver of Certain Covenants..............................................................17

ARTICLE III.  MISCELLANEOUS......................................................................................17

         SECTION 3.1.  Governing Law.............................................................................17

         SECTION 3.2.  Separability..............................................................................17

         SECTION 3.3.  Counterparts..............................................................................18

         SECTION 3.4.  Ratification..............................................................................18

         SECTION 3.5.  Effectiveness.............................................................................18


EXHIBIT A--Form of 6.75% Senior Note due 2006...................................................................A-1

EXHIBIT B--Form of 7.5% Senior Note due 2011....................................................................B-1

EXHIBIT C--Form of Additional Subsidiary Guarantee..............................................................C-1

2

FIRST SUPPLEMENTAL INDENTURE

SUPPLEMENTAL INDENTURE (this "First Supplemental Indenture"), dated as of June 27, 2001 among QUEST DIAGNOSTICS INCORPORATED, a Delaware corporation (the "Company"), THE BANK OF NEW YORK, a New York banking corporation, as Trustee (the "Trustee"), and the Initial Subsidiary Guarantors (as defined below).

RECITALS OF THE COMPANY

WHEREAS, the Company, the Trustee and the Initial Subsidiary Guarantors executed and delivered an Indenture, dated as of June 27, 2001 (the "Base Indenture," and as supplemented by this First Supplemental Indenture, the "Indenture"), to provide for the issuance by the Company from time to time of Securities to be issued in one or mores series as provided in the Indenture;

WHEREAS, the issuance and sale of $275,000,000 aggregate principal amount of a new series of the Company's 6.75% Senior Notes due July 12, 2006 guaranteed by the Initial Subsidiary Guarantors (the "Notes due 2006") and $275,000,000 aggregate principal amount of a new series of the Company's 7.5% Senior Notes due July 12, 2011 guaranteed by the Initial Subsidiary Guarantors (the "Notes due 2011," and together with the Notes due 2006, the "Notes") has been authorized by resolutions adopted by the Board of Directors of the Company and the Initial Subsidiary Guarantors on June 19, 2001;

WHEREAS, the Company desires to issue and sell $550,000,000 aggregate principal amount of the Notes on the date hereof;

WHEREAS, Sections 901(2), 901(3), 901(7), and 901(9) of the Indenture provide that without the consent of Holders of the Securities of any series issued under the Indenture, the Company and the Subsidiary Guarantors, when authorized by a Board Resolution, and the Trustee may enter into one or more indentures supplemental to the Base Indenture to, among other things, (a) add to the covenants of the Company or the Subsidiary Guarantors for the benefit of the Holders of all or any series of Securities, (b) to add additional Events of Default for the benefit of the Holders of all or any series of Securities,
(c) to establish the form and terms of any series of Securities, and (d) to cure any ambiguity, to correct or supplement any provision herein which may be inconsistent with nay other provision herein, or to make any other provisions with respect to matters or questions arising under the Base Indenture; and

WHEREAS, the Company and the Initial Subsidiary Guarantors desire to (a) add covenants of the Company and the Subsidiary Guarantors and additional Events of Default for the benefit of the Holders of all series of Securities, including the Notes (except as may be provided in a future supplemental indenture to the Indenture (a "Future Supplemental Indenture"), (b) establish the form and terms of the Notes and (c) provide whether certain Articles of the Indenture will apply to all series of Securities, including the Notes (except as may be provided in a Future Supplement Indenture).

WHEREAS, all things necessary to make this First Supplemental Indenture a valid supplement to the Indenture according to its terms and the terms of the Indenture have been done;

NOW, THEREFORE, for and in consideration of the premises stated herein and the purchase of the Notes by the Holders thereof, the parties hereto herby enter into this First Supplemental Indenture, for the equal and proportionate benefit of all Holders of the Notes, as follows:

1

ARTICLE I.

DEFINITIONS

SECTION 1.1. Certain Terms Defined in the Indenture.

All capitalized terms used but not defined herein shall have the meanings ascribed to such terms in the Indenture, as amended hereby.

SECTION 1.2. Definitions.

(a) Except as may be provided in a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, Section 101 of the Indenture shall be amended by adding the following new definitions:

"Acquired Indebtedness" means Indebtedness of a Person (1) existing at the time such Person becomes a Restricted Subsidiary or (2) assumed in connection with the acquisition of assets by such Person, in each case, other than Indebtedness incurred in connection with, or in contemplation of, such Person becoming a Restricted Subsidiary or acquiring such assets, as the case may be.

"Attributable Debt" means, with respect to a Sale and Leaseback Transaction, an amount equal to the lesser of: (1) the fair market value of the property (as determined in good faith by the Company's Board of Directors); and
(2) the present value of the total net rental payments to be made under the lease during its remaining term, discounted at the rate of interest set forth or implicit in the terms of the lease, compounded semi-annually. The term "net rental payments" under any lease for any period shall mean the sum of the rental and other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstructions, insurance, taxes, assessments, water rates, operating and labor costs or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent upon the amount sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges.

"Capitalized Lease" means any obligation of a Person to pay rent or other amounts incurred with respect to real property or equipment acquired or leased by such Person and used in its business that is required to be recorded as a capital lease in accordance with accounting principles generally accepted in the United States.

"Consolidated Total Assets" means, with respect to any Person as of any date, the amount of total assets as shown on the consolidated balance sheet of such Person for the most recent fiscal quarter for which financial statements have been filed with the Commission, prepared in accordance with accounting principles generally accepted in the United States.

"Existing Receivables Credit Facility" means the receivables-backed financing transaction pursuant to (1) the Receivables Sales Agreement, dated as of July 21, 2000 between the Company and each of its direct and indirect wholly owned Subsidiaries that is a seller thereunder, and Quest Diagnostics Receivables Inc., as the buyer, (2) the Credit and Security Agreement, dated as of July 21, 2000 among Quest Diagnostics Receivables Inc., as borrower, the Company, as initial servicer, each of the lenders from time to time party thereto, and Wachovia Bank, N.A., as administrative agent, and (3) the various related ancillary documents.

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"Indebtedness" of any Person means, without duplication (1) any obligation of such Person for money borrowed, (2) any obligation of such Person evidenced by bonds, debentures, notes or other similar instruments, (3) any reimbursement obligation of such Person in respect of letters of credit or other similar instruments which support financial obligations which would otherwise become Indebtedness, and (4) any obligation of such Person under Capitalized Leases; provided, however, that "Indebtedness" of such Person shall not include any obligation of such Person to any Subsidiary of such Person or to any Person with respect to which such Person is a Subsidiary.

"Initial Subsidiary Guarantors" means each of Quest Diagnostics Holdings Incorporated, Quest Diagnostics Clinical Laboratories, Inc., Quest Diagnostics Incorporated (CA), Quest Diagnostics Incorporated (MD), Quest Diagnostics LLC, Quest Diagnostics Incorporated (MI), Quest Diagnostics Incorporated (CT), Quest Diagnostics Incorporated (MA), Quest Diagnostics of Pennsylvania Inc., Quest Diagnostics Incorporated (OH), Metwest Inc., Nichols Institute Diagnostics, DPD Holdings, Inc., Diagnostics Reference Services Inc., Laboratory Holdings Incorporated, Pathology Building Partnership, Quest Diagnostics Investments Incorporated and Quest Diagnostics Finance Incorporated.

"Lien" means any pledge, mortgage, lien, encumbrance or other security interest.

"Permitted Acquired Indebtedness" means any Acquired Indebtedness that remains outstanding following the expiration of a good faith offer by the Company or the Subsidiary of the Company obligated under such Acquired Indebtedness to acquire such Acquired Indebtedness, including, without limitation, an offer to exchange such Acquired Indebtedness for debt securities of the Company, on terms, which in the opinion of an independent investment banking firm of national reputation and standing, are consistent with market practices in existence at the time for offers of a similar nature; provided that the initial expiration date of any such offer shall not be later than the expiration of the 270-day period referred to in the first paragraph of Section 1011; provided further, that the amount of Acquired Indebtedness that shall constitute "Permitted Acquired Indebtedness" shall only be equal to the amount of Acquired Indebtedness that the Company or such Subsidiary has made an offer to acquire in accordance with the foregoing.

"Preferred Stock" means, with respect to any Person, any and all shares of preferred stock (however designated) issued by such Person, that is entitled to preference or priority over one or more series or classes of capital stock issued by such Person upon any distribution of such Person's property and assets, whether by dividend or on liquidation, whether now outstanding, or issued after the date that the Notes are issued.

"Principal Property" means any real property and any related buildings, fixtures or other improvements located in the United States owned by the Company or its Subsidiaries (1) on or in which one of its 30 largest domestic clinical laboratories conducts operations, as determined by net revenues for the four most recent fiscal quarters for which financial statements have been filed with the Commission, or (2) the net book value of which at the time of the determination exceeds 1% of the Consolidated Total Assets of the Company.

"Receivables Credit Facility" means any receivables-backed financing transaction including the Existing Receivables Credit Facility, in each case as such transaction may be amended or otherwise modified from time to time or refinanced or replaced with respect to all or any portion of the indebtedness under such transaction.

"Restricted Subsidiary" means any Subsidiary of the Company that owns a Principal Property.

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"Sale and Leaseback Transaction" means any arrangement with any person providing for the leasing by the Company or any Restricted Subsidiary of any Principal Property that has been or is to be sold or transferred by the Company or any Restricted Subsidiary to such person, as the case may be.

(b) Except as may be provided in a Future Supplemental Indenture for the benefit of the Holders of all Securities, including the Notes,
Section 101 of the Indenture shall be amended by deleting the definitions of "Person," "Subsidiary," "Subsidiary Guarantees" and "Subsidiary Guarantor" and replacing such definitions with the following definitions:

"Person" means any individual, corporation, limited liability company, partnership, joint venture, association, joint stock company, trust, unincorporated organization, or government or any agency or political subdivision thereof or other similar entity.

"Subsidiary" of any Person means (1) a corporation, a majority of the outstanding voting stock of which is, at the time, directly or indirectly, owned by such Person by one or more Subsidiaries of such Person, or by such Person and one or more Subsidiaries thereof or (2) any other Person (other than a corporation), including, without limitation, a partnership or joint venture, in which such Person, one or more Subsidiaries thereof or such Person and one or more Subsidiaries thereof, directly or indirectly, at the date of determination thereof, has at least majority ownership interest entitled to vote in the election of directors, managers or Trustees thereof (or other Person performing similar functions).

"Subsidiary Guarantees" means, with respect to the Securities of any series, the guarantees with respect to the Securities of such series by a Subsidiary Guarantor pursuant to Article Sixteen hereof or a supplemental indenture thereto.

"Subsidiary Guarantors" means, at any time, (1) each Initial Subsidiary Guarantor and (2) each existing and future domestic Subsidiary of the Company which is required to guarantee the obligations of the Company under any series of Securities; provided that, in each case, such Initial Subsidiary Guarantor or such other domestic Subsidiary continues to guarantee any series of Securities at such time.

(c) Definitions of the following terms in this First Supplemental Indenture may be found in the Sections indicated as follows:

Term                                        Defined in Section
----                                        ------------------

"Additional Notes"                              Section 2.2

"Base Indenture"                                Recitals

"Comparable Treasury Issue"                     Section 2.7

"Comparable Treasury Price"                     Section 2.7

"Depositary"                                    Section 2.1

"First Supplemental Indenture"                  Recitals

"Global Notes"                                  Section 2.1

"Indenture"                                     Recitals

"Independent Investment Banker"                 Section 2.7

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"Notes"                                         Recitals

"Notes due 2006"                                Recitals

"Notes due 2011"                                Recitals

"Reference Treasury Dealer Quotations"          Section 2.7

"Reference Treasury Dealer"                     Section 2.7

"Remaining Scheduled Payments"                  Section 2.7

"Treasury Rate"                                 Section 2.7

ARTICLE II.

FORM AND TERMS OF THE NOTES

SECTION 2.1. Form and Dating.

The Notes due 2006, the applicable Subsidiary Guarantees and the Trustee's certificate of authentication shall be substantially in the form of Exhibit A attached hereto. The Notes due 2011, the applicable Subsidiary Guarantees and the Trustee's certificate of authentication shall be substantially in the form of Exhibit B attached hereto. The Notes shall be executed on behalf of the Company by its Chairman of the Board, its President or one of its Vice Presidents, under its corporate seal reproduced thereon. The Notes may have notations, legends or endorsements required by law, stock exchange rules or usage. Each Note shall be dated the date of its authentication. The Notes and any beneficial interest in the Notes shall be in denominations of $1,000 and integral multiples thereof.

The terms and notations contained in the Notes shall constitute, and are hereby expressly made, a part of this Indenture and the Company, the Subsidiary Guarantors and the Trustee, by their execution and delivery of this Indenture, expressly agree to such terms and provisions and to be bound thereby.

(a) Global Notes. The Notes of each series designated herein shall be issued initially in the form of one or more fully registered global notes (the "Global Notes"), which shall be deposited on behalf of the purchasers of the Notes represented thereby with The Depository Trust Company, New York, New York (the "Depository") and registered in the name of Cede & Co., the Depository's nominee, duly executed by the Company, authenticated by the Trustee and with guarantees endorsed thereon as hereinafter provided. The aggregate principal amount of outstanding Notes may from time to time be increased or decreased by adjustments made on the records of the Trustee and the Depository or its nominee as hereinafter provided.

The Global Notes may not be transferred except by the Depository, in whole and not in part, to another nominee of the Depository or to a successor of the Depository or its nominee. If at any time the Depository for the Notes notifies the Company that the Depository is unwilling or unable to continue as Depository for the Global Notes and a successor Depository for the Global Notes is not appointed by the Company within 90 days after delivery of such notice, then the Company shall execute, and the Trustee shall, upon receipt of a Company

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Order for authentication, authenticate and deliver, Definitive Notes in an aggregate principal amount equal to the principal amount of the Global Notes in exchange for such Global Note.

(b) Book-Entry Provisions. This Section 2.1(b) shall apply only to the Global Notes deposited with or on behalf of the Depository.

The Company shall execute and the Trustee shall, in accordance with this Section 2.1(b), authenticate and deliver the Global Notes that shall be registered in the name of the Depository or the nominee of the Depository and shall be delivered by the Trustee to the Depository or pursuant to the Depository's instructions.

Depository Participants shall have no rights either under this Indenture or with respect to any Global Notes held on their behalf by the Depository or under such Global Notes. The Depository shall be treated by the Company, the Subsidiary Guarantors, the Trustee and any agent of the Company, the Subsidiary Guarantors or the Trustee as the absolute owner of such Global Note for all purposes under this Indenture. Notwithstanding the foregoing, nothing herein shall prevent the Company or the Trustee from giving effect to any written certification, proxy or other authorization furnished by the Depository or impair, as between the Depository and the Depository Participants, the operation of customary practices of such Depository governing the exercise of the rights of an owner of a beneficial interest in the Global Notes.

(c) Definitive Notes. Notes issued in certificated form shall be substantially in the form of Exhibit A or Exhibit B, as applicable, attached hereto, but without including the text referred to therein as applying only to Global Notes. Except as provided above in subsection
(a), owners of beneficial interests in the Global Notes will not be entitled to receive physical delivery of certificated Notes.

(d) Transfer and Exchange of the Notes. The transfer and exchange of beneficial interests in the Global Notes shall be effected through the Depository, in accordance with this Indenture and the procedures of the Depository therefor. Beneficial interests in the Global Notes may be transferred to Persons who take delivery thereof in the form of a beneficial interest in the Global Notes.

SECTION 2.2. Terms of the Notes.

The following terms relating to the Notes are hereby established:

(a) the Notes due 2006 shall constitute a series of Securities having the title "6.75% Senior Notes due 2006" and the Notes due 2011 shall constitute a separate series of Securities having the title "7.5% Senior Notes due 2011."

(b) The aggregate principal amount of the Notes due 2006 that may be initially authenticated and delivered under the Indenture (except for Notes due 2006 authenticated and delivered upon registration of, transfer of, or in exchange for, or in lieu of, other Notes due 2006 pursuant to Sections 304, 305, 306, 906 or 1107 of the Indenture) shall be $275,000,000. The aggregate principal amount of the Notes due 2011 that may be initially authenticated and delivered under the Indenture (except for Notes due 2011 authenticated and delivered upon registration of, transfer of, or in exchange for, or in lieu of, other Notes due 2011 pursuant to Sections 304, 305, 306, 906 or 1107 of the Indenture) shall be $275,000,000. The Company may from time to time, without the consent of the Holders of Notes of either series, issue additional Notes (in any such case "Additional Notes") of either series having the

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same ranking and the same interest rate, maturity and other terms as the Notes of that series. Any additional Notes of a series and the existing Notes of that series will constitute a single series under the Indenture and all references to the relevant Notes shall include the Additional Notes unless the context otherwise requires.

(c) The entire outstanding principal of the Notes due 2006 shall be payable on July 12, 2006 and the entire outstanding principal of the Notes due 2011 shall be payable on July 12, 2011.

(d) The rate at which the Notes due 2006 shall bear interest shall be 6.75 % per annum and the rate at which the Notes due 2011 shall bear interest shall be 7.5 % per annum; the date from which interest shall accrue on the Notes shall be June 27, 2001, or the most recent Interest Payment Date to which interest has been paid or provided for; the Interest Payment Dates for the Notes shall be January 12 and July 12 of each year, beginning January 12, 2002; the interest so payable, and punctually paid or duly provided for, on any Interest Payment Date, will be paid, in immediately available funds, to the Persons in whose names the Notes (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the January 1 or July 1, as the case may be, next preceding such Interest Payment Date. Any such interest not punctually paid or duly provided for shall forthwith cease to be payable to the respective Holders on such Regular Record Date, and such Defaulted Interest, may be paid to the Persons in whose names the Notes (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Notes not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. Payment of principal and interest on this Note will be made at the Corporate Trust Office of the Trustee or such other office or agency of the Company as may be designated for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that each installment of interest and principal on this Notes may at the Company's option be paid in immediately available funds by transfer to an account maintained by the payee located in the United States.

(e) Each of the Notes due 2006 and the Notes due 2011 shall be issuable in whole in the registered form of one or more Global Notes (without coupons), and the Depository for such Global Notes shall be the Depository Trust Company, New York, New York.

(f) The Redemption Amount of Basis Points applicable to the Notes used to calculate the Redemption Price pursuant to Section 1108 of the Indenture shall be 30 basis points for the 6.75% Senior Notes due 2006, and 35 basis points for the 7.5 % Senior Notes due 2011.

(g) Each of the Notes due 2006 and the Notes due 2011 shall be guaranteed by the Initial Subsidiary Guarantors in accordance with Article Sixteen of the Indenture, as amended hereby.

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SECTION 2.3. Application of the Article of the Indenture Regarding Guarantees.

Except as may be provided in a Future Supplemental Indenture, the provisions of Article Sixteen of the Indenture, as amended hereby, shall apply to all Securities, including the Notes.

SECTION 2.4. Additional Guarantees.

Except as may be provided in a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, a new
Section 1604 shall be added to the Indenture as follows:

SECTION 1604 Additional Guarantees.

If any future domestic Subsidiary of the Company or any Subsidiary Guarantor which has been released and discharged from its obligations under its Subsidiary Guarantee of the Notes pursuant to Section 1605:

(a) guarantees any Indebtedness of the Company when the amount of such Indebtedness, together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary Guarantors, exceeds $50 million in the aggregate at any time; or

(b) incurs Indebtedness, unless such Indebtedness is permitted under Section 1011,

then the Company will cause such Subsidiary to execute and deliver to the Trustee: (1) a supplemental indenture pursuant to which it will become a Subsidiary Guarantor under the applicable Supplemental Indenture and (2) an additional Subsidiary Guarantee for each of the Notes substantially in the form contained in Exhibit C to the First Supplemental Indenture.

SECTION 2.5. Release of Guarantees.

Except as may be provided in a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, a new
Section 1605 shall be added to the Indenture as follows:

SECTION 1605 Release of Guarantees.

The Subsidiary Guarantees of the Subsidiary Guarantors with respect to the Securities of any series for which the Subsidiary Guarantors have provided such Subsidiary Guarantees will remain in effect with respect to each Subsidiary Guarantor until the entire amount of principal of, premium, and interest on the Securities of that series shall have been paid in full or otherwise discharged in accordance with the provisions of the Indenture; provided, however, that if

(a) a Subsidiary Guarantor does not guarantee any Indebtedness of the Company the amount of which, excluding any Outstanding Securities of the series to which any Subsidiary Guarantees of such Subsidiary Guarantor apply, when added together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary

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Guarantors, would exceed $50 million in the aggregate at the time of determination, and all outstanding Indebtedness of such Subsidiary Guarantor would have been permitted to be incurred pursuant to Section 1011 measured at the time of the release and discharge as described in this Section 1605,

(b) the Securities of that series are defeased and discharged pursuant to Article Fourteen hereof, or

(c) all or substantially all of the assets of such Subsidiary Guarantor or all of the capital stock of such Subsidiary Guarantor is sold (including by issuance, merger, consolidation or otherwise) by the Company or any of its Subsidiaries,

then in each case of (a), (b) or (c) above, such Subsidiary Guarantor or the corporation acquiring such assets (in the event of a sale or other disposition of all or substantially all of the assets or capital stock of such Subsidiary Guarantor) shall be released and discharged from its obligations under its Subsidiary Guarantees of any applicable series of Securities.

SECTION 2.6. Application of the Article of the Indenture Regarding Redemption of Securities.

Except as may be provided in a Future Supplemental Indenture, the provisions of Article Eleven of the Indenture, as amended hereby, shall apply to all Securities, including the Notes.

SECTION 2.7. Calculation of the Redemption Price.

For the sole benefit of the Holders of the Notes, a new
Section 1108 shall be added to the Indenture as follows:

SECTION 1108 Calculation of the Redemption Price.

At any time and from time to time, the Securities of any series will be redeemable at a Redemption Price equal to the greater of:

(a) 100% of principal amount of the Securities to be redeemed, and

(b) the sum of the present values of the Remaining Scheduled Payments (as defined below) discounted, on a semiannual basis, assuming a 360-day year consisting of twelve 30-day months, at the Treasury Rate (as defined below) plus the Redemption Amount of Basis Points applicable with respect to the series of Securities to be redeemed.

On and after the Redemption Date for the Securities of any series, interest will cease to accrue on the Notes of that series or any portion thereof called for redemption, unless the Company defaults in the payment of the Redemption Price and accrued interest.

"Redemption Amount of Basis Points" means the amount of basis points applicable to a specific series of Securities used to calculate the Redemption Price pursuant to this Section 1108.

"Remaining Scheduled Payments" means, with respect to the Securities of any series to be redeemed, the remaining scheduled payments of the principal thereof and interest thereon that would

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be due after the related Redemption Date but for such redemption; provided, however, that, if such Redemption Date is not an Interest Payment Date with respect to the Notes of that series, the amount of the next succeeding scheduled interest payment thereon will be deemed to be reduced by the amount of interest accrued thereon to such Redemption Date.

"Treasury Rate" means, with respect to any Redemption Date for the Securities of any series:

(a) the yield, which represents the average for the immediately preceding week, appearing in the most recently published statistical release designated "H.15(519)" or any successor publication which is published weekly by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded United States Treasury securities adjusted to constant maturity under the caption "Treasury Constant Maturities," for the maturity corresponding to the Comparable Treasury Issue; provided that if no maturity is within three months before or after the maturity date for the Notes of that series, yields for the two published maturities most closely corresponding to the Comparable Treasury Issue will be determined and the Treasury Rate will be interpolated or extrapolated from those yields on a straight line basis, rounding to the nearest month; or

(b) if that release, or any successor release, is not published during the week preceding the calculation date or does not contain such yields, the rate per annum equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for that Redemption Date.

The Treasury Rate will be calculated on the third business day preceding the Redemption Date.

"Comparable Treasury Issue" means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Securities of the relevant series to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Securities of the relevant series.

"Independent Investment Banker" means one of the Reference Treasury Dealers, to be appointed by the Company.

"Comparable Treasury Price" means, with respect to any Redemption Date for the Securities:

(a) the average of four Reference Treasury Dealer Quotations for that Redemption Date, after excluding the highest and lowest of such Reference Treasury Dealer Quotations; or

(b) if the Trustee obtains fewer than four Reference Treasury Dealer Quotations, the average of all quotations obtained by the Trustee.

"Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Trustee, of the bid and asked prices for the Comparable Treasury Issue, expressed in each case as a percentage of its principal amount, quoted

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in writing to the Trustee by such Reference Treasury Dealer at 3:30 p.m., New York City time, on the third business day preceding such Redemption Date.

"Reference Treasury Dealer" means a primary United States government securities dealer selected by the Company.

SECTION 2.8. Application of the Article of the Indenture Relating to a Sinking Fund.

Except as may be provided in a Future Supplemental Indenture, none of the Securities, including the Notes, shall be entitled to the benefit of any sinking fund and the provisions of the Indenture relating to a sinking fund, including Article Twelve and Subsection (3) of Section 501of the Indenture, shall not apply to any of the Securities, including the Notes.

SECTION 2.9. Limitation on Liens.

Except as may be provided in a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, a new
Section 1008 shall be added to the Indenture as follows:

SECTION 1008 Limitation on Liens.

Other than as provided in Section 1010, the Company will not, and will not permit any Restricted Subsidiary to, create or assume any Indebtedness secured by any Lien on any Principal Property or shares of stock or Indebtedness of any Restricted Subsidiary, unless: (1) in the case of the Company, the Securities Outstanding are secured by such Lien equally and ratably with, or prior to, the Indebtedness secured by such Lien, or (2) in the case of any Subsidiary Guarantor, such Subsidiary Guarantor's existing Subsidiary Guarantee is secured by such Lien equally and ratably with, or prior to, the Indebtedness secured by such Lien. These restrictions shall not apply to any Indebtedness that is secured by:

(a) Liens existing on the date of this First Supplemental Indenture;

(b) Liens securing only the Securities;

(c) Liens in favor of only the Company or any Restricted Subsidiary;

(d) Liens on property or shares of stock or indebtedness of a Person existing at the time such Person becomes a Restricted Subsidiary or is merged into or consolidated with, or its assets are acquired by, the Company or any Restricted Subsidiary (provided that such Lien was not incurred in anticipation of such transaction and was in existence prior to such transaction) so long as such Lien does not extend to any other property and the Indebtedness so secured is not increased;

(e) Liens on property existing immediately prior to the acquisition thereof (provided that such Lien was not incurred in anticipation of such transaction and was in existence prior to such transaction) so long as such Lien does not extend to any other property and the Indebtedness so secured is not increased;

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(f) Liens to secure Indebtedness incurred for the purpose of financing all or any part of a property's purchase price or cost of construction or additions, repairs, alterations, or other improvements; provided that

(1) the principal amount of any Indebtedness secured by such Lien does not exceed 100% of such property's purchase price or cost,

(2) such Lien does not extend to or cover any other property other than the property so purchased, constructed or on which such additions, repairs, alterations or other improvements were so made, and

(3) such Lien is incurred prior to or within 270 days after the acquisition of such property or the completion of construction or such additions, repairs, alterations or other improvements and the full operation of such property thereafter;

(g) Liens in favor of the United States or any state thereof, or any instrumentality of either, to secure certain payments pursuant to any contract or statute;

(h) Liens for taxes or assessments or other governmental charges or levies which are being contested in good faith and for which adequate reserves are being maintained, to the extent required by generally accepted accounting principles;

(i) title exceptions, easements and other similar Liens that are not consensual and that do not materially impair the use of the property subject thereto;

(j) Liens to secure obligations under workmen's compensation laws, unemployment compensation, old-age pensions and other social security benefits or similar legislation, including Liens with respect to judgments which are not currently dischargeable;

(k) Liens arising out of legal proceedings, including Liens arising out of judgments or awards;

(l) warehousemen's, materialmen's and other similar Liens for sums being contested in good faith and for which adequate reserves are being maintained, to the extent required by generally accepted accounting principles;

(m) Liens incurred to secure the performance of statutory obligations, surety or appeal bonds, performance or return-of-money bonds or other obligations of a like nature incurred in the ordinary course of business; or

(n) Liens to secure any extension, renewal, refinancing or refunding (or successive extensions, renewals, refinancings or refundings), in whole or in part, of any Indebtedness secured by Liens referred to in the foregoing subsections of this
Section 1008 or Liens created in connection with any amendment, consent or waiver relating to such Indebtedness, so long as such Lien does not extend to any other property and the Indebtedness so secured does not exceed the fair market value (as determined by the Board of Directors of the Company) of the assets subject to such Liens at the time of such extension, renewal, refinancing or refunding, or such amendment, consent or waiver, as the case may be.

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SECTION 2.10. Limitation on Sale and Leaseback Transactions.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, a new
Section 1009 shall be added to the Indenture as follows:

SECTION 1009 Limitation on Sale and Leaseback Transactions.

Other than as provided in Section 1010, the Company will not, and will not permit any Restricted Subsidiary to, enter into any Sale and Leaseback Transaction with respect to any Principal Property unless:

(a) the Sale and Leaseback Transaction is solely with the Company or a Subsidiary Guarantor; or

(b) the lease is for a period not in excess of five years, including renewal rights; or

(c) the Company or the Restricted Subsidiary, prior to or within 270 days after the sale of such Principal Property in connection with the Sale and Leaseback Transaction is completed, applies the net cash proceeds of the sale of the Principal Property leased to:

(1) the retirement of the Securities or Indebtedness ranking equally with the Securities of the Company or any Restricted Subsidiary ranking equally with the Securities, or

(2) the acquisition of different property, facilities or equipment or the expansion of the Company's existing business, including the acquisition of other businesses.

SECTION 2.11. Exempted Liens and Sale and Leaseback Transactions.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, a new
Section 1010 shall be added to the Indenture as follows:

SECTION 1010 Exempted Liens and Sale and Leaseback Transactions.

Notwithstanding the restrictions described in Sections 1008 and 1009, the Company or any Restricted Subsidiary may create or assume any Liens or enter into any Sale and Leaseback Transactions not otherwise permitted pursuant to Sections 1008 and 1009, if the sum of the following does not exceed 5% of Consolidated Total Assets:

(a) the outstanding Indebtedness secured by such Liens (not including any Liens permitted under Section 1008 other than any Liens permitted solely under the provisions of this Section 1010); plus

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(b) all Attributable Debt in respect of such Sale and Leaseback Transaction entered into (not including any Sale and Leaseback Transactions permitted under Section 1009 other than any Sale and Leaseback Transactions permitted solely under this Section 1010),

measured, in each case, at the time such Lien is incurred or any such Sale and Leaseback Transaction is entered into by the Company or the Restricted Subsidiary.

SECTION 2.12. Limitation on Subsidiary Indebtedness and Preferred Stock.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, a new
Section 1011 shall be added to the Indenture as follows:

SECTION 1011 Limitation on Subsidiary Indebtedness and Preferred Stock.

None of the Subsidiaries of the Company other than the Subsidiary Guarantors may, directly or indirectly, create, incur, issue, assume or extend the maturity of any Indebtedness (including Acquired Indebtedness) or Preferred Stock except for the following, provided that, for purposes of this covenant, any Acquired Indebtedness shall not be deemed to have been incurred until 270 days from the date (1) the Person obligated on such Acquired Indebtedness becomes a Subsidiary of the Company or (2) the acquisition of assets, in connection with which such Acquired Indebtedness was assumed, is consummated:

(a) Indebtedness outstanding on the date of this First Supplemental Indenture;

(b) Indebtedness representing the assumption by one Subsidiary of Indebtedness of another Subsidiary;

(c) Indebtedness outstanding under any Receivables Credit Facility;

(d) Indebtedness secured by a Lien incurred for the purpose of financing all or any part of a property's purchase price or cost of construction or additions, repairs, alterations or other improvements, provided that such Indebtedness and Lien is incurred prior to or within 270 days after the acquisition of such property or the completion of construction or such additions, repairs, alterations or other improvements and the full operation of such property thereafter;

(e) Indebtedness of any Subsidiary of the Company, the proceeds of which are used to renew, extend, refinance or refund outstanding Indebtedness of such Subsidiary; provided that such Indebtedness is scheduled to mature no earlier than the Indebtedness being renewed, extended, refinanced or refunded; provided further that such Indebtedness shall be permitted hereunder only to the extent that the aggregate principal amount of such Indebtedness (or, if such Indebtedness is issued at a price less than the principal amount thereof, the aggregate amount of gross proceeds therefrom) does not exceed the aggregate principal amount then outstanding under the Indebtedness being renewed, extended, refinanced or refunded (or if the Indebtedness being renewed, extended, refinanced or refunded, was issued at a price less than the principal amount thereof, then not in excess of the amount of liability in respect thereof determined in accordance with generally accepted accounting principles) plus the lesser of (A) the stated amount of any premium or other payment required to be paid in connection with such a

14

refinancing pursuant to the terms of the Indebtedness being refinanced or (B) the amount of premium or other payment actually paid at such time to refinance the Indebtedness, plus, in either case, the amount of expenses of such Subsidiary incurred in connection with such refinancing;

(f) Indebtedness of a Subsidiary of the Company to the Company or to another Subsidiary of the Company;

(g) any Indebtedness resulting from a Sale and Leaseback Transaction which is permitted by Section 1009 (other than any Sale and Leaseback Transaction which is permitted solely pursuant to the provisions of Section 1010);

(h) any Permitted Acquired Indebtedness;

(i) Preferred Stock to the extent that the aggregate liquidation preference of Preferred Stock, outstanding at any one time, does not exceed 5% of Consolidated Total Assets; or

(j) any Indebtedness, including any Acquired Indebtedness that is not Permitted Acquired Indebtedness, the outstanding aggregate principal amount of which does not at any one time exceed the greater of (i) 10% of Consolidated Total Assets or (ii) $200 million, measured in each case at the time such Indebtedness is incurred.

SECTION 2.13. Consolidation, Merger, Conveyance or Transfer.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, Section 801 of the Indenture shall be amended by deleting the first sentence of Section 801 and Subsection (1) to Section 801 in their entirety and replacing such first sentence and subsection with the following:

The Company shall not consolidate with or merge with or into any other Person or sell, transfer or lease all or substantially all of its assets to any Person, unless:

(1) either the Company shall be the continuing corporation, or the corporation (if other than the Company) formed by such consolidation or into which the Company is merged or the Person which acquires by sale, transfer or lease of all or substantially all of the Company's assets shall (i) be organized under the laws of the United States or any state thereof and (ii) expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all of the obligations of the Company under this Indenture and on all the Securities and this Indenture;

SECTION 2.14. Additional Events of Default.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, Subsection 501 of the Indenture shall be amended by deleting Subsections (7) and
(8) thereof in its entirety and replacing such Subsections with new Subsections
(7) and (8) and adding a new Subsection (9) to Section 501 of the Indenture as follows:

(7) an event of default under any indenture or instrument evidencing or under which the Company or any Subsidiary Guarantor then has outstanding any Indebtedness shall occur and be continuing and either:

15

(A) such event of default results from the failure to pay the principal of such Indebtedness in excess of $50 million at final maturity of such Indebtedness, individually or in the aggregate, or

(B) as a result of such event of default the maturity of such Indebtedness shall have been accelerated so that the same shall be or become due and payable prior to the date on which the same would otherwise have become due and payable and the principal amount of such Indebtedness, together with the principal of any other Indebtedness of the Company or such Subsidiary Guarantor in default, or the maturity of which has been accelerated, aggregates at least $50 million, individually or in the aggregate; or

(8) any Subsidiary Guarantor repudiates its obligations under its Subsidiary Guarantee of the Securities of that series or, other than by reason of the termination of the Indenture or the release of any such Subsidiary Guarantee in accordance with Section 1605, any such Subsidiary Guarantee ceases to be in full force and effect or is declared null and void and such condition shall have continued for a period of 30 days after written notice of such failure requiring the Company or the Subsidiary Guarantor to remedy the same shall have been given to the Company by the Trustee or to the Company and the Trustee by the holders of 25% in aggregate principal amount of the Securities of that series then outstanding; or

(9) any other Event of Default provided with respect to Securities of that series.

SECTION 2.15. Application of the Article of the Indenture Regarding Defeasance and Covenant Defeasance.

Except as may be provided by a Future Supplemental Indenture, the provisions of Article Fourteen of the Indenture, including the provisions relating to defeasance and covenant defeasance of the Securities under Sections 1402 and 1403, respectively, of the Indenture shall apply to the Securities, including the Notes.

SECTION 2.16. Application of the Article of the Indenture Regarding Repayment at the Option of Holders.

Except as may be provided by a Future Supplemental Indenture, the provisions of Article Thirteen of the Indenture shall not apply to any of the Securities, including the Notes.

SECTION 2.17. Acceleration of Maturity; Rescission and Annulment.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, Section 502 of the Indenture shall be amended by deleting the first paragraph in its entirety and replacing such paragraph with the following:

If an Event of Default (other than an Event of Default specified in Section 501(5) or 501(6) with respect to the Company) with respect to Securities of any series at the time Outstanding occurs and is continuing, then and in every such case the Trustee or the Holders of not less than 25% in principal amount of the Outstanding Securities of that series may declare the entire principal amount and premium if any (or, if any Securities are Original Issue Discount Securities or Indexed Securities, such portion of the principal as may be specified in the terms thereof) and accrued interest of all the Securities of that series to be due and payable immediately, by a notice in writing to the Company (and to the

16

Trustee if given by the Holders), and upon any such declaration such principal or specified portion thereof and interest shall become immediately due and payable. If an Event of Default specified in Section 501(5) or 501(6) with respect to the Company or any Subsidiary Guarantor occurs, the amounts described above with respect to the Outstanding Securities of all series shall ipso facto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Holder. Upon payment of such principal and interest, all of the Company's obligations under the Securities of such Series and this Indenture, other than obligations under Section 606, shall terminate.

SECTION 2.18. Certain Rights of Trustee.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, Subsection (8) of Section 602 of the Indenture shall be amended by adding the words "Except pursuant to Section 502" before the words "the Trustee."

SECTION 2.19. Waiver of Certain Covenants.

Except as may be provided by a Future Supplemental Indenture, for the benefit of the Holders of all Securities, including the Notes, Section 1007 of the Indenture shall be amended by deleting such Section 1007 in its entirety and replacing such Section 1007 with the following:

SECTION 1007 Waiver of Certain Covenants.

With respect to the Securities of any series, the Company and the Subsidiary Guarantors may omit in any particular instance to comply with any term, provision or condition specified pursuant to Section 301 or any other provision of this Indenture, as it may be supplemented from time to time, other than any such term, provision or condition which is listed in Section 902(1) through (4), if before or after the time for such compliance the Holders of at least a majority in principal amount of all Outstanding Securities of such series, by Act of such Holders, waive such compliance in such instance or generally waive compliance with such term, provision or condition, but no such waiver shall extend to or affect such term, provision or condition except to the extent so expressly waived, and, until such waiver shall become effective, the obligations of the Company and the Subsidiary Guarantors and the duties of the Trustee in respect of any such term, provision or condition shall remain in full force and effect.

ARTICLE III.

MISCELLANEOUS

SECTION 3.1. Governing Law.

This First Supplemental Indenture and the Notes shall be governed by and construed in accordance with the laws of the State of New York, without regard to principles of conflicts of laws. This First Supplemental Indenture is subject to the provisions of the Trust Indenture Act that are required to be part of this Indenture and shall, to the extent applicable, be governed by such provisions.

SECTION 3.2. Separability.

In case any provision in this First Supplemental Indenture or in any Securities, including the Notes shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

17

SECTION 3.3. Counterparts.

This First Supplemental Indenture may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all such counterparts shall together constitute but one and the same Supplemental Indenture.

SECTION 3.4. Ratification.

The Base Indenture, as supplemented and amended by this First Supplemental Indenture, is in all respects ratified and confirmed, and the Base Indenture and this First Supplemental Indenture shall be read, taken and construed as one and the same instrument. All provisions included in this First Supplemental Indenture supersede any conflicting provisions included in the Base Indenture unless not permitted by law. The Trustee accepts the trusts created by the Indenture, as supplemented by this First Supplemental Indenture, and agrees to perform the same upon the terms and conditions of the Indenture, as supplemented by this First Supplemental Indenture.

SECTION 3.5. Effectiveness.

The provisions of this First Supplemental Indenture shall become effective as of the date hereof.

[Remainder of page intentionally left blank.]

18

IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be duly executed, and their respective corporate seals to be hereunto affixed and attested, all as of the date first above written.

QUEST DIAGNOSTICS INCORPORATED

Attest:                                     By: /s/ Joseph P. Manory
                                               ---------------------------------
                                            Name:   Joseph P. Manory
 /s/    Leo C. Farrenkopf, Jr.              Title:  Vice President and Treasurer
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            THE BANK OF NEW YORK,
                                              as Trustee


Attest:
                                            By: /s/ Marie E. Trimboli
                                               ---------------------------------
 /s/    William J. Cassels                  Name:   Marie E. Trimboli
------------------------------              Title:  Assistant Vice President
Name:   William J. Cassels
Title:

THE SUBSIDIARY GUARANTORS:

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED

                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS CLINICAL
                                              LABORATORIES, INC.


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

19

QUEST DIAGNOSTICS INCORPORATED
(CA)

                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS INCORPORATED
                                              (MD)


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS LLC


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS INCORPORATED
                                              (MI)


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS INCORPORATED
                                              (CT)


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

20

QUEST DIAGNOSTICS INCORPORATED
(MA)

                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS OF
                                              PENNSYLVANIA INC


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            QUEST DIAGNOSTICS INCORPORATED
                                              (OH)


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            METWEST INC.


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            NICHOLS INSTITUTE DIAGNOSTICS


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary

21

DPD HOLDINGS, INC.

                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            DIAGNOSTICS REFERENCE SERVICES
                                              INC.


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            LABORATORY HOLDINGS
                                              INCORPORATED


                                            By: /s/ Joseph P. Manory
                                               ---------------------------------
Attest:                                     Name:   Joseph P. Manory
                                            Title:  Vice President and Treasurer

 /s/    Leo C. Farrenkopf, Jr.
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary
                                            PATHOLOGY BUILDING PARTNERSHIP

By QUEST DIAGNOSTICS
INCORPORATED (MD)
as General Partner

Attest:

                                            By: /s/ Joseph P. Manory
 /s/    Leo C. Farrenkopf, Jr.              ------------------------------------
------------------------------              Name:   Joseph P. Manory
Name:   Leo C. Farrenkopf, Jr.              Title:  Vice President and Treasurer
Title:  Secretary
                                            QUEST DIAGNOSTICS
                                              INVESTMENTS INCORPORATED


                                            By: /s/ Peter C. Fulweiler
                                               ---------------------------------
                                            Name:   Peter C. Fulweiler
Attest:                                     Title:  President

 /s/    Leo C. Farrenkopf, Jr.
------------------------------              By:
                                               ---------------------------------
Name:   Leo C. Farrenkopf, Jr.              Name:
Title:  Secretary                           Title:

22

QUEST DIAGNOSTICS
FINANCE INCORPORATED

Attest:                                     By: /s/ Peter C. Fulweiler
                                               ---------------------------------
                                            Name:   Peter C. Fulweiler
 /s/    Leo C. Farrenkopf, Jr.              Title:  President
------------------------------
Name:   Leo C. Farrenkopf, Jr.
Title:  Secretary                           By:
                                               ---------------------------------
                                            Name:
                                            Title:

23

EXHIBIT A

Form of 6.75% Senior Note due 2006

[The following legends apply only if the Note is a Global Note:

THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A NOMINEE THEREOF. THIS NOTE MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND SUCH CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

A-1

QUEST DIAGNOSTICS INCORPORATED

6.75% Senior Note due 2006

Unconditionally guaranteed as to payment of principal of and interest by the Subsidiary Guarantors

No. 0 (Specimen) $275,000,000

CUSIP: 748 34L AD2

Quest Diagnostics Incorporated, a Delaware corporation (herein called the "Company," which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of $275,000,000 on July 12, 2006 (the "Stated Maturity") (except to the extent redeemed or repaid prior to the Stated Maturity) and to pay interest thereon from June 27, 2001 or from the most recent Interest Payment Date to which interest has been paid or duly provided for semi-annually at the rate of 6.75% per annum, on January 12 and July 12, commencing with January 12, 2002, on the Stated Maturity and on any Redemption Date (each such date, an "Interest Payment Date") until the principal hereof is paid or made available for payment.

Payment of Interest. The interest so payable, and punctually paid or made available for payment, on any Interest Payment Date, will, as provided in the Indenture, be paid, in immediately available funds, to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business January 1 or July 1 (whether or not a Business Day, as defined in the Indenture), as the case may be, next preceding such Interest Payment Date (the "Regular Record Date"). Any such interest not punctually paid or duly provided for ("Defaulted Interest") will forthwith cease to be payable to the Holder on such Regular Record Date, and such Defaulted Interest, may be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on a special record date (the "Special Record Date") for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Notes not less than ten days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Place of Payment. Payment of interest on this Note will be made at the Corporate Trust Office of the Trustee or such other office or agency of the Company as may be designated for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that each installment of interest and payment of principal on this Notes may at the Company's option be paid in immediately available funds by transfer to an account maintained by the payee located in the United States. Payment of the principal of this Note on the Stated Maturity will be made against presentation of this Note at the office or agency of the Company maintained for that purpose in the Borough of Manhattan, The City of New York, in such coin or currency of the United States of America as at the time of payment is legal tender for the payment of public and private debts.

Time of Payment. In any case where any Interest Payment Date, Redemption Date, Stated Maturity shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of the Indenture or this Note), payment of principal or interest, if any, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of

A-2

Payment with the same force and effect as if made on the Interest Payment Date, Redemption Date, or at Stated Maturity; provided that no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date, Repayment Date, or Stated Maturity, as the case may be.

Legends. The statements set forth in the restrictive legends above are an integral part of the terms of this Note and by acceptance hereof each Holder of this Note agrees to be subject to and bound by the terms and provisions set forth in such legend.

General. This Note is one of a duly authorized issue of securities (herein called the "Securities") of the Company, issued and to be issued in one or more series under an indenture, dated as of June 27, 2001, as it may be supplemented from time to time (herein called the "Indenture"), between the Company and The Bank of New York, Trustee (herein called the "Trustee", which term includes any successor trustee under the Indenture with respect to a series of which this Note is a part), to which indenture and all indentures supplemental thereto, including the supplemental indenture dated June 27, 2001 (the "Supplemental Indenture"), reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Note is one of a duly authorized series of Securities designated as "6.75 Senior Notes due 2006" (collectively, the "Notes"), initially limited in aggregate principal amount to $275,000,000.

Further Issuance. The Company may from time to time, without the consent of the Holders of Notes of this series, issue additional Notes (the "Additional Notes") of this series having the same ranking and the same interest rate, maturity and other terms as the Notes of this series. Any Additional Notes of this series and the Notes of this series will constitute a single series under the Indenture and all references to the Notes of this series shall include the Additional Notes unless the context otherwise requires.

[The following paragraph applies only if the Note is a Global Note:
Book-Entry. This Note is a Global Note representing $275,000,000 of the Notes. This Note is a "book entry" Note and is being registered in the name of Cede & Co. as nominee of The Depository Trust Company (the "Depository "), a clearing agency. Subject to the terms of the Indenture, this Note will be held by a clearing agency or its nominee, and beneficial interest will be held by beneficial owners through the book-entry facilities of such clearing agency or its nominee in minimum denominations of $1,000 and integral multiples thereof. As long as this Note is registered in the name of the Depository or its nominee, the Trustee will make payments of principal and interest on this Note by wire transfer of immediately available funds to the Depository or its nominee. Notwithstanding the above, the final payment on this Note will be made after due notice by the Trustee of the pendency of such payment and only upon presentation and surrender of this Note at its principal corporate trust office or such other offices or agencies appointed by the Trustee for that purpose and such other locations provided in the Indenture.]

Guarantees. This Note is entitled to the benefits of the Subsidiary Guarantees by each of the Subsidiary Guarantors of the due and punctual payment and performance of the Guarantor Obligations made in favor of the Trustee for the benefit of the Holder of this Note. Reference is hereby made to Article Sixteen of the Indenture for a statement of the respective rights, limitations of rights, duties and obligations under the Guarantees of each of the Guarantors.

Events of Default. If an Event of Default with respect to the Notes shall have occurred and be continuing, the principal of the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

A-3

Maturity. The Notes of this series are not subject to any sinking fund. The Notes of this series will be redeemable at any time, at the option of the Company, in whole or from time to time in part, upon not less than 30 nor more than 60 days' prior notice, on any date prior to their maturity at a Redemption Price, calculated pursuant to the Indenture, together with accrued interest thereon, if any, to the Redemption Date (subject to the rights of holders of record on the Regular Record Date that is prior to the Redemption Date to receive interest on the relevant Interest Payment Date). In the case of any partial redemption, selection of the Notes of this series for redemption will be made by the Trustee by such methods, as the Trustee in its sole discretion shall deem fair and appropriate. If any Note is to be redeemed in part only, the notice of redemption relating to such Note shall state the portion of the principal amount thereof to be redeemed. A new Note in principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder thereof upon cancellation of this Note.

Defeasance and Covenant Defeasance. The Indenture contains provisions for defeasance at any time of (a) the entire indebtedness of the Company on this Note and (b) certain restrictive covenants and the related Defaults and Events of Default, upon compliance by the Company with certain conditions set forth therein, which provisions apply to this Note.

Modification and Waivers; Obligations of the Company Absolute. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series. Such amendment may be effected under the Indenture at any time by the Company, the Subsidiary Guarantors and the Trustee with the consent of the Holders of not less than a majority in aggregate principal amount of the Outstanding Notes of each series affected thereby. The Indenture also contains provisions permitting the Holders of not less than a majority in aggregate principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Outstanding Securities, to waive compliance by the Company with certain provisions of the Indenture. Furthermore, provisions in the Indenture permit the Holders of not less than a majority in aggregate principal amount of the Outstanding Securities of individual series to waive on behalf of all of the Holders of Securities of such individual series certain past defaults under the Indenture and their consequences. Any such consent or waiver shall be conclusive and binding upon the Holder of this Note and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange hereof or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and interest on this Note at the time, place, and rate, and in the coin or currency, herein prescribed.

Limitation on Suits. As set forth in, and subject to, the provisions of the Indenture, no Holder of any Note of this series will have any right to institute any proceeding with respect to the Indenture or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with respect to this series, the Holders of not less than 25% in principal amount of the Outstanding Notes of this series shall have made written request, and offered reasonable indemnity, to the Trustee to institute such proceedings as trustee, and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Notes of this series a direction inconsistent with such request and shall have failed to institute such proceeding within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for the enforcement of payment of the principal of or interest on this Note on or after the respective due dates expressed herein.

A-4

Authorized Denominations. The Notes of this series are issuable only in registered form without coupons in denominations of $1,000 or any integral multiple thereof.

Registration of Transfer or Exchange. As provided in the Indenture and subject to certain limitations herein and therein set forth, the transfer of this Note is registrable in the Security Register upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

As provided in the Indenture and subject to certain limitations herein and therein set forth, the Notes are exchangeable for a like aggregate principal amount of Notes of different authorized denominations, as requested by the Holders surrendering the same.

[The following paragraph applies only if the Note is a Global Note:
This Note is a Global Security. If the Depository is at any time unwilling, unable or ineligible to continue as depository and a successor depository is not appointed by the Company within 90 days or an Event of Default under the Indenture has occurred and is continuing, the Company will issue Securities in certificated form in exchange for each Global Security. In addition, the Company may at any time determine not to have Securities represented by a Global Security and, in such event, will issue Securities in certificated form in exchange in whole for the Global Security representing such Security. In any such instance, an owner of a beneficial interest in a Global Security will be entitled to physical delivery in certificated form of Securities equal in principal amount to such beneficial interest and to have such Securities registered in its name. Securities so issued in certificated form will be issued in denominations of $1,000 or any amount in excess thereof which is an integral multiple of $1,000 and will be issued in registered form only, without coupons.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Note for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Holder as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.]

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Note shall be governed by and construed in accordance with the law of the State of New York.

Unless the certificate of authentication hereon has been executed by the Trustee by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

A-5

Dated:   , 2001
                                           QUEST DIAGNOSTICS INCORPORATED


                                           By:
                                              ----------------------------------
                                           Name:
Attest:                                    Title:


------------------------
Name:

Title:

A-6

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Notes of the series designated and referred to in the within-mentioned Indenture, as such is supplemented by the within-mentioned First Supplemental Indenture.

THE BANK OF NEW YORK
as Trustee

By
Authorized Signatory

Dated: , 2001

A-7

GUARANTEE OF THE INITIAL SUBSIDIARY GUARANTORS

FOR VALUE RECEIVED, each of the Initial Subsidiary Guarantors (as such term is defined in the Indenture, as amended by the First Supplemental Indenture), hereby, jointly and severally, unconditionally guarantees to the Holder of the Note upon which this Subsidiary Guarantee is endorsed (the "Note") and to the Trustee on behalf of the Holder, the prompt payment of the principal of (and premium, if any, on) and interest (including, in case of default, interest on principal and, to the extent permitted by applicable law, on overdue interest and including any additional interest required to be paid according to the terms of the Notes) on the Note, when due (whether at Stated Maturity, upon Redemption, upon acceleration, upon tender for repayment at the option of the Company), according to the terms hereof and the terms of the Indenture (the "Guarantor Obligations"). This Guarantee is a guarantee of payment and not of collection and is a continuing guarantee and shall apply to all Guarantor Obligations whenever arising.

Obligations Unconditional and Absolute. The obligations of the Initial Subsidiary Guarantors hereunder are absolute and unconditional irrespective of the value, genuineness, validity, regularity or enforceability of the Indenture or this Note, to the fullest extent permitted by applicable law, irrespective of any circumstance whatsoever which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor. Each of the Initial Subsidiary Guarantors agrees that this Guarantee may be enforced by the Holder of this Note without the necessity at any time of proceeding against the Company or any other Person (including a co-guarantor) or to pursue any other remedy or enforce any other right. Each of the Initial Guarantors further agrees that nothing contained herein shall prevent the Holder of this Note from suing on this Note or the Indenture or from exercising any other rights available under this Note and the Indenture, and the exercise of any of the aforesaid rights and shall not constitute a discharge of any Initial Subsidiary Guarantor's obligations hereunder and under the Indenture; it being the purpose and the intent of each Initial Subsidiary Guarantor that its obligations under this Note and under the Indenture shall be absolute, independent and unconditional under any and all circumstances. Neither any Initial Subsidiary Guarantor's obligations under this Guarantee nor any remedy for the enforcement thereof shall be impaired, modified, changed or released in any manner whatsoever by an impairment, modification, change, release or limitation of the liability of the Company or by reason of the bankruptcy or insolvency of the Company. Each Initial Subsidiary Guarantor waives any and all notice of the creation, renewal, extension or accrual of any of the Guarantor Obligations or acceptance of this Guarantee. The Guarantor Obligations, and any of them, shall conclusively be deemed to have been created, contracted or incurred, or renewed, extended, amended or waived, in reliance upon this Guarantee.

Subrogation. Each of the Initial Subsidiary Guarantors shall be subrogated to all rights of the Holder of the Note against the Company in respect of any amounts paid by such Initial Subsidiary Guarantor on account of the Note or the Indenture; provided, however, that such Initial Subsidiary Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (or premium, if any, on) and interest on all Notes of this series shall have been indefeasibly paid in full.

Modifications. Each Initial Subsidiary Guarantor agrees that
(a) the time or place of payment of the Guarantor Obligations may be changed or extended, in whole or in part, to a time certain or otherwise, and may be renewed or accelerated, in whole or in part; (b) the Company and any other party liable for payment under the Indenture or under the Note may be granted indulgences generally; (c) any of the

A-8

provisions of this Note or the Indenture may be modified, amended or waived; and
(d) any party (including any Subsidiary Guarantor) liable for the payment under this Note or under the Indenture may be granted indulgences or be released; all without notice to or further assent by such Initial Subsidiary Guarantor, which shall remain bound thereon, notwithstanding any such exchange, compromise, surrender, extension, renewal, acceleration, modification, indulgence or release.

Waiver of Rights. Each of the Initial Subsidiary Guarantors hereby waives to the fullest extent permitted by law: (a) notice of acceptance of this Guarantee by the Holder of this Note; (b) presentment and demand for payment or performance of any of the Guarantor Obligations; (c) protest and notice of dishonor or default with respect to the Guarantor Obligations; (d) all other notices to which such Initial Subsidiary Guarantor might otherwise be entitled.

Reinstatement. The obligations of the Initial Subsidiary Guarantors under this Note and under Article Sixteen shall be automatically reinstated if and to the extent that for any reason any payment by or on behalf of any Person in respect of the Guarantor Obligations is rescinded or must otherwise be restored by any Holder of the Notes of this series, whether as a result of any proceedings in bankruptcy or reorganization or otherwise.

Remedies. Each of the Initial Subsidiary Guarantors further agrees, to the fullest extent that it may lawfully do so, that as between each such Initial Subsidiary Guarantor, on the one hand, and the Holder and the Trustee, on the other hand, the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five of the Indenture for the purposes of this guarantee, notwithstanding any stay, injunction or other prohibition extant under any applicable bankruptcy law preventing such acceleration in respect of the obligations guaranteed hereby.

Rights of Contribution. The Initial Subsidiary Guarantors, in connection with payments made hereunder, shall have contribution rights against the other Subsidiary Guarantors as permitted under applicable law. Such contribution rights shall be subordinate and subject in right of payment to the obligations of the Subsidiary Guarantors under this Note and no Initial Subsidiary Guarantor shall exercise such rights of contribution until all Guarantor Obligations have been paid in full.

Limitation of Guaranty. Notwithstanding any provision to the contrary contained herein or in the Indenture, to the extent the obligations of any Initial Subsidiary Guarantor shall be adjudicated to be invalid or unenforceable for any reason (including, without limitation, because of any applicable state or federal law relating to fraudulent conveyances or transfers) then the obligations of the Initial Subsidiary Guarantors hereunder shall be limited to the maximum amount that is permissible under applicable law (whether federal or state or otherwise and including, without limitation, the Bankruptcy Code).

Release of Guarantors. Each of the Initial Subsidiary Guarantors hereby covenants that its Subsidiary Guarantee will not be discharged except by complete performance of its obligations contained in the Note, this Subsidiary Guarantee and pursuant to the Indenture; provided, however, that if
(a) an Initial Subsidiary Guarantor does not guarantee any Indebtedness of the Company the amount of which, when added together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary Guarantors, would exceed $50 million in the aggregate, excluding the Notes of this series, and all outstanding Indebtedness of such Subsidiary Guarantor would have been permitted to be

A-9

incurred pursuant to Section 1011 of the Indenture measured at the time of the release and discharge as described in this paragraph, (b) the Notes of this series are defeased and discharged pursuant to Article Fourteen of the Indenture, or (c) all or substantially all of the assets of such Initial Subsidiary Guarantor or all of the capital stock of such Initial Subsidiary Guarantor is sold (including by issuance, merger, consolidation or otherwise) by the Company or any of its Subsidiaries, then in each case of (a), (b) or (c) above, such Subsidiary Guarantor or the corporation acquiring such assets (in the event of a sale or other disposition of all or substantially all of the assets or capital stock of such Subsidiary Guarantor) shall be automatically and without any further action on the part of any party to the Indenture, and upon notice to the Trustee, be fully released and discharged from all its liabilities and obligations under or in respect of the Indenture and this Subsidiary Guarantee of the Note, and promptly upon the request of the Company and at the expense of the Company, the Trustee shall execute such documents and take such other action as is reasonably requested by the Company to evidence the release and discharge of such Guarantor from all such liabilities and obligations and shall, if applicable, certify to the Company that such Initial Subsidiary Guarantor has no liabilities or obligations resulting from a demand on such Initial Subsidiary Guarantor's Guarantee.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Subsidiary Guarantee shall be governed by and construed in accordance with the law of the State of New York.

Subject to the next following paragraph, each Initial Subsidiary Guarantor hereby certifies and warrants that all acts, conditions and things required to be done and performed and to have happened precedent to the creation and issuance of this Subsidiary Guarantee and to constitute the same valid obligation of each Initial Subsidiary Guarantor have been done and performed and have happened in due compliance with all applicable laws.

(Remainder of page intentionally left blank.)

A-10

This Subsidiary Guarantee shall not be valid or become obligatory for any purpose until the certificate of authentication on the Note upon which this Subsidiary Guarantee is endorsed has been signed by the Trustee under the Indenture referred to in this Note.

Dated: _______________, 2001

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED

                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS CLINICAL
                                             LABORATORIES, INC.


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS INCORPORATED (CA)


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:

Title:

A-11

QUEST DIAGNOSTICS INCORPORATED (MD)

                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS LLC


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS INCORPORATED (MI)


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS INCORPORATED (CT)


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:

Title:

A-12

QUEST DIAGNOSTICS INCORPORATED (MA)

                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS OF PENNSYLVANIA
                                             INC.


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           QUEST DIAGNOSTICS INCORPORATED (OH)


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           METWEST INC.


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:

Title:

A-13

NICHOLS INSTITUTE DIAGNOSTICS

                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           DPD HOLDINGS, INC.


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           DIAGNOSTICS REFERENCE SERVICES INC.


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:
Title:
                                           LABORATORY HOLDINGS INCORPORATED


                                           By:
                                              ----------------------------------
Attest:                                    Name:
                                           Title:

----------------------------
Name:

Title:

A-14

PATHOLOGY BUILDING PARTNERSHIP

                                           By Quest Diagnostics Incorporated
                                             (MD) As General Partner
Attest:
                                           By:
                                              ----------------------------------
                                           Name:
----------------------------               Title:
Name:
Title:
                                           QUEST DIAGNOSTICS
                                           INVESTMENTS INCORPORATED


Attest:                                    By:
                                              ----------------------------------
                                           Name:
                                           Title:
----------------------------
Name:
Title:                                     By:
                                              ----------------------------------
                                           Name:
                                           Title:

                                           QUEST DIAGNOSTICS
                                           FINANCE INCORPORATED


Attest:                                    By:
                                              ----------------------------------
                                           Name:
                                           Title:
----------------------------
Name:
Title:                                     By:
                                              ----------------------------------
                                           Name:

Title:

A-15

EXHIBIT B

Form of 7.50% Senior Note due 2011

[The following legends apply only if the Note is a Global Note:
THIS NOTE IS A GLOBAL NOTE WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A NOMINEE THEREOF. THIS NOTE MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND SUCH CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

B-1

EXHIBIT B

QUEST DIAGNOSTICS INCORPORATED

7.50% Senior Note due 2011

Unconditionally guaranteed as to payment of principal of and interest by the Subsidiary Guarantors

No. 0 (Specimen) $275,000,000

CUSIP: 748 34L AE0

Quest Diagnostics Incorporated, a Delaware corporation (herein called the "Company," which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of $275,000,000 on July 12, 2011 (the "Stated Maturity") (except to the extent redeemed or repaid prior to the Stated Maturity) and to pay interest thereon from June 27, 2001 or from the most recent Interest Payment Date to which interest has been paid or duly provided for semi-annually at the rate of 7.50% per annum, on January 12 and July 12, commencing with January 12, 2002, on the Stated Maturity and on any Redemption Date (each such date, an "Interest Payment Date") until the principal hereof is paid or made available for payment.

Payment of Interest. The interest so payable, and punctually paid or made available for payment, on any Interest Payment Date, will, as provided in the Indenture, be paid, in immediately available funds, to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business January 1 or July 1 (whether or not a Business Day, as defined in the Indenture), as the case may be, next preceding such Interest Payment Date (the "Regular Record Date"). Any such interest not punctually paid or duly provided for ("Defaulted Interest") will forthwith cease to be payable to the Holder on such Regular Record Date, and such Defaulted Interest, may be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on a special record date (the "Special Record Date") for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Notes not less than ten days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Place of Payment. Payment of interest on this Note will be made at the Corporate Trust Office of the Trustee or such other office or agency of the Company as may be designated for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that each installment of interest and payment of principal on this Notes may at the Company's option be paid in immediately available funds by transfer to an account maintained by the payee located in the United States. Payment of the principal of this Note on the Stated Maturity will be made against presentation of this Note at the office or agency of the Company maintained for that purpose in the Borough of Manhattan, The City of New York, in such coin or currency of the United States of America as at the time of payment is legal tender for the payment of public and private debts.

Time of Payment. In any case where any Interest Payment Date, Redemption Date, Stated Maturity shall not be a Business Day at any Place of Payment, then (notwithstanding any other

B-2

provision of the Indenture or this Note), payment of principal or interest, if any, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force and effect as if made on the Interest Payment Date, Redemption Date, or at Stated Maturity; provided that no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date, Repayment Date, or Stated Maturity, as the case may be.

Legends. The statements set forth in the restrictive legends above are an integral part of the terms of this Note and by acceptance hereof each Holder of this Note agrees to be subject to and bound by the terms and provisions set forth in such legend.

General. This Note is one of a duly authorized issue of securities (herein called the "Securities") of the Company, issued and to be issued in one or more series under an indenture, dated as of June 27, 2001, as it may be supplemented from time to time (herein called the "Indenture"), between the Company and The Bank of New York, Trustee (herein called the "Trustee", which term includes any successor trustee under the Indenture with respect to a series of which this Note is a part), to which indenture and all indentures supplemental thereto, including the supplemental indenture dated June 27, 2001 (the "Supplemental Indenture"), reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Note is one of a duly authorized series of Securities designated as "7.50 Senior Notes due 2011" (collectively, the "Notes"), initially limited in aggregate principal amount to $275,000,000.

Further Issuance. The Company may from time to time, without the consent of the Holders of Notes of this series, issue additional Notes (the "Additional Notes") of this series having the same ranking and the same interest rate, maturity and other terms as the Notes of this series. Any Additional Notes of this series and the Notes of this series will constitute a single series under the Indenture and all references to the Notes of this series shall include the Additional Notes unless the context otherwise requires.

[The following paragraph applies only if the Note is a Global Note:
Book-Entry. This Note is a Global Note representing $275,000,000 of the Notes. This Note is a "book entry" Note and is being registered in the name of Cede & Co. as nominee of The Depository Trust Company (the "Depository "), a clearing agency. Subject to the terms of the Indenture, this Note will be held by a clearing agency or its nominee, and beneficial interest will be held by beneficial owners through the book-entry facilities of such clearing agency or its nominee in minimum denominations of $1,000 and integral multiples thereof. As long as this Note is registered in the name of the Depository or its nominee, the Trustee will make payments of principal and interest on this Note by wire transfer of immediately available funds to the Depository or its nominee. Notwithstanding the above, the final payment on this Note will be made after due notice by the Trustee of the pendency of such payment and only upon presentation and surrender of this Note at its principal corporate trust office or such other offices or agencies appointed by the Trustee for that purpose and such other locations provided in the Indenture.]

Guarantees. This Note is entitled to the benefits of the Subsidiary Guarantees by each of the Subsidiary Guarantors of the due and punctual payment and performance of the Guarantor Obligations made in favor of the Trustee for the benefit of the Holder of this Note. Reference is hereby made to Article Sixteen of the Indenture for a statement of the respective rights, limitations of rights, duties and obligations under the Guarantees of each of the Guarantors.

B-3

Events of Default. If an Event of Default with respect to the Notes shall have occurred and be continuing, the principal of the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Maturity. The Notes of this series are not subject to any sinking fund. The Notes of this series will be redeemable at any time, at the option of the Company, in whole or from time to time in part, upon not less than 30 nor more than 60 days' prior notice, on any date prior to their maturity at a Redemption Price, calculated pursuant to the Indenture, together with accrued interest thereon, if any, to the Redemption Date (subject to the rights of holders of record on the Regular Record Date that is prior to the Redemption Date to receive interest on the relevant Interest Payment Date). In the case of any partial redemption, selection of the Notes of this series for redemption will be made by the Trustee by such methods, as the Trustee in its sole discretion shall deem fair and appropriate. If any Note is to be redeemed in part only, the notice of redemption relating to such Note shall state the portion of the principal amount thereof to be redeemed. A new Note in principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder thereof upon cancellation of this Note.

Defeasance and Covenant Defeasance. The Indenture contains provisions for defeasance at any time of (a) the entire indebtedness of the Company on this Note and (b) certain restrictive covenants and the related Defaults and Events of Default, upon compliance by the Company with certain conditions set forth therein, which provisions apply to this Note.

Modification and Waivers; Obligations of the Company Absolute. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series. Such amendment may be effected under the Indenture at any time by the Company, the Subsidiary Guarantors and the Trustee with the consent of the Holders of not less than a majority in aggregate principal amount of the Outstanding Notes of each series affected thereby. The Indenture also contains provisions permitting the Holders of not less than a majority in aggregate principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Outstanding Securities, to waive compliance by the Company with certain provisions of the Indenture. Furthermore, provisions in the Indenture permit the Holders of not less than a majority in aggregate principal amount of the Outstanding Securities of individual series to waive on behalf of all of the Holders of Securities of such individual series certain past defaults under the Indenture and their consequences. Any such consent or waiver shall be conclusive and binding upon the Holder of this Note and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange hereof or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and interest on this Note at the time, place, and rate, and in the coin or currency, herein prescribed.

Limitation on Suits. As set forth in, and subject to, the provisions of the Indenture, no Holder of any Note of this series will have any right to institute any proceeding with respect to the Indenture or for any remedy thereunder, unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with respect to this series, the Holders of not less than 25% in principal amount of the Outstanding Notes of this series shall have made written request, and offered reasonable indemnity, to the Trustee to institute such proceedings as trustee, and the Trustee shall not have received from the Holders of a majority in principal amount of the Outstanding Notes of this series a direction inconsistent with such request and shall have failed to institute such proceeding within 60 days; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for

B-4

the enforcement of payment of the principal of or interest on this Note on or after the respective due dates expressed herein.

Authorized Denominations. The Notes of this series are issuable only in registered form without coupons in denominations of $1,000 or any integral multiple thereof.

Registration of Transfer or Exchange. As provided in the Indenture and subject to certain limitations herein and therein set forth, the transfer of this Note is registrable in the Security Register upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

As provided in the Indenture and subject to certain limitations herein and therein set forth, the Notes are exchangeable for a like aggregate principal amount of Notes of different authorized denominations, as requested by the Holders surrendering the same.

[The following paragraph applies only if the Note is a Global Note:
This Note is a Global Security. If the Depository is at any time unwilling, unable or ineligible to continue as depository and a successor depository is not appointed by the Company within 90 days or an Event of Default under the Indenture has occurred and is continuing, the Company will issue Securities in certificated form in exchange for each Global Security. In addition, the Company may at any time determine not to have Securities represented by a Global Security and, in such event, will issue Securities in certificated form in exchange in whole for the Global Security representing such Security. In any such instance, an owner of a beneficial interest in a Global Security will be entitled to physical delivery in certificated form of Securities equal in principal amount to such beneficial interest and to have such Securities registered in its name. Securities so issued in certificated form will be issued in denominations of $1,000 or any amount in excess thereof which is an integral multiple of $1,000 and will be issued in registered form only, without coupons.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Note for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Holder as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.]

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Note shall be governed by and construed in accordance with the law of the State of New York.

Unless the certificate of authentication hereon has been executed by the Trustee by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

B-5

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

Dated:   , 2001
                                            QUEST DIAGNOSTICS INCORPORATED


                                            By:
                                               ---------------------------------
                                            Name:
Attest:                                     Title:


------------------------
Name:

Title:

B-6

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Notes of the series designated and referred to in the within-mentioned Indenture, as such is supplemented by the within-mentioned First Supplemental Indenture.

THE BANK OF NEW YORK
as Trustee

By
Authorized Signatory

Dated: , 2001

B-7

GUARANTEE OF THE INITIAL SUBSIDIARY GUARANTORS

FOR VALUE RECEIVED, each of the Initial Subsidiary Guarantors (as such term is defined in the Indenture, as amended by the First Supplemental Indenture), hereby, jointly and severally, unconditionally guarantees to the Holder of the Note upon which this Subsidiary Guarantee is endorsed (the "Note") and to the Trustee on behalf of the Holder, the prompt payment of the principal of (and premium, if any, on) and interest (including, in case of default, interest on principal and, to the extent permitted by applicable law, on overdue interest and including any additional interest required to be paid according to the terms of the Notes) on the Note, when due (whether at Stated Maturity, upon Redemption, upon acceleration, upon tender for repayment at the option of the Company), according to the terms hereof and the terms of the Indenture (the "Guarantor Obligations"). This Guarantee is a guarantee of payment and not of collection and is a continuing guarantee and shall apply to all Guarantor Obligations whenever arising.

Obligations Unconditional and Absolute. The obligations of the Initial Subsidiary Guarantors hereunder are absolute and unconditional irrespective of the value, genuineness, validity, regularity or enforceability of the Indenture or this Note, to the fullest extent permitted by applicable law, irrespective of any circumstance whatsoever which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor. Each of the Initial Subsidiary Guarantors agrees that this Guarantee may be enforced by the Holder of this Note without the necessity at any time of proceeding against the Company or any other Person (including a co-guarantor) or to pursue any other remedy or enforce any other right. Each of the Initial Guarantors further agrees that nothing contained herein shall prevent the Holder of this Note from suing on this Note or the Indenture or from exercising any other rights available under this Note and the Indenture, and the exercise of any of the aforesaid rights and shall not constitute a discharge of any Initial Subsidiary Guarantor's obligations hereunder and under the Indenture; it being the purpose and the intent of each Initial Subsidiary Guarantor that its obligations under this Note and under the Indenture shall be absolute, independent and unconditional under any and all circumstances. Neither any Initial Subsidiary Guarantor's obligations under this Guarantee nor any remedy for the enforcement thereof shall be impaired, modified, changed or released in any manner whatsoever by an impairment, modification, change, release or limitation of the liability of the Company or by reason of the bankruptcy or insolvency of the Company. Each Initial Subsidiary Guarantor waives any and all notice of the creation, renewal, extension or accrual of any of the Guarantor Obligations or acceptance of this Guarantee. The Guarantor Obligations, and any of them, shall conclusively be deemed to have been created, contracted or incurred, or renewed, extended, amended or waived, in reliance upon this Guarantee.

Subrogation. Each of the Initial Subsidiary Guarantors shall be subrogated to all rights of the Holder of the Note against the Company in respect of any amounts paid by such Initial Subsidiary Guarantor on account of the Note or the Indenture; provided, however, that such Initial Subsidiary Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (or premium, if any, on) and interest on all Notes of this series shall have been indefeasibly paid in full.

Modifications. Each Initial Subsidiary Guarantor agrees that
(a) the time or place of payment of the Guarantor Obligations may be changed or extended, in whole or in part, to a time certain or otherwise, and may be renewed or accelerated, in whole or in part; (b) the Company and any other party liable for payment under the Indenture or under the Note may be granted indulgences generally; (c) any of the provisions of this Note or the Indenture may be modified, amended or waived; and (d) any party (including any Subsidiary Guarantor) liable for the payment under this Note or under the Indenture may be granted indulgences or be released; all without notice to or further assent by such Initial Subsidiary Guarantor, which

B-8

shall remain bound thereon, notwithstanding any such exchange, compromise, surrender, extension, renewal, acceleration, modification, indulgence or release.

Waiver of Rights. Each of the Initial Subsidiary Guarantors hereby waives to the fullest extent permitted by law: (a) notice of acceptance of this Guarantee by the Holder of this Note; (b) presentment and demand for payment or performance of any of the Guarantor Obligations; (c) protest and notice of dishonor or default with respect to the Guarantor Obligations; (d) all other notices to which such Initial Subsidiary Guarantor might otherwise be entitled.

Reinstatement. The obligations of the Initial Subsidiary Guarantors under this Note and under Article Sixteen shall be automatically reinstated if and to the extent that for any reason any payment by or on behalf of any Person in respect of the Guarantor Obligations is rescinded or must otherwise be restored by any Holder of the Notes of this series, whether as a result of any proceedings in bankruptcy or reorganization or otherwise.

Remedies. Each of the Initial Subsidiary Guarantors further agrees, to the fullest extent that it may lawfully do so, that as between each such Initial Subsidiary Guarantor, on the one hand, and the Holder and the Trustee, on the other hand, the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five of the Indenture for the purposes of this guarantee, notwithstanding any stay, injunction or other prohibition extant under any applicable bankruptcy law preventing such acceleration in respect of the obligations guaranteed hereby.

Rights of Contribution. The Initial Subsidiary Guarantors, in connection with payments made hereunder, shall have contribution rights against the other Subsidiary Guarantors as permitted under applicable law. Such contribution rights shall be subordinate and subject in right of payment to the obligations of the Subsidiary Guarantors under this Note and no Initial Subsidiary Guarantor shall exercise such rights of contribution until all Guarantor Obligations have been paid in full.

Limitation of Guaranty. Notwithstanding any provision to the contrary contained herein or in the Indenture, to the extent the obligations of any Initial Subsidiary Guarantor shall be adjudicated to be invalid or unenforceable for any reason (including, without limitation, because of any applicable state or federal law relating to fraudulent conveyances or transfers) then the obligations of the Initial Subsidiary Guarantors hereunder shall be limited to the maximum amount that is permissible under applicable law (whether federal or state or otherwise and including, without limitation, the Bankruptcy Code).

Release of Guarantors. Each of the Initial Subsidiary Guarantors hereby covenants that its Subsidiary Guarantee will not be discharged except by complete performance of its obligations contained in the Note, this Subsidiary Guarantee and pursuant to the Indenture; provided, however, that if
(a) an Initial Subsidiary Guarantor does not guarantee any Indebtedness of the Company the amount of which, when added together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary Guarantors, would exceed $50 million in the aggregate, excluding the Notes of this series, and all outstanding Indebtedness of such Subsidiary Guarantor would have been permitted to be incurred pursuant to Section 1011 of the Indenture measured at the time of the release and discharge as described in this paragraph, (b) the Notes of this series are defeased and discharged pursuant to Article Fourteen of the Indenture, or (c) all or substantially all of the assets of such Initial Subsidiary Guarantor or all of the capital stock of such Initial Subsidiary Guarantor is sold (including by issuance, merger, consolidation or otherwise) by the Company or any of its Subsidiaries, then in each case of (a), (b) or (c) above, such Subsidiary Guarantor or the corporation acquiring such assets (in the event of a sale or other disposition of all or substantially all of the assets or capital stock of such Subsidiary Guarantor) shall be automatically and without any further action on the part of any party to the Indenture, and upon

B-9

notice to the Trustee, be fully released and discharged from all its liabilities and obligations under or in respect of the Indenture and this Subsidiary Guarantee of the Note, and promptly upon the request of the Company and at the expense of the Company, the Trustee shall execute such documents and take such other action as is reasonably requested by the Company to evidence the release and discharge of such Guarantor from all such liabilities and obligations and shall, if applicable, certify to the Company that such Initial Subsidiary Guarantor has no liabilities or obligations resulting from a demand on such Initial Subsidiary Guarantor's Guarantee.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Subsidiary Guarantee shall be governed by and construed in accordance with the law of the State of New York.

Subject to the next following paragraph, each Initial Subsidiary Guarantor hereby certifies and warrants that all acts, conditions and things required to be done and performed and to have happened precedent to the creation and issuance of this Subsidiary Guarantee and to constitute the same valid obligation of each Initial Subsidiary Guarantor have been done and performed and have happened in due compliance with all applicable laws.

(Remainder of page intentionally left blank.)

B-10

This Subsidiary Guarantee shall not be valid or become obligatory for any purpose until the certificate of authentication on the Note upon which this Subsidiary Guarantee is endorsed has been signed by the Trustee under the Indenture referred to in this Note.

Dated: _______________, 2001

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED

                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS CLINICAL
                                              LABORATORIES, INC.


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS INCORPORATED (CA)


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:

Title:

B-11

QUEST DIAGNOSTICS INCORPORATED (MD)

                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS LLC


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS INCORPORATED (MI)


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS INCORPORATED (CT)


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:

Title:

B-12

QUEST DIAGNOSTICS INCORPORATED (MA)

                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS OF PENNSYLVANIA
                                              INC.


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            QUEST DIAGNOSTICS INCORPORATED (OH)


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            METWEST INC.


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:

Title:

B-13

NICHOLS INSTITUTE DIAGNOSTICS

                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            DPD HOLDINGS, INC.


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            DIAGNOSTICS REFERENCE SERVICES INC.


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:
Title:
                                            LABORATORY HOLDINGS INCORPORATED


                                            By:
                                               ---------------------------------
Attest:                                     Name:
                                            Title:

----------------------------
Name:

Title:

B-14

PATHOLOGY BUILDING PARTNERSHIP

                                            By Quest Diagnostics Incorporated
                                               (MD) As General Partner
Attest:
                                            By:
                                               ---------------------------------
                                            Name:
----------------------------                Title:
Name:
Title:
                                            Quest Diagnostics
                                            INVESTMENTS Incorporated


Attest:                                     By:
                                               ---------------------------------
                                            Name:
                                            Title:
----------------------------
Name:
Title:                                      By:
                                               ---------------------------------
                                            Name:
                                            Title:

                                            QUEST DIAGNOSTICS
                                            FINANCE INCORPORATED


Attest:                                     By:
                                               ---------------------------------
                                            Name:
                                            Title:
----------------------------
Name:
Title:                                      By:
                                               ---------------------------------
                                            Name:

Title:

B-15

EXHIBIT C

FORM OF ADDITIONAL SUBSIDIARY GUARANTEE

FOR VALUE RECEIVED, each of the Subsidiary Guarantors executing this additional Subsidiary Guarantee (the "Additional Subsidiary Guarantors"), hereby fully and unconditionally guarantees, jointly and severally, together with the existing Subsidiary Guarantors (as such term is defined in the Indenture) of the Note, to the Holder of the Note upon which this additional Subsidiary Guarantee is endorsed (the "Note") and to the Trustee on behalf of the Holder, the prompt payment of the principal of (and premium, if any, on) and interest (including, in case of default, interest on principal and, to the extent permitted by applicable law, on overdue interest and including any additional interest required to be paid according to the terms of the Notes) on the Note, when due (whether at Stated Maturity, upon Redemption, upon acceleration, upon tender for repayment at the option of the Company), according to the terms hereof and the terms of the Indenture (the "Guarantor Obligations"). This Guarantee is a guarantee of payment and not of collection and is a continuing guarantee and shall apply to all Guarantor Obligations whenever arising.

Obligations Unconditional and Absolute. The obligations of the Additional Subsidiary Guarantors hereunder are absolute and unconditional irrespective of the value, genuineness, validity, regularity or enforceability of the Indenture or this Note, to the fullest extent permitted by applicable law, irrespective of any circumstance whatsoever which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor. Each of the Additional Subsidiary Guarantors agrees that this Guarantee may be enforced by the Holder of this Note without the necessity at any time of proceeding against the Company or any other Person (including a co-guarantor) or to pursue any other remedy or enforce any other right. Each of the Initial Guarantors further agrees that nothing contained herein shall prevent the Holder of this Note from suing on this Note or the Indenture or from exercising any other rights available under this Note and the Indenture, and the exercise of any of the aforesaid rights and shall not constitute a discharge of any Additional Subsidiary Guarantor's obligations hereunder and under the Indenture; it being the purpose and the intent of each Additional Subsidiary Guarantor that its obligations under this Note and under the Indenture shall be absolute, independent and unconditional under any and all circumstances. Neither any Additional Subsidiary Guarantor's obligations under this Subsidiary Guarantee nor any remedy for the enforcement thereof shall be impaired, modified, changed or released in any manner whatsoever by an impairment, modification, change, release or limitation of the liability of the Company or by reason of the bankruptcy or insolvency of the Company. Each Additional Subsidiary Guarantor waives any and all notice of the creation, renewal, extension or accrual of any of the Guarantor Obligations or acceptance of this Subsidiary Guarantee. The Guarantor Obligations, and any of them, shall conclusively be deemed to have been created, contracted or incurred, or renewed, extended, amended or waived, in reliance upon this Guarantee.

Subrogation. Each of the Additional Subsidiary Guarantors shall be subrogated to all rights of the Holder of the Note against the Company in respect of any amounts paid by such Additional Subsidiary Guarantor on account of the Note or the Indenture; provided, however, that such Additional Subsidiary Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (or premium, if any, on) and interest on all Notes of this series shall have been indefeasibly paid in full.

C-1

Modifications. Each Initial Subsidiary Guarantor agrees that
(a) the time or place of payment of the Guarantor Obligations may be changed or extended, in whole or in part, to a time certain or otherwise, and may be renewed or accelerated, in whole or in part; (b) the Company and any other party liable for payment under the Indenture or under the Note may be granted indulgences generally; (c) any of the provisions of this Note or the Indenture may be modified, amended or waived; and (d) any party (including any Subsidiary Guarantor) liable for the payment under this Note or under the Indenture may be granted indulgences or be released; all without notice to or further assent by such Initial Subsidiary Guarantor, which shall remain bound thereon, notwithstanding any such exchange, compromise, surrender, extension, renewal, acceleration, modification, indulgence or release.

Waiver of Rights. Each of the Additional Subsidiary Guarantors hereby waives to the fullest extent permitted by law: (a) notice of acceptance of this Guarantee by the Holder of this Note; (b) presentment and demand for payment or performance of any of the Guarantor Obligations; (c) protest and notice of dishonor or default with respect to the Guarantor Obligations; (d) all other notices to which such Additional Subsidiary Guarantor might otherwise be entitled.

Reinstatement. The obligations of the Additional Subsidiary Guarantors under this Note and under Article Sixteen shall be automatically reinstated if and to the extent that for any reason any payment by or on behalf of any Person in respect of the Guarantor Obligations is rescinded or must otherwise be restored by any Holder of the Notes of this series, whether as a result of any proceedings in bankruptcy or reorganization or otherwise.

Remedies. Each of the Additional Subsidiary Guarantors further agrees, to the fullest extent that it may lawfully do so, that as between each such Additional Subsidiary Guarantor, on the one hand, and the Holder and the Trustee, on the other hand, the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five of the Indenture for the purposes of this guarantee, notwithstanding any stay, injunction or other prohibition extant under any applicable bankruptcy law preventing such acceleration in respect of the obligations guaranteed hereby.

Rights of Contribution. The Additional Guarantors, in connection with payments made hereunder, shall have contribution rights against the other Subsidiary Guarantors as permitted under applicable law. Such contribution rights shall be subordinate and subject in right of payment to the obligations of the Subsidiary Guarantors under this Note and no Additional Subsidiary Guarantor shall exercise such rights of contribution until all Guarantor Obligations have been paid in full.

Limitation of Guaranty. Notwithstanding any provision to the contrary contained herein or in the Indenture, to the extent the obligations of any Additional Subsidiary Guarantor shall be adjudicated to be invalid or unenforceable for any reason (including, without limitation, because of any applicable state or federal law relating to fraudulent conveyances or transfers) then the obligations of the Additional Subsidiary Guarantors hereunder shall be limited to the maximum amount that is permissible under applicable law (whether federal or state or otherwise and including, without limitation, the Bankruptcy Code).

Release of Guarantors. Each of the Additional Subsidiary Guarantors hereby covenants that its Subsidiary Guarantee will not be discharged except by complete performance

C-2

of its obligations contained in the Note, this Subsidiary Guarantee and pursuant to the Indenture; provided, however, that if (a) an Additional Subsidiary Guarantor does not guarantee any Indebtedness of the Company the amount of which, when added together with any other outstanding Indebtedness of the Company guaranteed by its Subsidiaries that are not Subsidiary Guarantors, would exceed $50 million in the aggregate, excluding the Notes of this series, and all outstanding Indebtedness of such Subsidiary Guarantor would have been permitted to be incurred pursuant to Section 1011 of the Indenture measured at the time of the release and discharge as described in this paragraph, (b) the Notes of this series are defeased and discharged pursuant to Article Fourteen of the Indenture, or (c) all or substantially all of the assets of such Additional Subsidiary Guarantor or all of the capital stock of such Additional Subsidiary Guarantor is sold (including by issuance, merger, consolidation or otherwise) by the Company or any of its Subsidiaries, then in each case of (a), (b) or (c) above, such Subsidiary Guarantor or the corporation acquiring such assets (in the event of a sale or other disposition of all or substantially all of the assets or capital stock of such Subsidiary Guarantor) shall be automatically and without any further action on the part of any party to the Indenture, and upon notice to the Trustee, be fully released and discharged from all its liabilities and obligations under or in respect of the Indenture and this Subsidiary Guarantee of the Note, and promptly upon the request of the Company and at the expense of the Company, the Trustee shall execute such documents and take such other action as is reasonably requested by the Company to evidence the release and discharge of such Guarantor from all such liabilities and obligations and shall, if applicable, certify to the Company that such Additional Subsidiary Guarantor has no liabilities or obligations resulting from a demand on such Additional Subsidiary Guarantor's Guarantee.

Defined Terms. All terms used in this Note, which are defined in the Indenture and are not otherwise defined herein, shall have the meanings assigned to them in the Indenture.

Governing Law. This Subsidiary Guarantee shall be governed by and construed in accordance with the law of the State of New York.

This Subsidiary Guarantee shall be governed by and construed in accordance with the laws of the State of New York, without regard to principles of conflicts of laws.

Subject to the next following paragraph, each Additional Subsidiary Guarantor hereby certifies and warrants that all acts, conditions and things required to be done and performed and to have happened precedent to the creation and issuance of this Subsidiary Guarantee and to constitute the same valid obligation of each Additional Subsidiary Guarantor have been done and performed and have happened in due compliance with all applicable laws.

(Remainder of page intentionally left blank.)

C-3

This Subsidiary Guarantee shall not be valid or become obligatory for any purpose until the certificate of authentication on the Note upon which this Subsidiary Guarantee is endorsed has been signed by the Trustee under the Indenture referred to in this Note.

Dated: _______________, 2001               [ADDITIONAL SUBSIDIARY GUARANTOR(S)]


Attest:
                                           By:
                                              ----------------------------------
                                           Name:
----------------------------               Title:
Name:

Title:


Exhibit 4.5

FIFTH SUPPLEMENTAL INDENTURE

FIFTH SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of June 27, 2001 between QUEST DIAGNOSTICS INCORPORATED, a Delaware corporation (the "Company"), THE BANK OF NEW YORK, a New York banking corporation, as Trustee (the "Trustee"), and the Subsidiary Guarantors parties hereto.

W I T N E S S E T H :

WHEREAS, in accordance with Section 902 of the Indenture relating to the 10 3/4% Senior Subordinated Notes due 2006 of the Company (the "Securities"), dated as of December 16, 1996 (the "Indenture"), the Trustee, the Company, and the Holders of at least a majority in principal amount at maturity of the Securities outstanding as of the date hereof desire to amend certain terms of the Indenture as described below;

WHEREAS, the Company is undertaking to amend the Indenture as reflected in this Supplemental Indenture providing for the elimination of certain of the covenants and agreements contained in the Indenture, and to purchase all of the Securities tendered to the Company pursuant to the Offer to Purchase and Consent Solicitation Statement and accompanying Consent and Letter of Transmittal dated as of May 24, 2001 and any amendments, modifications or supplements thereto (the "Offer and Consent Solicitation");

WHEREAS, all things necessary to make this Supplemental Indenture a valid supplement to the Indenture according to its terms and the terms of the Indenture have been done;

NOW, THEREFORE, the parties hereto agree as follows:

SECTION 1. Certain Terms Defined in the Indenture. All capitalized terms used herein without definition herein shall have the meanings ascribed thereto in the Indenture.

SECTION 2. Amendments to the Indenture. Subject to Section 3 hereof, the Indenture is hereby amended as follows:

(a) The application of the provisions of Article 10 of the Indenture are hereby waived to the extent that such provisions might otherwise interfere with the ability of the Company to enter into agreements contemplated by, and to consummate, the Offer and Consent Solicitation.

(b) Effective at the time of the Company's payment, or deposit with The Bank of New York, as Depositary for the Offer and Consent Solicitation, of an amount of money sufficient to pay for all Securities validly tendered and accepted pursuant to the Offer and Consent Solicitation and to make all Consent Payments required under the Offer and Consent Solicitation:

(i) Sections 1008, 1009, 1010, 1011, 1012, 1013, 1015, 1016 and 1018 are hereby amended by deleting all such Sections in their entirety and all references thereto


in their entirety (including, without limitation, references to the covenants which are being deleted hereby in the Events of Default contained in Section 501(4) of the Indenture);

(ii) Clauses (iii), (iv) and (v) of Section 801 are hereby amended by deleting all such clauses in their entirety and all references thereto in their entirety and all references to
Section 801 in the Indenture shall mean Section 801 as amended hereby;

(iii) Section 501 is hereby amended by deleting clauses (5) and (6) thereof in their entirety and all references thereto in their entirety; and

(iv) Section 1019 is hereby amended by deleting such Section in its entirety and replacing it with the following and all references to Section 1019 in the Indenture shall mean Section 1019 as amended hereby:

"SECTION 1019. Unrestricted Subsidiaries. The Company may at any time designate any Person that after the date of this Indenture becomes a Subsidiary of the Company as an "Unrestricted Subsidiary", whereupon (and until such Person ceases to be an Unrestricted Subsidiary) such Person and each other Person that is then or thereafter becomes a Subsidiary of such Person will be deemed to be an Unrestricted Subsidiary. In addition, the Company may at any time terminate the status of any Subsidiary of the Company as an Unrestricted Subsidiary, whereupon such Subsidiary and each other Subsidiary of the Company (if any) of which such Subsidiary is a Subsidiary will cease to be an Unrestricted Subsidiary.

Notwithstanding the foregoing, no change in the status of a Subsidiary of the Company from a Restricted Subsidiary to an Unrestricted Subsidiary or an Unrestricted Subsidiary to a Restricted Subsidiary (other than the change in status of a Restricted Subsidiary holding only Non-Core Assets to an Unrestricted Subsidiary) will be effective, unless such change would not otherwise result (after the giving of notice or the lapse of time, or both) in an Event of Default."

(v) All definitions set forth in Section 101 of the Indenture that relate to defined terms used solely in sections deleted by this Supplemental Indenture are deleted in their entirety hereby.

SECTION 3. Governing Law. The laws of the State of New York shall govern this Supplemental Indenture but without giving effect to applicable principles of conflicts of law.

SECTION 4. Counterparts. This Supplemental Indenture may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument


SECTION 5. Ratification. Except as expressly amended hereby, each provision of the Indenture shall remain in full force and effect and, as amended hereby, the Indenture is in all respects agreed to, ratified and confirmed by each of the Company and the Trustee.

SECTION 6. Effectiveness. The provisions of this Supplemental Indenture shall become operative only on the Acceptance Date, as defined in the Offer and Consent Solicitation.

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date first above written.

QUEST DIAGNOSTICS INCORPORATED

By:  /s/
   --------------------------------------
         Title:

THE BANK OF NEW YORK,
as Trustee

By:  /s/ Marie E. Trimboli
   --------------------------------------
         Title: Assistant Vice President


QUEST DIAGNOSTICS
INVESTMENTS INCORPORATED

By /s/ Peter C. Fulweiler
   --------------------------------------
Title: President

By
Title:

QUEST DIAGNOSTICS
FINANCE INCORPORATED

By /s/ Peter C. Fulweiler
   --------------------------------------
Title: President

By
Title:

QUEST DIAGNOSTICS INCORPORATED (CT)
QUEST DIAGNOSTICS INCORPORATED (MA)
QUEST DIAGNOSTICS INCORPORATED (MD)
QUEST DIAGNOSTICS INCORPORATED (MI)
QUEST DIAGNOSTICS LABORATORIES
OF PENNSYLVANIA INC.
QUEST MRL INC.
QUEST DIAGNOSTICS INCORPORATED (CA)
LABORATORY HOLDINGS INC.
DIAGNOSTIC REFERENCE SERVICES, INC.
DPD HOLDINGS INC.
METWEST INC.
NICHOLS INSTITUTE DIAGNOSTICS
QUEST HOLDINGS INCORPORATED (DE)
QUEST HOLDINGS INCORPORATED (MD)
QUEST HOLDINGS INCORPORATED (MI)
QUEST DIAGNOSTICS INCORPORATED (OH)

By: /s/ Joseph P. Manory
   --------------------------------------
Title: Vice President & Treasurer


PATHOLOGY BUILDING PARTNERSHIP

By Quest Diagnostics Incorporated (MD)
As General Partner

By: /s/ Joseph P. Manory
   --------------------------------------
Title: Vice President & Treasurer

QUEST DIAGNOSTICS LLC (IL)

By: /s/ Joseph P. Manory
   --------------------------------------
Title: Vice President & Treasurer

QUEST DIAGNOSTICS CLINICAL
LABORATORIES, INC. (DE)

By: /s/ Joseph P. Manory
   --------------------------------------
Title: Vice President & Treasurer

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED (DE)

By: /s/ Joseph P. Manory
   --------------------------------------
Title: Vice President & Treasurer


Exhibit 10.1

CREDIT AGREEMENT
among
QUEST DIAGNOSTICS INCORPORATED

as Borrower,
AND
CERTAIN SUBSIDIARIES OF THE BORROWER

as Guarantors,
AND
THE LENDERS IDENTIFIED HEREIN,
AND
BANK OF AMERICA, N.A.,

as Administrative Agent
AND
UBS AG, STAMFORD BRANCH and MERRILL LYNCH CAPITAL CORPORATION

as Co-Syndication Agents
AND
CREDIT SUISSE FIRST BOSTON and THE BANK OF NEW YORK

As Co-Documentation Agents
AND
WACHOVIA BANK, N.A.

As Managing Agent
DATED AS OF JUNE 27, 2001

BANC OF AMERICA SECURITIES LLC

AND

UBS WARBURG LLC

as Joint Book Managers and Co-Lead Arrangers


                               TABLE OF CONTENTS

SECTION 1  DEFINITIONS AND ACCOUNTING TERMS.......................................................................1
         1.1    Definitions.......................................................................................1
         1.2    Computation of Time Periods and Other Definitional Provisions....................................25
         1.3    Accounting Terms/Calculation of Financial Covenants..............................................25
         1.4    Time.............................................................................................26

SECTION 2  CREDIT FACILITIES.....................................................................................26
         2.1    Revolving Loans..................................................................................26
         2.2    Letter of Credit Subfacility.....................................................................28
         2.3    Swing Line Loans Subfacility.....................................................................33
         2.4    Competitive Bid Loans Subfacility................................................................35
         2.5    Term Loans.......................................................................................37
         2.6    Continuations and Conversions....................................................................38
         2.7    Minimum Amounts..................................................................................39

SECTION 3  GENERAL PROVISIONS APPLICABLE TO LOANS AND LETTERS OF CREDIT..........................................39
         3.1    Interest.........................................................................................39
         3.2    Place and Manner of Payments.....................................................................40
         3.3    Prepayments......................................................................................40
         3.4    Fees.............................................................................................41
         3.5    Payment in full at Maturity......................................................................42
         3.6    Computations of Interest and Fees................................................................42
         3.7    Pro Rata Treatment...............................................................................43
         3.8    Sharing of Payments..............................................................................44
         3.9    Capital Adequacy/Regulation D....................................................................45
         3.10   Inability To Determine Interest Rate.............................................................46
         3.11   Illegality.......................................................................................46
         3.12   Requirements of Law..............................................................................47
         3.13   Taxes............................................................................................47
         3.14   Compensation.....................................................................................50
         3.15   Determination and Survival of Provisions.........................................................51
         3.16   Notification by Lenders..........................................................................51
         3.17   Mitigation; Mandatory Assignment.................................................................51

SECTION 4  GUARANTY..............................................................................................52
         4.1    Guaranty of Payment..............................................................................52
         4.2    Obligations Unconditional........................................................................52
         4.3    Modifications....................................................................................53
         4.4    Waiver of Rights.................................................................................53
         4.5    Reinstatement....................................................................................53
         4.6    Remedies.........................................................................................54
         4.7    Limitation of Guaranty...........................................................................54

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         4.8    Rights of Contribution...........................................................................54
         4.9    Release of Guarantors............................................................................54

SECTION 5  CONDITIONS PRECEDENT..................................................................................55
         5.1    Closing Conditions...............................................................................55
         5.2    Conditions to All Extensions of Credit...........................................................57

SECTION 6  REPRESENTATIONS AND WARRANTIES........................................................................58
         6.1    Organization and Good Standing...................................................................58
         6.2    Due Authorization................................................................................58
         6.3    Enforceable Obligations..........................................................................58
         6.4    No Conflicts.....................................................................................58
         6.5    Consents.........................................................................................59
         6.6    Financial Condition..............................................................................59
         6.7    No Material Change...............................................................................59
         6.8    Disclosure.......................................................................................59
         6.9    No Default.......................................................................................60
         6.10   Litigation.......................................................................................60
         6.11   Taxes............................................................................................60
         6.12   Compliance with Law..............................................................................60
         6.13   Licensing and Accreditation......................................................................61
         6.14   Title to Properties, Liens.......................................................................61
         6.15   Insurance........................................................................................61
         6.16   Use of Proceeds..................................................................................61
         6.17   Government Regulation............................................................................61
         6.18   ERISA............................................................................................62
         6.19   Environmental Matters............................................................................63
         6.20   Intellectual Property............................................................................64
         6.21   Subsidiaries.....................................................................................64
         6.22   Solvency.........................................................................................65

SECTION 7  AFFIRMATIVE COVENANTS.................................................................................65
         7.1    Information Covenants............................................................................65
         7.2    Financial Covenants..............................................................................68
         7.3    Preservation of Existence and Franchises.........................................................68
         7.4    Books and Records................................................................................68
         7.5    Compliance with Law..............................................................................68
         7.6    Payment of Taxes and Other Indebtedness..........................................................69
         7.7    Insurance........................................................................................69
         7.8    Maintenance of Property..........................................................................69
         7.9    Performance of Obligations.......................................................................70
         7.10   Use of Proceeds..................................................................................70
         7.11   Audits/Inspections...............................................................................70
         7.12   Additional Credit Parties........................................................................70
         7.13   Credit Party Revenues............................................................................71
         7.14   Compliance Program...............................................................................71

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SECTION 8  NEGATIVE COVENANTS....................................................................................71
         8.1    Indebtedness.....................................................................................72
         8.2    Liens............................................................................................72
         8.3    Nature of Business...............................................................................73
         8.4    Consolidation and Merger.........................................................................73
         8.5    Sale or Lease of Assets..........................................................................73
         8.6    Investments......................................................................................74
         8.7    Transactions with Affiliates.....................................................................74
         8.8    Fiscal Year; Accounting; Organizational Documents................................................74
         8.9    Stock Repurchases................................................................................75
         8.10   Sale/Leasebacks..................................................................................75

SECTION 9  EVENTS OF DEFAULT.....................................................................................76
         9.1    Events of Default................................................................................76
         9.2    Acceleration; Remedies...........................................................................78
         9.3    Allocation of Payments After Event of Default....................................................79

SECTION 10  AGENCY PROVISIONS....................................................................................80
         10.1   Appointment......................................................................................80
         10.2   Delegation of Duties.............................................................................81
         10.3   Exculpatory Provisions...........................................................................81
         10.4   Reliance on Communications.......................................................................82
         10.5   Notice of Default................................................................................82
         10.6   Non-Reliance on Administrative Agent and Other Lenders...........................................83
         10.7   Indemnification..................................................................................83
         10.8   Administrative Agent in Its Individual Capacity..................................................84
         10.9   Successor Agent..................................................................................84

SECTION 11  MISCELLANEOUS........................................................................................85
         11.1   Notices..........................................................................................85
         11.2   Right of Set-Off.................................................................................85
         11.3   Benefit of Agreement.............................................................................86
         11.4   No Waiver; Remedies Cumulative...................................................................89
         11.5   Payment of Expenses; Indemnification.............................................................89
         11.6   Amendments, Waivers and Consents.................................................................90
         11.7   Counterparts/Telecopy............................................................................91
         11.8   Headings.........................................................................................91
         11.9   Defaulting Lender................................................................................91
         11.10  Survival of Indemnification......................................................................91
         11.11  Governing Law; Venue; Jurisdiction...............................................................91
         11.12  Waiver of Jury Trial; Waiver of Consequential Damages............................................92
         11.13  Severability.....................................................................................92
         11.14  Further Assurances...............................................................................92
         11.15  Confidentiality..................................................................................92
         11.16  Entirety.........................................................................................93
         11.17  Binding Effect; Continuing Agreement.............................................................93

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SCHEDULES

Schedule 1.1(a)   Commitment Percentages/Lending Offices
Schedule 2.2(c)   Existing Letters of Credit
Schedule 6.7      Material Changes
Schedule 6.10     Litigation
Schedule 6.21     Subsidiaries
Schedule 8.1      Indebtedness
Schedule 8.2      Liens
Schedule 8.6      Investments
Schedule 8.7      Affiliate Transactions
Schedule 11.1     Notices

EXHIBITS

Exhibit 2.1(b)    Form of Notice of Borrowing
Exhibit 2.1(e)    Form of Revolving Note
Exhibit 2.3(b)    Form of Swing Line Loan Request
Exhibit 2.3(d)    Form of Swing Line Note
Exhibit 2.4(b)    Form of Competitive Bid Request
Exhibit 2.4(g)    Form of Competitive Bid Loan Note
Exhibit 2.5(d)    Form of Term Note
Exhibit 2.6       Form of Notice of Continuation/Conversion
Exhibit 7.1(c)    Form of Officer's Certificate
Exhibit 7.12      Form of Joinder Agreement
Exhibit 11.3(b)   Form of Assignment Agreement

iv

CREDIT AGREEMENT

THIS CREDIT AGREEMENT (this "Credit Agreement"), is entered into as of June 27, 2001 among QUEST DIAGNOSTICS INCORPORATED, a Delaware corporation (the "Borrower"), certain of the Subsidiaries of the Borrower (individually a "Guarantor" and collectively the "Guarantors"), the Lenders (as defined herein), and BANK OF AMERICA, N.A., as Administrative Agent for the Lenders and as Issuing Lender.

RECITALS

WHEREAS, the Borrower and the Guarantors have requested the Lenders to provide a senior credit facility to the Borrower in an aggregate principal amount of up to $500,000,000; and

WHEREAS, the Lenders party hereto have agreed to make the requested senior credit facility available to the Borrower on the terms and conditions hereinafter set forth.

NOW, THEREFORE, IN CONSIDERATION of the premises and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows:

SECTION 1

DEFINITIONS AND ACCOUNTING TERMS

1.1 Definitions.

As used herein, the following terms shall have the meanings herein specified unless the context otherwise requires. Defined terms herein shall include in the singular number the plural and in the plural the singular:

"Acquisition" means the acquisition by any Person of (a) more than 50% of the Capital Stock of another Person, (b) all or substantially all of the assets of another Person or (c) all or substantially all of a line of business of another Person, in each case whether or not involving a merger or consolidation with such other Person.

"Additional Credit Party" means each Person that becomes a Guarantor after the Closing Date, as provided in Section 7.12 or otherwise.

"Adjusted Eurodollar Rate" means the Eurodollar Rate plus the Applicable Percentage.

"Administrative Agent" means Bank of America, N.A. (or any successor thereto) or any successor administrative agent appointed pursuant to Section 10.9.


"Affiliate" means, with respect to any Person, any other Person directly or indirectly controlling (including but not limited to all directors and officers of such Person), controlled by or under direct or indirect common control with such Person. A Person shall be deemed to control a corporation if such Person possesses, directly or indirectly, the power (a) to vote 10% or more of the securities having ordinary voting power for the election of directors of such corporation or (b) to direct or cause direction of the management and policies of such corporation, whether through the ownership of voting securities, by contract or otherwise.

"Agency Services Address" means Bank of America, N.A., NC1-001-15-04, 101 North Tryon Street, Charlotte, North Carolina 28255, Attn: Agency Services, Attn: Credit Services, or such other address as may be identified by written notice from the Administrative Agent to the Borrower.

"Agent-Related Person" means the Administrative Agent (including any successor administrative agent), together with its Affiliates (including, in the case of Bank of America in its capacity as the Administrative Agent, BAS), and their respective officers, directors, employees, agents, counsel and attorneys-in-fact.

"Agents" means Bank of America N.A., in its capacity as Administrative Agent, UBS AG, Stamford Branch in its capacity as Co-Syndication Agent, Merrill Lynch in its capacity as Co-Syndication Agent, Credit Suisse First Boston in its capacity as Co-Documentation Agent, The Bank of New York in its capacity as Co-Documentation Agent, and Wachovia Bank, N.A. in its capacity as Managing Agent.

"Applicable Percentage" means the appropriate applicable percentages corresponding to the Debt Rating of the Borrower in effect from time to time as described below:

============================================================================================================
                                            Applicable         Applicable
                                          Percentage for     Percentage for     Applicable      Applicable
Pricing                                  Revolving Loans    Term Loans that   Percentage for    Percentage
 Level             Debt Rating               that are        are Eurodollar      Letter of         for
                                         Eurodollar Loans        Loans          Credit Fees    Facility Fee
------------------------------------------------------------------------------------------------------------
    I       (>)BBB+ from S&P/                     .72%              .875%             .72%        .1550%
             -
            (>)Baa1 from Moody's
             -
------------------------------------------------------------------------------------------------------------
    II      (>)BBB but (<)BBB+ from S&P/        .9375%            1.1875%           .9375%        .2500%
             -
            (>)Baa2 but (<)Baa1 from
             -
            Moody's
------------------------------------------------------------------------------------------------------------
   III      (>)BBB- but (<)BBB from S&P/         1.00%            1.3125%            1.00%        .3125%
             -
            (>)Baa3 but (<)Baa2 from
             -
            Moody's
------------------------------------------------------------------------------------------------------------
    IV      (>)BB+ but (<)BBB- from S&P/         1.10%            1.4375%            1.10%        .3375%
             -
            (>)Ba1 but (<)Baa3 from
             -
            Moody's
------------------------------------------------------------------------------------------------------------
    V       (<)BB+ or unrated by S&P/            1.25%            1.6875%            1.25%        .4375%
            (<)Ba1 or unrated by Moody's
============================================================================================================

The Applicable Percentage for Eurodollar Loans, the Letter of Credit Fees and the Facility Fees shall, in each case, be determined and adjusted on the date (each a "Calculation Date") one Business Day after the date on which the Borrower's Debt Rating is upgraded or downgraded in a manner which requires a change in the then applicable Pricing Level set forth above. If at any time there is a split in the Borrower's Debt Ratings between S&P and Moody's, the Applicable Percentages shall be determined by the higher of the two Debt Ratings (i.e. the lower pricing); provided that if the two Debt Ratings are more than one

2

level apart, the Applicable Percentage shall be based on the Debt Rating which is one level higher than the lower rating. Each Applicable Percentage shall be effective from one Calculation Date until the next Calculation Date. Any adjustment in the Applicable Percentage shall be applicable to all existing Eurodollar Loans and Letters of Credit as well as any new Eurodollar Loans made or Letters of Credit issued.

"Attorney Costs" means all reasonable fees and disbursements of any law firm or other external counsel and the reasonable allocated cost of internal legal services and all disbursements of internal counsel.

"Attributable Debt" means, with respect to a Sale and Leaseback Transaction, an amount equal to the lesser of : (a) the fair market value of the Principal Property (as determined in good faith by the Borrower's board of directors); and (b) the present value of the total net amount of rent payments to be made under the lease during its remaining term, discounted at the rate of interest set forth or implicit in the terms of the lease, compounded semi-annually.

"Authorized Officer" means any of the chief executive officer, president, chief financial officer, corporate controller, treasurer or assistant treasurer of the Borrower.

"Bank of America" means Bank of America, N.A. or any successor thereto.

"Bankruptcy Code" means the Bankruptcy Code in Title 11 of the United States Code, as amended, modified, succeeded or replaced from time to time.

"BAS" means Banc of America Securities LLC.

"Base Rate" means, for any day, the rate per annum equal to the greater of (a) the Federal Funds Rate in effect on such day plus 1/2 of 1% or (b) the Prime Rate in effect on such day. If for any reason the Administrative Agent shall have determined (which determination shall be conclusive absent manifest error) that it is unable after due inquiry to ascertain the Federal Funds Rate for any reason, including the inability or failure of the Administrative Agent to obtain sufficient quotations in accordance with the terms hereof, the Base Rate shall be determined without regard to clause (a) of the first sentence of this definition until the circumstances giving rise to such inability no longer exist. Any change in the Base Rate due to a change in the Prime Rate or the Federal Funds Rate shall be effective at the opening of business on the day specified in the public announcement of such change.

"Base Rate Loan" means any Revolving Loan or Term Loan bearing interest at a rate determined by reference to the Base Rate.

"Borrower" means Quest Diagnostics Incorporated, a Delaware corporation, together with any successors and permitted assigns.

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"Business Day" means any day other than a Saturday, a Sunday, a legal holiday or a day on which banking institutions are authorized or required by law or other governmental action to close in New York, New York or Charlotte, North Carolina; provided that in the case of Eurodollar Loans, such day is also a day on which dealings between banks are carried on in U.S. dollar deposits in the London interbank market.

"Calculation Date" has the meaning set forth in the definition of Applicable Percentage.

"CAP" means the College of American Pathologists.

"Capital Expenditures" means all expenditures of the Borrower and its Subsidiaries on a consolidated basis which, in accordance with GAAP, would be classified as capital expenditures, including, without limitation, Capital Leases which would be so classified in accordance with GAAP.

"Capital Lease" means, as applied to any Person, any lease of any Property (whether real, personal or mixed) by that Person as lessee which, in accordance with GAAP, is or should be accounted for as a capital lease on the balance sheet of that Person and the amount of such obligation shall be the capitalized amount thereof determined in accordance with GAAP.

"Capital Stock" means (a) in the case of a corporation, all classes of capital stock of such corporation, (b) in the case of a partnership, partnership interests (whether general or limited), (c) in the case of a limited liability company, membership interests and (d) any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person.

"Cash Equivalents" means (a) securities issued or directly and fully guaranteed or insured by the United States of America or any agency or instrumentality thereof (provided that the full faith and credit of the United States of America is pledged in support thereof) having maturities of not more than eighteen months from the date of acquisition, (b) Dollar denominated time and demand deposits, certificates of deposit and banker's acceptances of (i) any Lender,
(ii) any domestic commercial bank having capital and surplus in excess of $500,000,000 or (iii) any bank whose short-term commercial paper rating from S&P is at least A-1 or the equivalent thereof or from Moody's is at least P-1 or the equivalent thereof (any such bank being an "Approved Bank"), in each case with maturities of not more than 270 days from the date of acquisition, (c) commercial paper and variable or fixed rate notes issued by any Approved Bank (or by the parent company thereof) or any variable rate notes issued by, or guaranteed by, any domestic corporation rated A-1 (or the equivalent thereof) or better by S&P or P-1 (or the equivalent thereof) or better by Moody's and maturing within six months of the date of acquisition, (d) repurchase agreements with a bank or trust company (including any of the Lenders) or recognized securities dealer having capital and surplus in excess of $500,000,000 for direct obligations issued by or fully guaranteed by the United States of America in which the Borrower shall have a perfected first priority security interest (subject to no other Liens) and having, on the date of purchase thereof, a fair market

4

value of at least 100% of the amount of the repurchase obligations, (e) Investments in tax-exempt municipal bonds rated A (or the equivalent thereof) or better by S&P or MIG2 (or the equivalent thereof) or better by Moody's and (f) Investments, classified in accordance with GAAP as current assets, in money market investment programs registered under the Investment Company Act of 1940, as amended, which are administered by reputable financial institutions having capital of at least $500,000,000 and the portfolios of which are limited to Investments of the character described in the foregoing subdivisions (a) through (e).

"Cash Interest Expenses" means all Interest Expense actually paid in cash by the Borrower and its Subsidiaries.

"Cash Taxes" means the total amount of federal, state, foreign or other income or franchise taxes, paid in cash, of the Borrower and its Subsidiaries on a consolidated basis.

"CHAMPUS" means the United States Department of Defense Civilian Health and Medical Program of the United States or any successor thereto including, without limitation, TRICARE.

"Change of Control" means either of the following events:

(a) any "person" or "group" (within the meaning of
Section 13(d) or 14(d) of the Exchange Act) has become, directly or indirectly, the "beneficial owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), by way of merger, consolidation or otherwise of 35% or more of the Voting Stock of the Borrower on a fully-diluted basis, after giving effect to the conversion and exercise of all outstanding warrants, options and other securities of the Borrower convertible into or exercisable for Voting Stock of the Borrower (whether or not such securities are then currently convertible or exercisable); or

(b) during any period of twelve calendar months, individuals who at the beginning of such period constituted the board of directors of the Borrower together with any new members of such board of directors whose elections by such board or board of directors or whose nomination for election by the stockholders of the Borrower was approved by a vote of a majority of the members of such board of directors then still in office who either were directors at the beginning of such period or whose election or nomination for election was previously so approved cease for any reason to constitute a majority of the directors of the Borrower then in office.

"CLIA" means the Clinical Laboratory Improvement Act as set forth at 42 U.S.C. 263a and the regulations promulgated thereunder, as amended.

"Closing Date" means the date hereof.

5

"Code" means the Internal Revenue Code of 1986 and the rules and regulations promulgated thereunder, as amended, modified, succeeded or replaced from time to time.

"Commitments" means (a) the commitment of each Lender with respect to the Revolving Committed Amount and the Term Loan Committed Amount, (b) the commitment of the Issuing Lender with respect to the LOC Commitment and (c) the commitment of the Swing Line Lender with respect to the Swing Line Committed Amount.

"Competitive Bid" means an offer by a Lender to make a Competitive Bid Loan pursuant to the terms of Section 2.4.

"Competitive Bid Loan" means a loan made by a Lender in its discretion pursuant to the provisions of Section 2.4.

"Competitive Bid Loan Notes" means the promissory notes of the Borrower in favor of each Lender evidencing the Competitive Bid Loans provided pursuant to Section 2.4, individually or collectively, as appropriate, as such promissory notes may be amended, modified, supplemented or replaced from time to time and as evidenced in the form of Exhibit 2.4(g).

"Competitive Bid Fee" means $1,000 for each Competitive Bid Request.

"Competitive Bid Rate" means, as to any Competitive Bid made by a Lender in accordance with the provisions of Section 2.4, the rate of interest offered by the Lender making the Competitive Bid.

"Competitive Bid Request" means a request by the Borrower for Competitive Bids in the form of Exhibit 2.4(b).

"Credit Documents" means this Credit Agreement, the Notes, any Joinder Agreement, the LOC Documents, any Notice of Borrowing, any Competitive Bid Request and any Swing Line Loan Request.

"Credit Exposure" has the meaning set forth in the definition of Required Lenders in this Section 1.1.

"Credit Parties" means the Borrower and the Guarantors and "Credit Party" means any one of them.

"Credit Party Obligations" means, without duplication, all of the obligations of the Credit Parties to the Lenders (including the Issuing Lender and the Swing Line Lender) and the Administrative Agent, whenever arising, under this Credit Agreement, the Notes, or any of the other Credit Documents.

"Debt Rating" means the long-term senior unsecured, non-credit enhanced debt rating of the Borrower from S&P and Moody's.

6

"Default" means any event, act or condition which with notice or lapse of time, or both, would constitute an Event of Default.

"Defaulting Lender" means, at any time, any Lender that, (a) has failed to make a Loan or purchase a Participation Interest required pursuant to the terms of this Credit Agreement (but only for so long as such Loan is not made or such Participation Interest is not purchased),
(b) has failed to pay to the Administrative Agent or any Lender an amount owed by such Lender pursuant to the terms of this Credit Agreement (but only for so long as such amount has not been repaid) or
(c) has been deemed insolvent or has become subject to a bankruptcy or insolvency proceeding or to a receiver, trustee or similar official.

"Dividends" means any payment of dividends or any other distribution upon any shares of any class of Capital Stock of the Borrower.

"Dollars" and "$" means dollars in lawful currency of the United States of America.

"Domestic Subsidiary" means each direct and indirect Subsidiary of the Borrower that is domiciled or organized under the laws of any State of the United States or the District of Columbia.

"EBITDA" means, for any period, with respect to the Borrower and its Subsidiaries on a consolidated basis, (a) Net Income for such period (excluding the effect of any extraordinary or other non-recurring gains and losses (including any gain or loss from the sale of Property)) plus (b) an amount which, in the determination of Net Income for such period, has been deducted for (i) Interest Expense for such period, (ii) total Federal, state, foreign or other income or franchise taxes for such period, (iii) all depreciation and amortization for such period, (iv) other items of expense during such period that do not involve a cash payment at any time (other than the provision for bad debt in connection with uncollectible accounts receivable), (v) cash charges during such period for which the Borrower and its Subsidiaries are reimbursed by a third party during such period and (vi) special or restructuring items during any such period included in Net Income that do not involve a cash payment during such period (collectively, "Non-Cash Items") minus (c) any actual cash payments during the applicable period related to Non-Cash Items expensed or reserved under clause (v) above during an applicable period beginning after March 31, 2001 plus (d) Tender Costs during such period.

"Effective Date" means the date on which the conditions set forth in Section 5.1 shall have been fulfilled (or waived in the sole discretion of the Lenders) and on which the initial Loans shall have been made and/or the initial Letters of Credit shall have been issued.

"Eligible Assets" means (a) MedPlus and its Subsidiaries and
(b) any assets or any business (or any substantial part thereof) used or useful in the same or a similar line of business as the Borrower and its Subsidiaries are engaged on the Closing Date or other healthcare-related businesses.

7

"Eligible Assignee" means (a) a Lender; (b) an Affiliate of a Lender; and (c) any other Person approved by the Administrative Agent, the Issuing Lender and the Borrower (such approval not to be unreasonably withheld or delayed); provided that (i) the Borrower's consent is not required during the existence and continuation of a Default or an Event of Default, (ii) approval by the Borrower shall be deemed given if no objection is received by the assigning Lender and the Administrative Agent from the Borrower within five Business Days after notice of such proposed assignment has been delivered to the Borrower; (iii) neither the Borrower nor an Affiliate of the Borrower shall qualify as an Eligible Assignee; and (iv) no competitor of the Borrower shall qualify as an Eligible Assignee.

"Environmental Laws" means any current or future legally enforceable requirement of any Governmental Authority pertaining to (a) the protection of the indoor or outdoor environment, (b) the conservation, management, or use of natural resources and wildlife, (c) the protection or use of surface water and groundwater or (d) the management, manufacture, possession, presence, use, generation, transportation, treatment, storage, disposal, release, threatened release, abatement, removal, remediation or handling of, or exposure to, any hazardous or toxic substance or material or (e) pollution (including any release to land surface water and groundwater) and includes, without limitation, the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended by the Superfund Amendments and Reauthorization Act of 1986, 42 USC 9601 et seq., Solid Waste Disposal Act, as amended by the Resource Conservation and Recovery Act of 1976 and Hazardous and Solid Waste Amendments of 1984, 42 USC 6901 et seq., Federal Water Pollution Control Act, as amended by the Clean Water Act of 1977, 33 USC 1251 et seq., Clean Air Act of 1966, as amended, 42 USC 7401 et seq., Toxic Substances Control Act of 1976, 15 USC 2601 et seq., Hazardous Materials Transportation Act, 49 USC App. 1801 et seq., Occupational Safety and Health Act of 1970, as amended, 29 USC 651 et seq., Oil Pollution Act of 1990, 33 USC 2701 et seq., Emergency Planning and Community Right-to-Know Act of 1986, 42 USC 11001 et seq., National Environmental Policy Act of 1969, 42 USC 4321 et seq., Safe Drinking Water Act of 1974, as amended, 42 USC 300(f) et seq., any analogous implementing or successor law, and any amendment, rule, regulation, order, or directive issued thereunder.

"ERISA" means the Employee Retirement Income Security Act of 1974, as amended, and any successor statute thereto, as interpreted by the rules and regulations thereunder, all as the same may be in effect from time to time. References to sections of ERISA shall be construed also to refer to any successor sections.

"ERISA Affiliate" means an entity, whether or not incorporated, which is treated as a single employer with the Borrower or any Subsidiary of the Borrower under Sections 414(b) or (c) of the Code and solely for purposes of Section 412 of the Code under Section 414(m) of the Code.

"ERISA Event" means (a) with respect to any Single Employer or Multiple Employer Plan, the occurrence of a Reportable Event or the substantial cessation of operations (within the meaning of Section 4062(e) of ERISA); (b) the withdrawal of the

8

Borrower, any Subsidiary of the Borrower or any ERISA Affiliate from a Multiple Employer Plan during a plan year in which it was a substantial employer (as such term is defined in Section 4001(a)(2) of ERISA), or the termination of a Multiple Employer Plan; (c) the distribution of a notice of intent to terminate or the actual termination of a Plan pursuant to Section 4041(a)(2) or 4041A of ERISA; (d) the institution of proceedings to terminate or the actual termination of any Plan by the PBGC under Section 4042 of ERISA; (e) any event or condition which might constitute grounds under Section 4042 of ERISA for the termination of, or the appointment of a trustee to administer, any Plan; (f) the complete or partial withdrawal of the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate from a Multiemployer Plan or notification that a Multiemployer Plan is in reorganization;
(g) the conditions for imposition of a lien under Section 302(f) of ERISA exist with respect to any Plan; or (h) the adoption of an amendment to any Plan requiring the provision of security to such Plan pursuant to Section 307 of ERISA.

"Eurodollar Loan" means a Loan bearing interest based at a rate determined by reference to the Eurodollar Rate.

"Eurodollar Rate" means, for the Interest Period for each Eurodollar Loan comprising part of the same borrowing (including conversions, extensions and renewals), a per annum interest rate equal to the London Interbank Offered Rate.

"Eurodollar Reserve Percentage" means, with respect to each Lender, the percentage (expressed as a decimal) applicable to such Lender which is in effect from time to time under Regulation D as the reserve requirement (including, without limitation, any basic, supplemental, emergency, special, or marginal reserves) applicable with respect to its Eurocurrency liabilities, as that term is defined in Regulation D (or against any other category of liabilities that includes deposits by reference to which the interest rate of Eurodollar Loans is determined). Eurodollar Loans made by a Lender shall be deemed to constitute Eurocurrency liabilities and as such shall be deemed subject to reserve requirements, if applicable, without benefits of credits for proration, exceptions or offsets that may be available from time to time to such Lender.

"Event of Default" means any of the events or circumstances specified in Section 9.1.

"Exchange Act" means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder, as amended, modified, succeeded or replaced from time to time.

"Existing Credit Agreement" means that certain Credit Agreement, dated as of August 16, 1999, among the Borrower, as borrower, the guarantors party thereto, the lenders signatories thereto, Merrill Lynch & Co. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arranger and syndication agent, BAS as joint lead arranger, Bank of America, as administrative agent, Wachovia Bank, N.A., as co-documentation agent, and The Bank of New York, as co-documentation agent as amended or modified from time to time.

9

"Existing Letters of Credit" means the letters of credit described on Schedule 2.2(c).

"Existing Senior Subordinated Notes" means those certain 10 3/4% senior subordinated notes due 2006 issued by the Borrower.

"Extension of Credit" means, as to any Lender, the making of a Loan by such Lender (or a participation therein by a Lender) or the issuance of, or participation in, a Letter of Credit by such Lender.

"Facility Fees" means the fees payable to the Lenders pursuant to Section 3.4(a).

"Federal Funds Rate" means for any day the rate per annum equal to the weighted average of the rates on overnight Federal funds transactions with members of the Federal Reserve System arranged by Federal funds brokers on such day, as published by the Federal Reserve Bank of New York on the Business Day next succeeding such day; provided that (a) if such day is not a Business Day, the Federal Funds Rate for such day shall be such rate on such transactions on the next preceding Business Day and (b) if no such rate is so published on such next preceding Business Day, the Federal Funds Rate for such day shall be the average rate quoted to the Administrative Agent on such day on such transactions from three Federal Funds brokers of recognized standing selected by it.

"Fee Letters" means (a) that certain letter agreement dated as of May 21, 2001 among the Borrower, BAS, UBS Warburg LLC and the Agents and (b) that certain letter agreement, dated as of May 21, 2001, among the Borrower, BAS, UBS Warburg LLC, UBS AG, Stamford Branch and Bank of America.

"Fixed Charge Coverage Ratio" means, as of the end of each fiscal quarter of the Credit Parties for the twelve month period ending on such date, with respect to the Borrower and its Subsidiaries on a consolidated basis, the ratio of (a) the sum of (i) EBITDA for such period minus (ii) Capital Expenditures for such period minus (iii) Cash Taxes for such period to (b) the sum of (i) Cash Interest Expense for such period plus (ii) Scheduled Funded Debt Payments, after giving effect to any reductions arising from voluntary prepayments previously made, for such period, plus (iii) cash Dividends for such period.

"Foreign Subsidiary" means any Subsidiary of the Borrower that is not a Domestic Subsidiary.

"Funded Debt" means, without duplication, the sum of (a) all Indebtedness of the Borrower and its Subsidiaries for borrowed money,
(b) all purchase money Indebtedness of the Borrower and its Subsidiaries, (c) the principal portion of all obligations of the Borrower and its Subsidiaries under Capital Leases, (d) all drawn but unreimbursed amounts under all letters of credit (other than letters of credit supporting trade payables in the ordinary course of business) issued for the account of the Borrower or any of its Subsidiaries, (e) all Funded Debt of another Person secured by a Lien on any Property of the Borrower and its

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Subsidiaries whether or not such Funded Debt has been assumed by a Borrower or any of its Subsidiaries, (f) all Funded Debt of any partnership or unincorporated joint venture to the extent the Borrower or one of its Subsidiaries is legally obligated with respect thereto and (g) the amount of principal attributable under any outstanding Synthetic Lease. It is understood and agreed that Indebtedness incurred pursuant to Hedging Agreements is not Funded Debt.

"GAAP" means generally accepted accounting principles in the United States applied on a consistent basis and subject to Section 1.3.

"Governmental Authority" means any Federal, state, local, provincial or foreign court or governmental agency, authority, instrumentality or regulatory body.

"Guarantor" means each of the Material Domestic Subsidiaries of the Borrower, any other Subsidiary of the Borrower that guaranties the Senior Unsecured Notes and each Additional Credit Party, together with their successors and assigns.

"Guaranty" means the guaranty of the Credit Party Obligations provided by the Guarantors pursuant to Section 4.

"Guaranty Obligations" means, with respect to any Person, without duplication, any obligations (other than endorsements in the ordinary course of business of negotiable instruments for deposit or collection) guaranteeing any Indebtedness of any other Person in any manner, whether direct or indirect, and including without limitation any obligation, whether or not contingent, (a) to purchase any such Indebtedness or other obligation or any Property constituting security therefor, (b) to advance or provide funds or other support for the payment or purchase of such Indebtedness or obligation or to maintain working capital, solvency or other balance sheet condition of such other Person (including, without limitation, maintenance agreements, comfort letters, take or pay arrangements, put agreements or similar agreements or arrangements) for the benefit of the holder of Indebtedness of such other Person, (c) to lease or purchase Property, securities or services primarily for the purpose of assuring the owner of such Indebtedness or (d) to otherwise assure or hold harmless the owner of such Indebtedness or obligation against loss in respect thereof. The amount of any Guaranty Obligation hereunder shall (subject to any limitations set forth therein) be deemed to be an amount equal to the outstanding principal amount (or maximum principal amount, if larger) of the Indebtedness in respect of which such Guaranty Obligation is made.

"Hazardous Materials" means any substance, material or waste defined in or regulated under any Environmental Laws.

"HCFA" means the United States Health Care Financing Administration and any successor thereto.

"Hedging Agreements" means, collectively, interest rate protection agreements, foreign currency exchange agreements, commodity purchase or option agreements or other

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interest or exchange rate or commodity price hedging agreements, in each case, entered into or purchased by a Credit Party.

"Indebtedness" of any Person means, without duplication, (a) all obligations of such Person for borrowed money, (b) all obligations of such Person evidenced by bonds, debentures, notes or similar instruments, or upon which interest payments are customarily made, (c) all obligations of such Person under conditional sale or other title retention agreements relating to Property purchased by such Person to the extent of the value of such Property (other than customary reservations or retentions of title under agreements with suppliers entered into in the ordinary course of business), (d) all obligations, other than intercompany items, of such Person issued or assumed as the deferred purchase price of property or services purchased by such Person which would appear as liabilities on a balance sheet of such Person, (e) all Indebtedness of others secured by (or for which the holder of such Indebtedness has an existing right, contingent or otherwise, to be secured by) any Lien on, or payable out of the proceeds of production from, property owned or acquired by such Person, whether or not the obligations secured thereby have been assumed, (f) all Guaranty Obligations of such Person, (g) the principal portion of all obligations of such Person under (i) Capital Leases and (ii) any synthetic lease, tax retention operating lease, off-balance sheet loan or similar off-balance sheet financing product of such Person where such transaction is considered borrowed money indebtedness for tax purposes but is classified as an operating lease in accordance with GAAP, (h) all obligations of such Person to repurchase any securities which repurchase obligation is related to the issuance thereof, including, without limitation, obligations commonly known as residual equity appreciation potential shares, (i) all net obligations of such Person in respect of Hedging Agreements, (j) the maximum amount of all performance and standby letters of credit issued or bankers' acceptances facilities created for the account of such Person and, without duplication, all drafts drawn thereunder (to the extent unreimbursed), and (k) the aggregate amount of uncollected accounts receivable of such Person subject at such time to a sale of receivables (or similar transaction) regardless of whether such transaction is effected without recourse to such Person or in a manner that would not be reflected on the balance sheet of such Person in accordance with GAAP. The Indebtedness of any Person shall include the Indebtedness of any partnership or unincorporated joint venture in which such Person is legally obligated.

"Indemnified Liabilities" has the meaning set forth in Section 11.5.

"Intellectual Property" has the meaning set forth in Section 6.20.

"Interest Expense" means, for any period, with respect to the Borrower and its Subsidiaries on a consolidated basis, all interest expense, including, without duplication, the interest component under Capital Leases, as determined in accordance with GAAP.

"Interest Payment Date" means (a) as to Base Rate Loans and Swing Line Loans, the last day of each calendar quarter and the Maturity Date, (b) as to Eurodollar Loans, the last day of each applicable Interest Period and the Maturity Date and in addition, where the applicable Interest Period for a Eurodollar Loan is greater than three months, then also the date three months from the beginning of the Interest Period and each three months thereafter

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and (c) as to Competitive Bid Loans, on the last day of the Interest Period for each Competitive Bid Loan and on the Maturity Date. If an Interest Payment Date falls on a date which is not a Business Day, such Interest Payment Date shall be deemed to be the next succeeding Business Day, except that in the case of Eurodollar Loans where the next succeeding Business Day falls in the next succeeding calendar month, then on the next preceding Business Day.

"Interest Period" means (a) as to Eurodollar Loans, a period of one, two, three or six months' duration, as the Borrower may elect, commencing, in each case, on the date of the borrowing (including continuations and conversions thereof) and (b) as to Competitive Bid Loans, a period beginning on the date the Competitive Bid Loan is made and ending on the date specified in the respective Competitive Bid whereby the offer to make the Competitive Loan was extended, which shall not be less than 14 days nor more than 180 days duration; provided, however, (i) if any Interest Period would end on a day which is not a Business Day, such Interest Period shall be extended to the next succeeding Business Day (except that where the next succeeding Business Day falls in the next succeeding calendar month, then on the next preceding Business Day), (ii) no Interest Period shall extend beyond the Maturity Date and (iii) where an Interest Period begins on a day for which there is no numerically corresponding day in the calendar month in which the Interest Period is to end, such Interest Period shall end on the last Business Day of such calendar month.

"Investment" in any Person means (a) the acquisition (whether for cash, property, services, assumption of Indebtedness, securities or otherwise) of assets, shares of Capital Stock, bonds, notes, debentures, partnership, joint ventures or other ownership interests or other securities of such other Person or (b) any deposit with, or advance, loan or other extension of credit to, such Person (other than deposits or advances made in connection with the purchase of equipment or other assets or services in the ordinary course of business) or (c) any other capital contribution to or investment in such Person, including, without limitation, any Guaranty Obligation (including any support for a letter of credit issued on behalf of such Person) incurred for the benefit of such Person.

"Issuing Lender" means Bank of America.

"Issuing Lender Fees" has the meaning set forth in Section 3.4(b)(ii).

"Joinder Agreement" means a Joinder Agreement substantially in the form of Exhibit 7.12.

"Lender" means any of the Persons identified as a "Lender" on the signature pages hereto, and any Eligible Assignee which may become a Lender by way of assignment in accordance with the terms hereof, together with their successors and permitted assigns.

"Lending Office" means, as to any Lender, the office or offices of such Lender described as such on Schedule 1.1(a), or such other office or offices as a Lender may from time notify to the Borrower and the Administrative Agent.

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"Letter of Credit" means any letter of credit issued for the account of the Borrower by the Issuing Lender pursuant to Section 2.2, as such letter of credit may be amended, modified, extended, renewed or replaced.

"Letter of Credit Fees" has the meaning set forth in Section 3.4(b)(i).

"Leverage Ratio" means, as of the last day of each fiscal quarter, the ratio of (a) (i) Funded Debt on such date less (ii) if no Loans, other than Term Loans, are outstanding on such date, the amount of Available Cash (as defined below) on such date to (b) EBITDA for the twelve month period ending on such date. For the purposes hereof, "Available Cash" means all cash and Cash Equivalents of the Borrower and its Subsidiaries located in the United States and reflected on its consolidated balance sheet in excess of $40,000,000.

"Lien" means any mortgage, pledge, hypothecation, assignment, deposit arrangement, security interest, encumbrance, lien (statutory or otherwise), preference, priority or charge of any kind, including, without limitation, any agreement to give any of the foregoing, any conditional sale or other title retention agreement, and any lease in the nature thereof (other than operating leases).

"Loan" or "Loans" means the Revolving Loans, the Term Loans, the Competitive Bid Loans and the Swing Line Loans (or any portion thereof), individually or collectively, as appropriate.

"LOC Commitment" means the commitment of the Issuing Lender to issue Letters of Credit for the account of the Borrower in an aggregate face amount outstanding (together with the amounts of any unreimbursed drawings thereon) at any time of up to the LOC Committed Amount.

"LOC Committed Amount" means ONE HUNDRED MILLION DOLLARS ($100,000,000).

"LOC Documents" means, with respect to any Letter of Credit, such Letter of Credit, any amendments thereto, any documents delivered in connection therewith, any application therefor, and any agreements, instruments, guarantees or other documents (whether general in application or applicable only to such Letter of Credit) governing or providing for (a) the rights and obligations of the parties concerned or at risk or (b) any collateral security for such obligations.

"LOC Obligations" means, at any time, the sum of (a) the maximum amount which is, or at any time thereafter may become, available to be drawn under Letters of Credit then outstanding, assuming compliance with all requirements for drawings referred to in such Letters of Credit plus (b) the aggregate amount of all drawings under Letters of Credit honored by the Issuing Lender but not theretofore reimbursed.

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"London Interbank Offered Rate" means, with respect to any Eurodollar Loan for the Interest Period applicable thereto, the rate of interest per annum appearing on Telerate Page 3750 (or any successor page) as the London interbank offered rate for deposits in Dollars at approximately 11:00 A.M. (London time) two Business Days prior to the first day of such Interest Period for a term comparable to such Interest Period; provided, however, if more than one rate is specified on Telerate Page 3750, the applicable rate shall be the arithmetic mean of all such rates. If, for any reason, such rate is not available, the term "London Interbank Offered Rate" shall mean, with respect to any Eurodollar Loan for the Interest Period applicable thereto, the rate of interest per annum appearing on Reuters Screen LIBO Page as the London interbank offered rate for deposits in Dollars at approximately 11:00
A.M. (London time) two Business Days prior to the first day of such Interest Period for a term comparable to such Interest Period; provided, however, if more than one rate is specified on Reuters Screen LIBO Page, the applicable rate shall be the arithmetic mean of all such rates.

"Mandatory Borrowing" has the meaning set forth in Section 2.2(e).

"Material Adverse Effect" means a material adverse effect on
(a) the business, operations or financial condition of the Borrower and its Subsidiaries taken as a whole, (b) the ability of a Credit Party to perform its obligations under this Credit Agreement or any of the other Credit Documents, or (c) the validity or enforceability of this Credit Agreement, any of the other Credit Documents, or the rights and remedies of the Lenders hereunder or thereunder taken as a whole.

"Material Domestic Subsidiary" means any wholly-owned Domestic Subsidiary of the Borrower that, directly or indirectly, (a) owns assets in excess of $20,000,000 or (b) has annual revenues, as of the most recently ended fiscal year of the Borrower, in excess of two percent (2%) of the total revenues of the Borrower and its Subsidiaries on a consolidated basis; provided that Quest Receivables shall not be deemed to be a Material Domestic Subsidiary.

"Maturity Date" means June 27, 2006.

"Medicaid" shall mean that entitlement program under Title XIX of the Social Security Act that provides federal grants to states for medical assistance based on specific eligibility criteria.

"Medicaid Provider Agreement" means an agreement entered into between a state agency or other such entity administering the Medicaid program and a health care provider or supplier under which the health care provider or supplier agrees to provide services for Medicaid patients in accordance with the terms of the agreement and Medicaid Regulations.

"Medicaid Regulations" means, collectively, (a) all federal statutes (whether set forth in Title XIX of the Social Security Act or elsewhere) affecting the medical assistance program established by Title XIX of the Social Security Act and any statutes

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succeeding thereto; (b) all applicable provisions of all federal rules, regulations, manuals and orders of all Governmental Authorities promulgated pursuant to or in connection with the statutes described in clause (a) above and all federal administrative, reimbursement and other guidelines of all Governmental Authorities having the force of law promulgated pursuant to or in connection with the statutes described in clause (a) above; (c) all state statutes and plans for medical assistance enacted in connection with the statutes and provisions described in clauses (a) and (b) above; and (d) all applicable provisions of all rules, regulations, manuals and orders of all Governmental Authorities promulgated pursuant to or in connection with the statutes described in clause (c) above and all state administrative, reimbursement and other guidelines of all Governmental Authorities having the force of law promulgated pursuant to or in connection with the statutes described in clause (b) above, in each case as may be amended, supplemented or otherwise modified from time to time.

"Medical Reimbursement Programs" shall mean Medicare, Medicaid, CHAMPUS and TRICARE programs and any other healthcare program operated by or financed in whole or in part by any foreign, domestic, federal, state or local government and any other non-government funded third party payor programs.

"Medicare Provider Agreement" means an agreement entered into between HCFA or other such entity administering the Medicare program on behalf of the HCFA, and a health care provider or supplier under which the health care provider or supplier agrees to provide services for Medicare patients in accordance with the terms of the agreement and Medicare Regulations.

"Medicare" shall mean that government-sponsored entitlement program under Title XVIII of the Social Security Act that provides for a health insurance system for eligible elderly and disabled individuals.

"Medicare Regulations" shall mean, collectively, all Federal statutes (whether set forth in Title XVIII of the Social Security Act or elsewhere) affecting the health insurance program for the aged and disabled established by Title XVIII of the Social Security Act and any statutes succeeding thereto; together with all applicable provisions of all rules, regulations, manuals and orders and administrative, reimbursement and other guidelines having the force of law of all Governmental Authorities (including, without limitation, the United States Department of Health and Human Services ("HHS"), HCFA, the OIG, or any person succeeding to the functions of any of the foregoing) promulgated pursuant to or in connection with any of the foregoing having the force of law, as each may be amended, supplemented or otherwise modified from time to time.

"MedPlus" means MedPlus, Inc., an Ohio corporation.

"Moody's" means Moody's Investors Service, Inc., or any successor or assignee of the business of such company in the business of rating securities.

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"Multiemployer Plan" means a Plan which is a multiemployer plan as defined in Sections 3(37) or 4001(a)(3) of ERISA.

"Multiple Employer Plan" means a Plan covered by Title IV of ERISA (other than a Multiemployer Plan) in which the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate and at least one employer other than the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate are contributing sponsors.

"Net Income" means, for any period, the net income after taxes for such period of the Borrower and its Subsidiaries on a consolidated basis, as determined in accordance with GAAP.

"Non-Cash Items" has the meaning set forth in the definition of EBITDA in Section 1.1

"Non-Material Domestic Subsidiary" means any wholly-owned Domestic Subsidiary that is not a Guarantor other than Quest Receivables.

"Note" or "Notes" means the Revolving Notes, the Term Notes, the Competitive Bid Loan Notes and the Swing Line Loan Note, individually or collectively, as appropriate.

"Notice of Borrowing" means a request by the Borrower for a Loan, in the form of Exhibit 2.1(b).

"Notice of Continuation/Conversion" means a request by the Borrower to continue an existing Eurodollar Loan to a new Interest Period or to convert a Eurodollar Loan to a Base Rate Loan or a Base Rate Loan to a Eurodollar Loan, in the form of Exhibit 2.3.

"OIG" means the Office of Inspector General of the United States Department of Health and Human Services.

"Participants" means Lenders with a Revolving Loan Commitment Percentage greater than zero.

"Participation Interest" means the Extension of Credit by a Lender by way of a purchase of a participation in (a) Letters of Credit or LOC Obligations as provided in Section 2.2, (b) Swing Line Loans as provided in Section 2.3 or (c) any Loans as provided in Section 3.8.

"PBGC" means the Pension Benefit Guaranty Corporation established pursuant to Subtitle A of Title IV of ERISA and any successor thereto.

"Permitted Acquisition" means an Acquisition by the Borrower or any of its Subsidiaries; provided that (a) substantially all of the Property acquired (or the Property of the Person acquired) in such Acquisition constitutes Eligible Assets (or goodwill associated therewith), (b) in the case of an Acquisition of the Capital Stock of another

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Person, the board of directors (or other comparable governing body) of such other Person or its parent shall have duly approved such Acquisition, (c) the Leverage Ratio (i) as of the most recently ended fiscal quarter for which an officer's certificate has been delivered pursuant to Section 7.1(c) is less than 2.75 to 1.0 and (ii) on a Pro Forma Basis giving effect to such Acquisition is less than 2.75 to 1.0,
(d) if such Acquisition involves total consideration (cash and non-cash) in excess of $100,000,000, the Borrower shall deliver to the Administrative Agent, prior to the closing of such Acquisition, a certificate of an Authorized Officer of the Borrower providing calculations showing that the requirement in clause (c)(ii) above is accurate, (e) on the date of such Acquisition no Event of Default exists, (f) after giving effect to such Acquisition, no Default or Event of Default shall exist, (g) if such Acquisition involves the formation of a new Subsidiary of the Borrower, such Subsidiary complies with Section 7.12 and (h) such Acquisition is undertaken in accordance with all laws, rules, regulations, orders, writs, judgments, injunctions, decrees and awards to which any party to such Acquisition may be subject.

"Permitted Investments" means Investments which constitute the following: (a) cash or Cash Equivalents, (b) trade accounts receivable created, acquired or made in the ordinary course of business, (c) inventory, raw materials, general intangibles and other current assets acquired in the ordinary course of business, (d) Investments by a the Borrower or one of its Subsidiaries in each other, (e) Permitted Acquisitions, (f) advances to management personnel and employees in the ordinary course of business, (g) Investments existing as of the Closing Date; provided that any such Investment in excess of $2,000,000 is set forth on Schedule 8.6, (h) Investments consisting of non-cash consideration received in the form of securities, notes or similar obligations in connection with any conveyance, sale, lease, assignment, transfer or other disposition of any Property by the Borrower or one of its Subsidiaries to any Person, and which are permitted hereunder, (i) increases in the value of Persons in the Strategic Investment Portfolio that did not result from any incremental investment by the Borrower or one of its Subsidiaries, (j) other Investments (in addition to those set forth above) not to exceed, in the aggregate, during any consecutive period during the term of this Credit Agreement that the Leverage Ratio is greater than or equal to 2.75 to 1.0, the sum of (i) $50,000,000 plus (ii) the amount of cash proceeds from sales of assets in the Strategic Investment Portfolio and (k) any other Investment as long as (i) the Leverage Ratio (A) as of the end of the most recent fiscal quarter for which an officer's certificate has been delivered pursuant to Section 7.1(c) is less than 2.75 to 1.0 and (B) on a Pro Forma Basis giving effect to such Investment is less than 2.75 to 1.0,
(ii) if such Investment involves total consideration (cash and non-cash) in excess of $100,000,000, the Borrower shall deliver to the Administrative Agent, prior to the closing of such Investment, a certificate of an Authorized Officer of the Borrower providing calculations showing that the requirement in clause (j)(i)(B) above is accurate, (iii) on the date of such Investment, no Event of Default exists and (iv) after giving effect to such Investment no Default or Event of Default shall exist.

"Permitted Liens" means (a) Liens securing Credit Party Obligations, if any, (b) Liens for taxes not yet due or Liens for taxes being contested in good faith by appropriate proceedings for which adequate reserves determined in accordance with GAAP have been established (and as to which the Property subject to any such Lien is not yet

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subject to foreclosure, sale, collection, levy or loss on account thereof), (c) Liens in respect of Property imposed by law arising in the ordinary course of business such as materialmen's, mechanics', warehousemen's, carrier's, landlords' and other nonconsensual statutory Liens which are not yet due and payable or which are being contested in good faith by appropriate proceedings for which adequate reserves determined in accordance with GAAP have been established (and as to which the Property subject to any such Lien is not yet subject to foreclosure, sale or loss on account thereof), (d) Liens (other than Liens imposed under ERISA) consisting of pledges or deposits made in the ordinary course of business to secure payment of worker's compensation insurance, unemployment insurance, pensions or social security programs, (e) Liens arising from good faith deposits in connection with or to secure performance of tenders, bids, leases, government contracts, performance and return-of-money bonds and other similar obligations incurred in the ordinary course of business (other than obligations in respect of the payment of borrowed money), (f) Liens arising from good faith deposits in connection with or to secure performance of statutory obligations and surety and appeal bonds, (g) easements, rights-of-way, restrictions (including zoning restrictions), matters of plat, minor defects or irregularities in title and other similar charges or encumbrances not, in any material respect, impairing the use of the encumbered Property for its intended purposes, (h) judgment Liens that would not constitute an Event of Default, (i) Liens in connection with Indebtedness permitted by Sections 8.1(d), (j) Liens arising by virtue of any statutory or common law provision relating to banker's liens, rights of setoff or similar rights as to deposit accounts or other funds maintained with a creditor depository institution, (k) Liens existing on the date hereof and identified on Schedule 8.2, (l) Liens upon Property acquired (or the Property of a Subsidiary that is acquired) after the Effective Date by the Borrower or its Subsidiaries, which Liens either (i) existed on such Property before the time of such acquisition and was not created in anticipation thereof or (ii) were created solely for the purpose of securing Indebtedness representing, or incurred to finance or refinance, the cost of such Property or improvements thereon; provided, however; that (A) no such Lien shall extend to or cover any Property of any Credit Party other than the Property so acquired and improvements thereon and proceeds thereof, (B) the principal amount of Indebtedness secured by any such Lien shall at no time exceed 100% of the fair market value of such Property at the time it was acquired or constructed and (C) the Indebtedness secured by any such Lien is permitted hereunder; provided that (x) no such Lien shall extend to any Property other than the Property subject thereto on the closing date of such acquisition and
(y) the principal amount of the Indebtedness secured by such Liens shall not be increased, (m) Liens in connection with Permitted Receivables Financing, (n) Liens with respect to lease filings for notice purposes only, (o) Liens on purchase money Indebtedness incurred by the Borrower in an amount not to exceed, in the aggregate, $50,000,000 less Indebtedness incurred by Subsidiaries of the Borrower pursuant to Section 8.1(d), (p) Liens on Property of non-wholly owned Subsidiaries of the Borrowers incurred to finance working capital and
(q) renewals and extensions of the foregoing so long as such Lien (i) does not cover any additional Property, (ii) does not secure additional Indebtedness and (iii) is not otherwise prohibited by this Credit Agreement.

"Permitted Receivables Financing" means any transaction entered into pursuant to documentation reasonably acceptable to the Administrative Agent in which (a) one or more

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Credit Parties sells, conveys or otherwise transfers to Quest Receivables and (b) Quest Receivables sells, conveys or otherwise transfers to any other Person or grants a security interest to any Person in, any Receivables (whether now existing or hereafter acquired) of a Credit Party, and any assets related thereto including all collateral securing such Receivables, all contracts and all Guaranty Obligations or other obligations in respect of such Receivables, all proceeds of such Receivables and all other assets that are customarily transferred or in respect of which security interests are customarily granted in connection with asset securitization transactions involving Receivables.

"Person" means any individual, partnership, joint venture, firm, corporation, limited liability company, association, trust or other enterprise (whether or not incorporated), or any Governmental Authority.

"Plan" means any employee benefit plan (as defined in Section 3(3) of ERISA) which is covered by ERISA and with respect to which the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate is (or, if such plan were terminated at such time, would under Section 4069 of ERISA be deemed to be) an "employer" within the meaning of Section 3(5) of ERISA.

"Prime Rate" means the per annum rate of interest established from time to time by the Administrative Agent at its principal office in Charlotte, North Carolina (or such other principal office of the Administrative Agent as communicated in writing to the Borrower and the Lenders) as its Prime Rate. Any change in the interest rate resulting from a change in the Prime Rate shall become effective as of 12:01 a.m. of the Business Day on which each change in the Prime Rate is announced by the Administrative Agent. The Prime Rate is a reference rate used by the Administrative Agent in determining interest rates on certain loans and is not intended to be the lowest rate of interest charged on any extension of credit to any debtor.

"Principal Property" means any real property and any related buildings, fixtures or other improvements located in the United States owned by the Borrower or its Subsidiaries (a) on or in which one of its 30 largest domestic clinical laboratories conducts operations, as determined by net revenues for the four most recent fiscal quarters for which financial statements have been filed with the Securities and Exchange Commission, or (b) the net book value of which at the time of the determination exceeds 1% of Total Assets.

"Pro Forma Basis" means, in connection with any Permitted Acquisition, Permitted Investment or Stock Repurchase, that such Acquisition, Investment, or Stock Repurchase occurred as of the end of the last fiscal quarter for which the Borrower has delivered an officer's certificate pursuant to Section 7.1(c).

"Property" means any right, title or interest in or to any property or asset of any kind whatsoever, whether real, personal or mixed and whether tangible or intangible.

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"Quest Receivables" means Quest Diagnostics Receivables Incorporated, a Delaware corporation, a wholly-owned, bankruptcy-remote, special purpose Subsidiary of the Borrower.

"Real Properties" has the meaning given thereto in Section 6.19.

"Receivable" means the indebtedness and payment obligations of any Person to any Credit Party or acquired by any Credit Party (including obligations constituting an account or general intangible or evidenced by a note, instrument, contract, security agreement, chattel paper or other evidence of indebtedness or security) arising from a sale of merchandise or the provision of services in the ordinary course of business by such Credit Party or the Person from which such indebtedness and payment obligation were acquired by any Credit Party, including (a) any right to payment for goods sold or for services rendered and (b) the right to payment of any interest, sales taxes, finance charges, returned check or late charges and other obligations of such Person with respect thereto.

"Regulation A, D, T, U or X" means Regulation A, D, T, U or X, respectively, of the Board of Governors of the Federal Reserve System as from time to time in effect and any successor to all or a portion thereof.

"Required Lenders" means Lenders whose aggregate Credit Exposure (as hereinafter defined) constitutes more than 50% of the Credit Exposure of all Lenders at such time; provided, however, that if any Lender shall be a Defaulting Lender at such time then there shall be excluded from the determination of Required Lenders the aggregate principal amount of Credit Exposure of such Lender at such time. For purposes hereof, the term "Credit Exposure" as applied to each Lender shall mean (a) at any time prior to the termination of the Commitments, the sum of (i) the Revolving Loan Commitment Percentage of such Lender multiplied by the Revolving Committed Amount plus (ii) the Term Loan Commitment Percentage of such Lender multiplied by the aggregate principal amount of Term Loans outstanding at such time and (b) at any time after the termination of the Commitments, the sum of (i) the principal balance of the outstanding Loans of such Lender plus (ii) such Lender's Participation Interests in the face amount of the outstanding Letters of Credit and outstanding Swing Line Loans.

"Requirement of Law" means, as to any Person, the articles or certificate of incorporation and by-laws or other organizational or governing documents of such Person, and any law, treaty, rule or regulation or final, non-appealable determination of an arbitrator or a court or other Governmental Authority, in each case applicable to or binding upon such Person or to which any of its material Property is subject.

"Reportable Event" means any of the events set forth in
Section 4043(c) of ERISA, other than those events as to which the notice requirement has been waived by regulation or by the PBGC.

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"Revolving Committed Amount" means THREE HUNDRED TWENTY FIVE MILLION DOLLARS ($325,000,000) or such lesser amount to which the Revolving Committed Amount may be reduced pursuant to Section 2.1(d).

"Revolving Loan Commitment Percentage" means, for each Lender, the percentage identified as its Revolving Loan Commitment Percentage on Schedule 1.1(a), as such percentage may be modified in connection with any assignment made in accordance with the provisions of Section 11.3.

"Revolving Loans" means the Revolving Loans made to the Borrower pursuant to Section 2.1.

"Revolving Notes" means the promissory notes of the Borrower in favor of each of the Lenders evidencing the Revolving Loans provided pursuant to Section 2.1, individually or collectively, as appropriate, as such promissory notes may be amended, modified, supplemented, extended, renewed or replaced from time to time and as evidenced in the form of Exhibit 2.1(e).

"Sale and Leaseback Transaction" means any arrangement with any Person providing for the leasing by the Borrower or one of its Subsidiaries of any Principal Property that has been or is to be sold or transferred by the Borrower or any Guarantor to such Person, as the case may be.

"S&P" means Standard & Poor's Ratings Services, a division of The McGraw-Hill Companies, Inc. or any successor or assignee of the business of such division in the business of rating securities.

"SBCL Acquisition Agreement" means the Stock and Asset Purchase Agreement, dated as of February 9, 1999, among the Borrower, SmithKline Beecham plc and SmithKline Beecham Corporation, as amended.

"Scheduled Funded Debt Payments" means, for any period, with respect to the Borrower and its Subsidiaries on a consolidated basis, the sum of all scheduled payments of principal on Funded Debt (including the implied principal component of payments due on Capital Leases and Synthetic Leases). It is understood and agreed that any amortization payments made in connection with a Permitted Receivables Financing are not Scheduled Funded Debt Payments; provided, however, should such Indebtedness pursuant to a Permitted Receivables Financing be required to be repaid due to the termination (whether at its stated maturity or otherwise) of such Permitted Receivables Financing and should no replacement facility be in effect on such termination date, the repayment of such Indebtedness shall constitute a Scheduled Funded Debt Payment.

"Securities Act" means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder, as amended, modified, succeeded or replaced from time to time.

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"Senior Unsecured Notes" means those certain senior unsecured notes issued by the Borrower on the Closing Date.

"Single Employer Plan" means any Plan which is covered by Title IV of ERISA, but which is not a Multiemployer Plan or a Multiple Employer Plan.

"Social Security Act" means the Social Security Act as set forth in Title 42 of the United States Code, as amended, and any successor statute thereto, as interpreted by the rules and regulations issued thereunder, in each case as in effect from time to time. References to sections of the Social Security Act shall be construed also to refer to any successor sections.

"Solvent" means, with respect to any Person as of a particular date, that on such date (a) such Person is able to pay its debts and other liabilities, contingent obligations and other commitments as they mature in the normal course of business, (b) such Person does not intend to, and does not believe that it will, incur debts or liabilities beyond such Person's ability to pay as such debts and liabilities mature in their ordinary course, (c) such Person is not engaged in a business or a transaction, and is not about to engage in a business or a transaction, for which such Person's assets would constitute unreasonably small capital after giving due consideration to the prevailing practice in the industry in which such Person is engaged or is to engage, (d) the fair value of the assets of such Person is greater than the total amount of liabilities, including, without limitation, contingent liabilities, of such Person and (e) the present fair saleable value of the assets of such Person is not less than the amount that will be required to pay the probable liability of such Person on its debts as they become absolute and matured. In computing the amount of contingent liabilities at any time, it is intended that such liabilities will be computed at the amount which, in light of all the facts and circumstances existing at such time, represents the amount that can reasonably be expected to become an actual or matured liability reduced by the amount of any contribution or indemnity that can reasonably be expected to be received.

"Stock Repurchase" has the meaning set forth in Section 8.9.

"Strategic Investment Portfolio" means all Investments in Persons in which the Borrower and its Subsidiaries own less than 50% of the Voting Stock of such Person.

"Subsidiary" means, as to any Person, (a) any corporation more than 50% of whose stock of any class or classes having by the terms thereof ordinary voting power to elect a majority of the directors of such corporation (irrespective of whether or not at the time, any class or classes of such corporation shall have or might have voting power by reason of the happening of any contingency) is at the time owned by such Person directly or indirectly through Subsidiaries, and (b) any partnership, association, joint venture or other entity in which such person directly or indirectly through Subsidiaries has more than a 50% equity interest at any time.

"Swing Line Committed Amount" means SIXTY FIVE MILLION DOLLARS ($65,000,000).

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"Swing Line Lender" means Bank of America.

"Swing Line Loans" means the loans made by the Swing Line Lender pursuant to Section 2.3.

"Swing Line Loan Note" means the promissory note of the Borrower in favor of the Swing Line Lender evidencing the Swing Line Loans provided pursuant to Section 2.3, as such promissory note may be amended, modified, supplemented, extended, renewed or replaced from time to time in and as evidenced by the form of Exhibit 2.3(d).

"Swing Line Loan Request" means a request by the Borrower for a Swing Line Loan in substantially the form of Exhibit 2.3(b).

"Synthetic Lease" means any synthetic lease, tax retention operating lease, off-balance sheet loan or similar off-balance sheet financing product where such transaction is considered borrowed money indebtedness for tax purposes but is classified as an operating lease in accordance with GAAP.

"Tender Costs" means the costs incurred by the Borrower in connection with the tender for the Existing Senior Subordinated Notes and the termination of the interest rate swap contracts existing prior to the Closing Date in an aggregate amount not to exceed $20,000,000.

"Term Loan Committed Amount" means ONE HUNDRED SEVENTY FIVE
MILLION DOLLARS ($175,000,000).

"Term Loan Commitment Percentage" means, for each Lender, the percentage identified as its Term Loan Commitment Percentage on Schedule 1.1(a), as such percentage may be modified in connection with any assignment made in accordance with the provisions of Section 11.3.

"Term Loans" means the Term Loans made to the Borrower pursuant to Section 2.5.

"Term Notes" means the promissory notes of the Borrower in favor of each of the Lenders evidencing the Term Loans provided pursuant to Section 2.5, individually or collectively, as appropriate, as such promissory notes may be amended, modified, supplemented, extended, renewed or replaced from time to time and as evidenced in the form of Exhibit 2.5(d).

"Total Assets" means all items that in accordance with GAAP would be classified as assets of the Borrower and its Subsidiaries on a consolidated basis.

"TRICARE" means the United States Department of Defense health care program for service families including, but not limited to, TRICARE Prime, TRICARE Extra and

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TRICARE Standard, and any successor to or predecessor thereof (including, without limitation, CHAMPUS).

"Voting Stock" means all classes of the Capital Stock of such Person then outstanding and normally entitled to vote in the election of directors (or similar governing authority).

1.2 Computation of Time Periods and Other Definitional Provisions.

For purposes of computation of periods of time hereunder, the word "from" means "from and including" and the words "to" and "until" each mean "to but excluding." References in this Credit Agreement to "Articles", "Sections", "Schedules" or "Exhibits" shall be to Articles, Sections, Schedules or Exhibits of or to this Credit Agreement unless otherwise specifically provided.

1.3 Accounting Terms/Calculation of Financial Covenants.

(a) Except as otherwise expressly provided herein, all accounting terms used herein shall be interpreted, and all financial statements and certificates and reports as to financial matters required to be delivered to the Lenders hereunder shall be prepared, in accordance with GAAP applied on a consistent basis. All calculations made for the purposes of determining compliance with this Credit Agreement shall (except as otherwise expressly provided herein) be made by application of GAAP applied on a basis consistent with the most recent annual or quarterly financial statements delivered pursuant to
Section 7.1 (or, prior to the delivery of the first financial statements pursuant to Section 7.1, consistent with the financial statements delivered to the Lenders prior to the Closing Date); provided, however, if (a) the Borrower shall object to determining such compliance on such basis at the time of delivery of such financial statements due to any change in GAAP or the rules promulgated with respect thereto or (b) the Administrative Agent or the Required Lenders shall so object in writing within 30 days after delivery of such financial statements, then such calculations shall be made on a basis consistent with GAAP as in effect as of the date of the most recent financial statements delivered by the Borrower to the Lenders to which no such objection shall have been made.

(b) Notwithstanding anything herein to the contrary, for the purposes of calculating the financial covenants set forth in Section 7.2, (i) income statement items (positive or negative) attributable to any Person or Property acquired in a Permitted Acquisition and Indebtedness incurred in connection with such Permitted Acquisition shall, without duplication, be treated as if such Person or Property was acquired or such Indebtedness incurred as of the first day of the twelve month period ending as of the most recently completely fiscal quarter of the Borrower and (ii) income statement items (positive or negative) attributable to Property disposed of in any asset sale permitted by Section 8.5(g) and Indebtedness retired in connection with such sale shall, without duplication, be treated as if such sale occurred as of the first day of the twelve month period ending as of the most recently completed fiscal quarter of the Borrower.

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1.4 Time.

All references to time herein shall be references to Eastern Standard Time or Eastern Daylight time, as the case may be, unless specified otherwise.

SECTION 2

CREDIT FACILITIES

2.1 Revolving Loans.

(a) Loan Commitment. Subject to the terms and conditions set forth herein, including but not limited to Section 5.2, each Lender severally agrees to make revolving loans (each a "Revolving Loan" and collectively the "Revolving Loans") to the Borrower, in Dollars, in an amount equal to its Revolving Loan Commitment Percentage, if any, of such Revolving Loan, at any time and from time to time, during the period from and including the Effective Date to but not including the Maturity Date (or such earlier date if the Commitments have been terminated as provided herein); provided, however, that the sum of the aggregate amount of Revolving Loans outstanding plus the aggregate amount of LOC Obligations outstanding plus the aggregate amount of Competitive Bid Loans outstanding plus the aggregate amount of Swing Line Loans outstanding shall not exceed the Revolving Committed Amount. Subject to the terms of this Credit Agreement, the Borrower may borrow, repay and reborrow Revolving Loans.

(b) Method of Borrowing for Revolving Loans. By no later than 11:00 a.m. (i) on the date of the requested borrowing of Revolving Loans that will be Base Rate Loans or (ii) three Business Days prior to the date of the requested borrowing of Revolving Loans that will be Eurodollar Loans, the Borrower shall provide telephonic notice to the Administrative Agent, followed promptly by a written Notice of Borrowing in the form of Exhibit 2.1(b) (which may be submitted by telecopy), each of such telephonic notice and such written Notice of Borrowing setting forth (A) the amount requested, (B) whether such Revolving Loans shall accrue interest at the Base Rate or the Adjusted Eurodollar Rate, (C) with respect to Revolving Loans that will be Eurodollar Loans, the Interest Period applicable thereto and (D) certification that the Borrower has complied in all respects with
Section 5.2.

(c) Funding of Loans. Upon receipt of a Notice of Borrowing, the Administrative Agent shall promptly inform the Lenders as to the terms thereof. Each Lender shall make its Revolving Loan Commitment Percentage of the requested Revolving Loans available to the Administrative Agent by 1:00 p.m. on the date specified in the Notice of Borrowing by deposit, in Dollars, of immediately available funds at the Agency Services Address. The amount of the requested Revolving Loans will then be made available to the Borrower by the Administrative Agent as directed by the Borrower, to the extent the amount of such Revolving Loans are made available to the Administrative Agent.

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No Lender shall be responsible for the failure or delay by any other Lender in its obligation to make Revolving Loans hereunder; provided, however, that the failure of any Lender to fulfill its obligations hereunder shall not relieve any other Lender of its obligations hereunder. Unless the Administrative Agent shall have been notified by any Lender prior to the date of any such Revolving Loan that such Lender does not intend to make available to the Administrative Agent its portion of the Revolving Loans to be made on such date, the Administrative Agent may assume that such Lender has made such amount available to the Administrative Agent on the date of such Revolving Loans, and the Administrative Agent in reliance upon such assumption, may (in its sole discretion but without any obligation to do so) make available to the Borrower a corresponding amount. If such corresponding amount is not in fact made available to the Administrative Agent, the Administrative Agent shall be able to recover such corresponding amount from such Lender. If such Lender does not pay such corresponding amount upon the Administrative Agent's demand therefor, the Administrative Agent will promptly notify the Borrower, and the Borrower shall immediately pay such corresponding amount to the Administrative Agent. The Administrative Agent shall also be entitled to recover from such Lender or the Borrower, as the case may be, interest on such corresponding amount in respect of each day from the date such corresponding amount was made available by the Administrative Agent to the Borrower to the date such corresponding amount is recovered by the Administrative Agent at a per annum rate equal to (i) from the Borrower at the applicable rate for such Revolving Loan pursuant to the Notice of Borrowing or (ii) from such Lender, at a rate per annum equal to, during the period to but excluding the date two Business Days after demand therefor, the Federal Funds Rate, and, thereafter, the Base Rate plus two percent (2%) per annum.

(d) Reductions of Revolving Committed Amount. Upon at least three Business Days' prior written notice, the Borrower shall have the right to permanently reduce, without premium or penalty, all or part of the aggregate unused amount of the Revolving Committed Amount at any time or from time to time; provided that (i) each partial reduction shall be in an aggregate amount at least equal to $10,000,000 and in integral multiples of $1,000,000 above such amount and (ii) no reduction shall be made which would reduce the Revolving Committed Amount to an amount less than the aggregate amount of outstanding Revolving Loans plus the aggregate amount of outstanding LOC Obligations plus the aggregate amount of outstanding Competitive Bid Loans plus the aggregate amount of outstanding Swing Line Loans. Any reduction in (or termination of) the Revolving Committed Amount pursuant to this Section 2.1(d) shall be permanent and may not be reinstated. The Administrative Agent shall immediately notify the Lenders of any reduction in the Revolving Committed Amount pursuant to this Section 2.1(d).

(e) Revolving Loan Notes. The Revolving Loans made by each Lender shall be evidenced by a duly executed promissory note of the Borrower to each Lender that requests a Revolving Loan Note in substantially the form of Exhibit 2.1(e).

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2.2 Letter of Credit Subfacility.

(a) Issuance. Subject to the terms and conditions hereof and of the LOC Documents, if any, and any other terms and conditions which the Issuing Lender may reasonably require (so long as such terms and conditions do not impose any financial obligation on or require any Lien (not otherwise contemplated by this Credit Agreement) to be given by any Credit Party or conflict with any obligation of, or detract from any action which may be taken by, the Borrower or its Subsidiaries under this Credit Agreement), the Issuing Lender agrees, in reliance upon the agreements of the other Lenders set forth in this Section 2.2, from time to time upon request, in its reasonable discretion, to issue (from the Effective Date to thirty days prior to the Maturity Date and in a form reasonably acceptable to the Issuing Lender), in Dollars, and the Participants shall participate in, Letters of Credit for the account of the Borrower; provided, however, that (i) the aggregate amount of LOC Obligations shall not at any time exceed the LOC Committed Amount and (ii) the sum of the aggregate amount of outstanding LOC Obligations plus the aggregate amount of outstanding Revolving Loans plus the aggregate amount of outstanding Competitive Bid Loans plus the aggregate amount of outstanding Swing Line Loans shall not exceed the Revolving Committed Amount. The Issuing Lender may require the issuance and expiry date of each Letter of Credit to be a Business Day. Each Letter of Credit shall be either (A) a standby letter of credit issued to support the obligations (including pension or insurance obligations), contingent or otherwise, of the Borrower or any of its Subsidiaries, or (B) a commercial letter of credit in respect of the purchase of goods or services by the Borrower or any of its Subsidiaries in the ordinary course of business. Except as otherwise expressly agreed upon by all the Participants, no Letter of Credit shall have an original expiry date more than one year from the date of issuance nor, as extended or otherwise, shall have an expiry date beyond the Maturity Date. Each Letter of Credit shall comply with the related LOC Documents.

(b) Notice and Reports. The request for the issuance of a Letter of Credit shall be submitted to the Issuing Lender at least three Business Days prior to the requested date of issuance. The Issuing Lender will, at least quarterly and more frequently upon request, provide to the Administrative Agent for dissemination to the Lenders a report specifying the Letters of Credit which are then issued and outstanding. The Issuing Lender will further provide to the Administrative Agent, promptly upon request, copies of the Letters of Credit and the other LOC Documents.

(c) Participations.

(i) On the Effective Date, each Participant shall automatically acquire a participation in the liability of the Issuing Lender under each Existing Letter of Credit in an amount equal to its Revolving Loan Commitment Percentage of such Existing Letters of Credit.

(ii) Each Participant, upon issuance of a Letter of Credit, shall be deemed to have purchased without recourse a risk participation from the Issuing Lender in such Letter of Credit and each LOC Document related thereto and the

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rights and obligations arising thereunder and any collateral relating thereto, in each case in an amount equal to its Revolving Loan Commitment Percentage of the obligations under such Letter of Credit, and shall absolutely, unconditionally and irrevocably assume, as primary obligor and not as surety, and be obligated to pay to the Issuing Lender therefor and discharge when due, its Revolving Loan Commitment Percentage of the obligations arising under such Letter of Credit. Without limiting the scope and nature of each Participant's participation in any Letter of Credit, to the extent that the Issuing Lender has not been reimbursed as required hereunder or under any such Letter of Credit, each such Participant shall pay to the Issuing Lender its Revolving Loan Commitment Percentage of such unreimbursed drawing in same day funds on the day of notification by the Issuing Lender of an unreimbursed drawing pursuant to the provisions of subsection
(d) or (e) hereof. The obligation of each Participant to so reimburse the Issuing Lender shall be absolute and unconditional and shall not be affected by the occurrence of a Default, an Event of Default or any other occurrence or event. Any such reimbursement shall not relieve or otherwise impair the obligation of the Borrower or any other Credit Party to reimburse the Issuing Lender under any Letter of Credit, together with interest as hereinafter provided.

(d) Reimbursement. In the event of any drawing under any Letter of Credit, the Issuing Lender will promptly notify the Borrower. Unless the Borrower shall immediately notify the Issuing Lender of its intent to otherwise reimburse the Issuing Lender, the Borrower shall be deemed to have requested a Revolving Loan at the Base Rate in the amount of the drawing, the proceeds of which will be used to satisfy the reimbursement obligations. The Borrower shall reimburse the Issuing Lender on the day of drawing under any Letter of Credit either with the proceeds of such Revolving Loan obtained hereunder or otherwise in same day funds as provided herein or in the LOC Documents. The Borrower's reimbursement obligations hereunder shall be absolute and unconditional under all circumstances irrespective of (but without waiver of) any rights of set-off, counterclaim or defense to payment the applicable account party or the Borrower may claim or have against the Issuing Lender, the Administrative Agent, the Lenders, the beneficiary of the Letter of Credit drawn upon or any other Person, including without limitation, any defense based on any failure of the applicable account party, the Borrower or any other Credit Party to receive consideration or the legality, validity, regularity or unenforceability of the Letter of Credit. The Issuing Lender will promptly notify the Participants of the amount of any unreimbursed drawing and each Participant shall promptly pay to the Issuing Lender, in Dollars and in immediately available funds, the amount of such Participant's Revolving Loan Commitment Percentage of such unreimbursed drawing. Such payment shall be made on the day such notice is received by such Lender from the Issuing Lender if such notice is received at or before 12:00 Noon, otherwise such payment shall be made at or before 2:00 p.m. on the Business Day next succeeding the day such notice is received. If such Participant does not pay such amount to the Issuing Lender in full upon such request, such Participant shall, on demand, pay to the Issuing Lender interest on the unpaid amount during the period from the date the Participant received the notice regarding the unreimbursed drawing until such Participant pays such amount to the Issuing Lender in full at a rate per annum equal to, if paid within two Business Days of the date of drawing, the Federal Funds Rate and thereafter

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at a rate equal to the Base Rate plus two percent (2%) per annum. Each Participant's obligation to make such payment to the Issuing Lender, and the right of the Issuing Lender to receive the same, shall be absolute and unconditional, shall not be affected by any circumstance whatsoever and without regard to the termination of this Credit Agreement or the Commitments hereunder, the existence of a Default or Event of Default or the acceleration of the obligations hereunder and shall be made without any offset, abatement, withholding or reduction whatsoever. Simultaneously with the making of each such payment by a Participant to the Issuing Lender, such Participant shall, automatically and without any further action on the part of the Issuing Lender or such Participant, acquire a participation in an amount equal to such payment (excluding the portion of such payment constituting interest owing to the Issuing Lender) in the related unreimbursed drawing portion of the LOC Obligation and in the interest thereon and in the related LOC Documents, and shall have a claim against the Borrower and the other Credit Parties with respect thereto.

(e) Repayment with Loans. On any day on which the Borrower shall have requested, or been deemed to have requested, a Revolving Loan borrowing to reimburse a drawing under a Letter of Credit (as set forth in clause (d) above), the Administrative Agent shall give notice to the Lenders that a Revolving Loan has been requested or deemed requested in connection with a drawing under a Letter of Credit, in which case a Revolving Loan borrowing comprised solely of Base Rate Loans (each such borrowing, a "Mandatory Borrowing") shall be immediately made from all Lenders (without giving effect to any termination of the Commitments pursuant to Section 9.2) pro rata based on each Lender's respective Revolving Loan Commitment Percentage and the proceeds thereof shall be paid directly to the Issuing Lender for application to the respective LOC Obligations. Each applicable Lender hereby irrevocably agrees to make such Revolving Loans immediately upon any such request or deemed request on account of each such Mandatory Borrowing in the amount and in the manner specified in the preceding sentence and on the same such date notwithstanding (i) the amount of Mandatory Borrowing may not comply with the minimum amount for borrowings of Revolving Loans otherwise required hereunder, (ii) whether any conditions specified in Section 5.2 are then satisfied,
(iii) whether a Default or Event of Default then exists, (iv) failure of any such request or deemed request for Revolving Loans to be made by the time otherwise required hereunder, (v) the date of such Mandatory Borrowing, or (vi) any reduction in the Revolving Committed Amount or any termination of the Commitments. In the event that any Mandatory Borrowing cannot for any reason be made on the date otherwise required above (including, without limitation, as a result of the commencement of a proceeding under the Bankruptcy Code with respect to the Borrower or any other Credit Party), then each such Lender hereby agrees that it shall forthwith fund (as of the date the Mandatory Borrowing would otherwise have occurred, but adjusted for any payments received from the Borrower on or after such date and prior to such purchase) its Participation Interest in the outstanding LOC Obligations in accordance with the terms of subsection (d) above; provided, further, that in the event any such Lender shall fail to fund its Participation Interest on the day the Mandatory Borrowing would otherwise have occurred, then the amount of such Lender's unfunded Participation Interest therein shall bear interest payable to the Issuing Lender upon demand, at the rate equal to, if paid within

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two Business Days of such date, the Federal Funds Rate, and thereafter at a rate equal to the Base Rate plus two percent (2%) per annum.

(f) Modification and Extension. The issuance of any supplement, modification, amendment, renewal, or extensions to any Letter of Credit shall, for purposes hereof, be treated in all respects the same as the issuance of a new Letter of Credit hereunder.

(g) Uniform Customs and Practice. The Issuing Lender may have the Letters of Credit be subject to The Uniform Customs and Practice for Documentary Credits, including the International Chamber of Commerce decision by the Commission on Banking Technique and Practice of April 6, 1998 regarding the European Single Currency (euro), (the "UCP") or the International Standby Practices 1998 (the "ISP98"), in either case as published as of the date of issue by the International Chamber of Commerce, in which case the UCP or the ISP98, as applicable, may be incorporated therein and deemed in all respects to be a part thereof.

(h) Responsibility of Issuing Lender.

(i) It is expressly understood and agreed as between the Lenders that the obligations of the Issuing Lender hereunder to the Participants are only those expressly set forth in this Credit Agreement and that the Issuing Lender shall be entitled to assume that the conditions precedent set forth in Section 5.2 have been satisfied unless it shall have acquired actual knowledge that any such condition precedent has not been satisfied; provided, however, that nothing set forth in this Section 2.2 shall be deemed to prejudice the right of any Participant to recover from the Issuing Lender any amounts made available by such Participant to the Issuing Lender pursuant to this Section 2.2 in the event that it is determined by a court of competent jurisdiction that the payment with respect to a Letter of Credit constituted gross negligence or willful misconduct on the part of the Issuing Lender.

(ii) The Issuing Lender shall be under no obligation to issue any Letter of Credit if (a) any order, judgment or decree of any Governmental Authority or arbitrator shall by its terms purport to enjoin or restrain the Issuing Lender from issuing such Letter of Credit, (b) any Requirement of Law applicable to the Issuing Lender or any request or directive (whether or not having the force of law) from any Governmental Authority with jurisdiction over the Issuing Lender shall prohibit, or request that the Issuing Lender refrain from, the issuance of letters of credit generally or such Letter of Credit in particular or shall impose upon the Issuing Lender with respect to such Letter of Credit any restriction, reserve or capital requirement (for which the Issuing Lender is not otherwise compensated hereunder) not in effect on the Closing Date, or shall impose upon the Issuing Lender any unreimbursed loss, cost or expense which was not applicable on the Closing Date and which the Issuing Lender in good faith deems material to it, or (c) the issuance of such Letter of Credit would violate one or more policies of the Issuing Lender.

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(i) Conflict with LOC Documents. In the event of any conflict between this Credit Agreement and any LOC Document, this Credit Agreement shall govern.

(j) Indemnification of Issuing Lender.

(i) In addition to its other obligations under this Credit Agreement, the Borrower hereby agrees to protect, indemnify, pay and save the Issuing Lender harmless from and against any and all claims, demands, liabilities, damages, losses, costs, charges and expenses (including Attorney Costs) that the Issuing Lender may incur or be subject to as a consequence, direct or indirect, of (A) the issuance of any Letter of Credit or (B) the failure of the Issuing Lender to honor a drawing under a Letter of Credit as a result of any act or omission, whether rightful or wrongful, of any present or future de jure or de facto Governmental Authority (all such acts or omissions, herein called "Government Acts").

(ii) As between the Borrower and the Issuing Lender, the Borrower shall assume all risks of the acts, omissions or misuse of any Letter of Credit by the beneficiary thereof. The Issuing Lender shall not be responsible for (except in the case of (A), (B) and (C) below if the Issuing Lender has actual knowledge to the contrary): (A) the form, validity, sufficiency, accuracy, genuineness or legal effect of any document submitted by any party in connection with the application for and issuance of any Letter of Credit, even if it should in fact prove to be in any or all respects invalid, insufficient, inaccurate, fraudulent or forged; (B) the validity or sufficiency of any instrument transferring or assigning or purporting to transfer or assign any Letter of Credit or the rights or benefits thereunder or proceeds thereof, in whole or in part, that may prove to be invalid or ineffective for any reason; (C) failure of the beneficiary of a Letter of Credit to comply fully with conditions required in order to draw upon a Letter of Credit; (D) errors, omissions, interruptions or delays in transmission or delivery of any messages, by mail, cable, telegraph, telex or otherwise, whether or not they be in cipher; (E) any loss or delay in the transmission or otherwise of any document required in order to make a drawing under a Letter of Credit or of the proceeds thereof; and (F) any consequences arising from causes beyond the control of the Issuing Lender, including, without limitation, any Government Acts. None of the above shall affect, impair, or prevent the vesting of the Issuing Lender's rights or powers hereunder.

(iii) In furtherance and extension and not in limitation of the specific provisions hereinabove set forth, any action taken or omitted by the Issuing Lender, under or in connection with any Letter of Credit or the related certificates, if taken or omitted in good faith, shall not put the Issuing Lender under any resulting liability to the Borrower or any other Credit Party. It is the intention of the parties that this Credit Agreement shall be construed and applied to protect and indemnify the Issuing Lender against any and all risks involved in the issuance of the Letters of Credit, all of which risks are hereby assumed by the Borrower, including, without limitation, any and all risks of the acts or omissions, whether rightful or wrongful, of any present or future Government Acts. The Issuing Lender shall not, in any way,

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be liable for any failure by the Issuing Lender or anyone else to pay any drawing under any Letter of Credit as a result of any Government Acts or any other cause beyond the control of the Issuing Lender.

(iv) Nothing in this subsection (j) is intended to limit the reimbursement obligation of the Borrower contained in this Section 2.2. The obligations of the Borrower under this subsection (j) shall survive the termination of this Credit Agreement. No act or omission of any current or prior beneficiary of a Letter of Credit shall in any way affect or impair the rights of the Issuing Lender to enforce any right, power or benefit under this Credit Agreement.

(v) Notwithstanding anything to the contrary contained in this subsection (j), the Borrower shall have no obligation to indemnify the Issuing Lender in respect of any liability incurred by the Issuing Lender arising out of the gross negligence or willful misconduct of the Issuing Lender, as determined by a court of competent jurisdiction.

(k) Designation of other Persons as Account Parties. Notwithstanding anything to the contrary set forth in this Credit Agreement, including without limitation Section 2.2(a) hereof, a Letter of Credit issued hereunder may contain a statement to the effect that such Letter of Credit is issued for the account of a Subsidiary of the Borrower; provided that notwithstanding such statement, the Borrower shall be the actual account party for all purposes of this Credit Agreement for such Letter of Credit and such statement shall not affect the Borrower's reimbursement obligations hereunder with respect to such Letter of Credit.

2.3 Swing Line Loans Subfacility.

(a) Swing Line Loans. The Swing Line Lender hereby agrees, on the terms and subject to the conditions set forth herein and in the other Credit Documents, to make loans (each a "Swing Line Loan" and collectively, the "Swing Line Loans") to the Borrower, in Dollars, at any time and from time to time, during the period from and including the Effective Date to but not including the Maturity Date (or such earlier date if the Commitments have been terminated as provided herein); provided that (i) the aggregate principal amount of the Swing Line Loans outstanding at any one time shall not exceed the Swing Line Committed Amount and (ii) the aggregate amount of outstanding Swing Line Loans plus the aggregate amount of outstanding Revolving Loans plus the aggregate amount of outstanding LOC Obligations plus the aggregate amount of outstanding Competitive Bid Loans shall not exceed the Revolving Committed Amount. Subject to the terms of this Credit Agreement, the Borrower may borrow, repay and reborrow Swing Line Loans.

(b) Method of Borrowing and Funding Swing Line Loans. By no later than 1:00 p.m. on the date of the requested borrowing of Swing Line Loans, the Borrower shall provide telephone notice to the Swing Line Lender, followed promptly by a written Swing Line Loan Request in the form of Exhibit 2.3(b) (which may be submitted by telecopy)

33

setting forth (i) the amount of the requested Swing Line Loan and (ii) the date of the requested Swing Line Loan and complying in all respects with Section 5.2. The Swing Line Lender shall initiate the transfer of funds representing the Swing Line Loan advance to the Borrower by 3:00
p.m. on the Business Day of the requested borrowing.

(c) Repayment and Participations of Swing Line Loans. The Borrower agrees to repay all Swing Line Loans immediately upon the existence of a Default or Event of Default or otherwise within three Business Days of demand therefor by the Swing Line Lender. Each repayment of a Swing Line Loan may be accomplished by requesting Revolving Loans which request is not subject to the conditions set forth in Section 5.2. In the event that the Borrower shall fail to timely repay any Swing Line Loan, and in any event upon (i) a request by the Swing Line Lender, (ii) the occurrence of an Event of Default described in Section 9.1(f) or (iii) the acceleration of any Loan or termination of any Commitment pursuant to Section 9.2, each other Participant shall irrevocably and unconditionally purchase from the Swing Line Lender, without recourse or warranty, an undivided interest and participation in such Swing Line Loan in an amount equal to such other Lender's Revolving Loan Commitment Percentage thereof, by directly purchasing a participation in such Swing Line Loan in such amount (regardless of whether the conditions precedent thereto set forth in Section 5.2 are then satisfied, whether or not the Borrower has submitted a Notice of Borrowing and whether or not the Commitments are then in effect, any Event of Default exists or all the Loans have been accelerated) and paying the proceeds thereof to the Swing Line Lender at the Agency Services Address, or at such other address as the Swing Line Lender may designate, in Dollars and in immediately available funds. If such amount is not in fact made available to the Swing Line Lender by any Participant, the Swing Line Lender shall be entitled to recover such amount on demand from such Participant, together with accrued interest thereon for each day from the date of demand thereof, at a rate equal to, if paid within two Business Days of such date, the Federal Funds Rate, and thereafter at a rate equal to the Base Rate plus two percent (2%) per annum. If such Participant does not pay such amount forthwith upon the Swing Line Lender's demand therefor, and until such time as such Participant makes the required payment, the Swing Line Lender shall be deemed to continue to have outstanding Swing Line Loans in the amount of such unpaid participation obligation for all purposes of the Credit Documents other than those provisions requiring the other Participants to purchase a participation therein. Further, such Participant shall be deemed to have assigned any and all payments made of principal and interest on its Loans, and any other amounts due to it hereunder to the Swing Line Lender to fund Swing Line Loans in the amount of the participation in Swing Line Loans that such Participant failed to purchase pursuant to this Section 2.3(c) until such amount has been purchased (as a result of such assignment or otherwise).

(d) Swing Line Loan Note. The Swing Line Loans made by the Swing Line Lender shall, if requested by the Swing Line Lender, be evidenced by a duly executed promissory note of the Borrower to the Swing Line Lender in substantially the form of Exhibit 2.3(d).

34

2.4 Competitive Bid Loans Subfacility.

(a) Competitive Bid Loans. Subject to the terms and conditions set forth herein, the Borrower may, from time to time, during the period from the Closing Date to the Maturity Date, request, in Dollars, and each Lender may, in its sole discretion, agree to make loans to the Borrower in accordance with the terms of this Section 2.4 (each a "Competitive Bid Loan" and collectively the "Competitive Bid Loans"); provided, however, that (i) the sum of the aggregate amount of outstanding Revolving Loans plus the aggregate amount of outstanding Competitive Bid Loans plus the aggregate amount of outstanding Swing Line Loans plus the aggregate amount of outstanding LOC Obligations shall not exceed the Revolving Loan Commitment, (ii) the aggregate amount of Competitive Bid Loans outstanding at any one time cannot exceed $200,000,000 and (iii) if a Lender does make a Competitive Bid Loan it shall not reduce such Lender's obligation to make its pro rata share of any Revolving Loan.

(b) Competitive Bid Requests. The Borrower may solicit Competitive Bids by delivery of a Competitive Bid Request to the Administrative Agent by 11:00 a.m. on a Business Day not less than one nor more than five Business Days prior to the date of the requested Competitive Bid Loan. A Competitive Bid Request must be substantially in the form of Exhibit 2.4(b) and shall specify (i) the date of the requested Competitive Bid Loan (which shall be a Business Day), (ii) the amount of the requested Competitive Bid Loan and (iii) the applicable Interest Period or Interest Periods requested and be accompanied by the Competitive Bid Fee. The Agent shall notify the Lenders of its receipt of a Competitive Bid Request and the contents thereof and invite the Lenders to submit Competitive Bids in response thereto. The Borrower may not request a Competitive Bid for more than four different Interest Periods per Competitive Bid Request and Competitive Bid Requests may be made no more frequently than six times every calendar month.

(c) Competitive Bid Procedure. Each Lender may, in its sole discretion, make one or more Competitive Bids to the Borrower in response to a Competitive Bid Request. Each Competitive Bid must be received by the Administrative Agent not later than 11:00 a.m. on the proposed date of the requested Competitive Bid Loan; provided, however, that should the Administrative Agent, in its capacity as a Lender, desire to submit a Competitive Bid it shall notify the Borrower of its Competitive Bid and the terms thereof not later than 15 minutes prior to the time the other Lenders are required to submit their Competitive Bid. A Lender may offer to make all or part of the requested Competitive Bid Loan and may submit multiple Competitive Bids in response to a Competitive Bid Request. Any Competitive Bid must specify
(i) the particular Competitive Bid Request as to which the Competitive Bid is submitted, (ii) the minimum (which shall be not less than $10,000,000 and integral multiples of $1,000,000 in excess thereof) and maximum principal amounts of the requested Competitive Bid Loan or Loans as to which the Lender is willing to make and (iii) the applicable interest rate or rates and Interest Period or Interest Periods therefor. A Competitive Bid submitted by a Lender in accordance with the provisions hereof shall be irrevocable. The Administrative Agent shall promptly notify the Borrower of all Competitive Bids made and the terms

35

thereof. The Administrative Agent shall send a copy of each of the Competitive Bids to the Borrower and each of the Lenders for its records as soon as practicable.

(d) Acceptance of Competitive Bids. The Borrower may, in its sole discretion, subject only to the provisions of this subsection (d), accept or refuse any Competitive Bid offered to it. To accept a Competitive Bid, the Borrower shall give oral notification of its acceptance of any or all such Competitive Bids (which shall be promptly confirmed in writing) to the Administrative Agent by 12:00 noon on the proposed date of the Competitive Bid Loan; provided, however, (i) the failure by the Borrower to give timely notice of its acceptance of a Competitive Bid shall be deemed to be a refusal thereof, (ii) to the extent Competitive Bids are for comparable Interest Periods, the Borrower may accept Competitive Bids only in ascending order of rates,
(iii) the aggregate amount of Competitive Bids accepted by the Borrower shall not exceed the principal amount specified in the Competitive Bid Request, (iv) if the Borrower shall accept a bid or bids made at a particular Competitive Bid Rate, but the amount of such bid or bids shall cause the total amount of bids to be accepted by the Borrower to be in excess of the amount specified in the Competitive Bid Request, then the Borrower shall accept a portion of such bid or bids in an amount equal to the amount specified in the Competitive Bid Request less the amount of all other Competitive Bids accepted with respect to such Competitive Bid Request, which acceptance in the case of multiple bids at such Competitive Bid Rate, shall be made pro rata in accordance with the amount of each such bid at such Competitive Bid Rate and (v) no bid shall be accepted for a Competitive Bid Loan unless such Competitive Bid Loan is in a minimum principal amount of $10,000,000 and integral multiples of $1,000,000 in excess thereof, except that where a portion of a Competitive Bid is accepted in accordance with the provisions of clause (iv) of subsection (d) hereof, then in a minimum principal amount of $500,000 and integral multiples of $100,000 (but not in any event less than the minimum amount specified in the Competitive Bid), and in calculating the pro rata allocation of acceptances of portions of multiple bids at a particular Competitive Bid Rate pursuant to clause (iv) of subsection (d) hereof, the amounts shall be rounded to integral multiples of $100,000 in a manner which shall be in the discretion of the Borrower. A notice of acceptance of a Competitive Bid given by the Borrower in accordance with the provisions hereof shall be irrevocable. The Administrative Agent shall, not later than 1:00 p.m. on the proposed date of such Competitive Bid Loan, notify each bidding Lender whether or not its Competitive Bid has been accepted (and if so, in what amount and at what Competitive Bid Rate), and each successful bidder will thereupon become bound, subject to the other applicable conditions hereof, to make the Competitive Bid Loan in respect of which its bid has been accepted.

(e) Funding of Competitive Bid Loans. Each Lender which is to make a Competitive Bid Loan shall make its Competitive Bid Loan available to the Administrative Agent by 2:00 p.m. on the date specified in the Competitive Bid Request by deposit of immediately available funds at the Agency Services Address or at such other address as the Administrative Agent may designate in writing. The Administrative Agent will, upon receipt, make the proceeds of such Competitive Bid Loans available to the Borrower.

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(f) Maturity of Competitive Bid Loans. Each Competitive Bid Loan shall mature and be due and payable in full on the last day of the Interest Period applicable thereto. Unless the Borrower shall give notice to the Administrative Agent otherwise (or repays such Competitive Bid Loan), or a Default or Event of Default exists and is continuing, the Borrower shall be deemed to have requested Revolving Loans from all of the Lenders (in the amount of the maturing Competitive Bid Loan and accruing interest at the Base Rate), the proceeds of which will be used to repay such Competitive Bid Loan.

(g) Competitive Bid Loan Notes. The Competitive Bid Loans made by each Lender shall be evidenced by a duly executed promissory note of the Borrower to each Lender that requests a Competitive Bid Loan Note in substantially the form of Exhibit 2.4(g).

2.5 Term Loans.

(a) Term Loan. Subject to the terms and conditions set forth herein, each Lender severally agrees, on the Effective Date, to make a term loan (collectively, the "Term Loans") to the Borrower, in Dollars, in an amount equal to such Lender's Term Loan Commitment Percentage, if any, of the Term Loan Committed Amount; provided that the aggregate amount of such Term Loans made on the Effective Date shall not exceed the Term Loan Committed Amount. Once repaid, Term Loans cannot be reborrowed.

(b) Funding of Term Loans. On the Effective Date, each applicable Lender will make its Term Loan Commitment Percentage of the Term Loan Committed Amount available to the Administrative Agent by deposit, in Dollars and in immediately available funds, at the offices of the Administrative Agent at the Agency Services Address or at such other address as the Administrative Agent may designate in writing. The amount of the Term Loans will then be made available to the Borrower by the Administrative Agent by crediting the account of the Borrower on the books of such office of the Administrative Agent, to the extent the amount of such Term Loans are made available to the Administrative Agent.

No Lender shall be responsible for the failure or delay by any other Lender in its obligation to make a Term Loan hereunder; provided, however, that the failure of any Lender to fulfill its obligations hereunder shall not relieve any other Lender of its obligations hereunder. If the Administrative Agent shall have received an executed signature page to this Credit Agreement (whether an original or via telecopy) from a Lender, the Administrative Agent may assume that such Lender has or will make the amount of its Term Loans available to the Administrative Agent on the Effective Date, and the Administrative Agent in reliance upon such assumption, may (in its sole discretion but without any obligation to do so) make available to the Borrower a corresponding amount. If such corresponding amount is not in fact made available to the Administrative Agent, the Administrative Agent shall be able to recover such corresponding amount from such Lender. If such Lender does not pay such corresponding amount forthwith upon the Administrative Agent's demand therefor, the Administrative Agent will promptly notify the

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Borrower, and the Borrower shall immediately pay such corresponding amount to the Administrative Agent. The Administrative Agent shall also be entitled to recover from the Lender or the Borrower, as the case may be, interest on such corresponding amount in respect of each day from the date such corresponding amount was made available by the Administrative Agent to the Borrower to the date such corresponding amount is recovered by the Administrative Agent at a per annum rate equal to (i) from the Borrower at the Adjusted Base Rate and (ii) from a Lender at the Federal Funds Rate if paid within two Business Days of the date of drawing and thereafter at a rate equal to the Base Rate plus two percent (2%) per annum.

(c) Amortization. The principal amount of the Term Loans shall be repaid in quarterly payments on the dates set forth below:

--------------------------------------------------------------
         Principal Amortization        Term Loan Principal
             Payment Dates            Amortization Payments
--------------------------------------------------------------
                9/30/01                     $6,562,500
--------------------------------------------------------------
                12/31/01                    $6,562,500
--------------------------------------------------------------
                3/31/02                     $6,562,500
--------------------------------------------------------------
                6/30/02                     $6,562,500
--------------------------------------------------------------
                9/30/02                     $8,750,000
--------------------------------------------------------------
                12/31/02                    $8,750,000
--------------------------------------------------------------
                3/31/03                     $8,750,000
--------------------------------------------------------------
                6/30/03                     $8,750,000
--------------------------------------------------------------
                9/30/03                     $8,750,000
--------------------------------------------------------------
                12/31/03                    $8,750,000
--------------------------------------------------------------
                3/31/04                     $8,750,000
--------------------------------------------------------------
                6/30/04                     $8,750,000
--------------------------------------------------------------
                9/30/04                     $8,750,000
--------------------------------------------------------------
                12/31/04                    $8,750,000
--------------------------------------------------------------
                3/31/05                     $8,750,000
--------------------------------------------------------------
                 6/30/05                     $8,750,000
--------------------------------------------------------------
                 9/30/05                    $10,937,500
--------------------------------------------------------------
                12/31/05                   $10,937,500
--------------------------------------------------------------
                3/31/06                    $10,937,500
--------------------------------------------------------------
             Maturity Date                 $10,937,500
--------------------------------------------------------------

(d) Term Notes. The portion of the Term Loans made by each Lender shall be evidenced by a duly executed promissory note of the Borrower to each Lender that requests a Term Note in substantially the form of Exhibit 2.5(d).

2.6 Continuations and Conversions.

Subject to the terms below, the Borrower shall have the option, on any Business Day, to continue existing Eurodollar Loans for a subsequent Interest Period, to convert Base Rate Loans into Eurodollar Loans or to convert Eurodollar Loans into Base Rate Loans. By no later than 11:00 a.m. (a) on the date of the requested conversion of a Eurodollar Loan to a Base Rate Loan or (b) three Business Days prior to the date of the requested continuation of a Eurodollar Loan or conversion of a Base Rate Loan to a Eurodollar Loan, the Borrower shall provide telephonic notice

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to the Administrative Agent, followed promptly by a written Notice of Continuation/Conversion, in the form of Exhibit 2.6 setting forth (i) whether the Borrower wishes to continue or convert such Loans, (ii) if the request is to continue a Eurodollar Loan or convert a Base Rate Loan to a Eurodollar Loan, the Interest Period applicable thereto and (iii) whether the Loans to be continued or converted are Revolving Loans or Term Loans. Notwithstanding anything herein to the contrary, (A) except as provided in Section 3.11, Eurodollar Loans may only be continued or converted into Base Rate Loans on the last day of the Interest Period applicable thereto, (B) Eurodollar Loans may not be continued nor may Base Rate Loans be converted into Eurodollar Loans during the existence and continuation of a Default or an Event of Default, (C) any request to continue a Eurodollar Loan that fails to comply with the terms hereof or any failure to request a continuation of a Eurodollar Loan at the end of an Interest Period shall constitute a conversion to a Base Rate Loan on the last day of the applicable Interest Period and (D) any failure to state the Interest Period with respect to the continuation of a Eurodollar Loan or the conversion of a Base Rate Loan to a Eurodollar Loan shall constitute a request for a one month Interest Period. It is understood and agreed that Competitive Bid Loans and Swing Line Loans may not be continued or converted.

2.7 Minimum Amounts.

Each request for a borrowing, conversion or continuation shall be subject to the requirements that (a) each Eurodollar Loan and each Competitive Bid Loan shall be in a minimum amount of $10,000,000 and in integral multiples of $1,000,000 in excess thereof, (b) each Base Rate Loan shall be in a minimum amount of the lesser of $5,000,000 (and in integral multiples of $1,000,000 in excess thereof) or the remaining amount available under the Revolving Committed Amount or the remaining amount of outstanding Term Loans, as applicable, (c) each Swing Line Loan shall be in a minimum amount of the lesser of $1,000,000 (and in integral multiples of $100,000 in excess thereof) or the remaining amount available under the Swing Line Committed Amount and (d) no more than ten Eurodollar Loans shall be outstanding hereunder at any one time. For the purposes of this Section 2.7, all Eurodollar Loans with the same Interest Periods that begin and end on the same date shall be considered as one Eurodollar Loan, but Eurodollar Loans with different Interest Periods, even if they begin on the same date, shall be considered as separate Eurodollar Loans.

SECTION 3

GENERAL PROVISIONS APPLICABLE
TO LOANS AND LETTERS OF CREDIT

3.1 Interest.

(a) Interest Rate. Subject to Section 3.1(b), (i) all Base Rate Loans shall accrue interest at the Base Rate, (ii) all Eurodollar Loans shall accrue interest at the Adjusted Eurodollar Rate, (iii) all Swing Line Loans shall accrue interest at the Base Rate and (iv) all Competitive Bid Loans shall accrue interest at the applicable Competitive Bid Rate with respect to each Competitive Bid Loan.

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(b) Default Rate of Interest. Upon the occurrence, and during the continuation, of an Event of Default pursuant to Section 9.1(a), the principal of and, to the extent permitted by law, interest on the Loans and any other amounts owing hereunder or under the other Credit Documents (including without limitation fees and expenses) shall bear interest, payable on demand, at a per annum rate equal to 2% plus the rate which would otherwise be applicable (or if no rate is applicable, then the Base Rate plus two percent (2%) per annum).

(c) Interest Payments. Interest on Loans shall be due and payable in arrears on each Interest Payment Date.

3.2 Place and Manner of Payments.

All payments of principal, interest, fees, expenses and other amounts to be made by a Credit Party under this Credit Agreement shall be made unconditionally and without any setoff, deduction, counterclaim, defense, recoupment or withholding of any kind and received not later than 2:00 p.m. on the date when due, in Dollars and in immediately available funds, by the Administrative Agent at the Agency Services Address. Payments received after such time shall be deemed to have been received on the next Business Day. The Borrower shall, at the time it makes any payment under this Credit Agreement, specify to the Administrative Agent the Loans, Letters of Credit, fees or other amounts payable by the Borrower hereunder to which such payment is to be applied (and in the event that it fails to specify, or if such application would be inconsistent with the terms hereof, the Administrative Agent shall, subject to
Section 3.7, distribute such payment to the Lenders in such manner as the Administrative Agent may reasonably deem appropriate). The Administrative Agent will distribute such payments to the Lenders on the same Business Day if any such payment is received at or before 2:00 p.m.; otherwise the Administrative Agent will distribute such payment to the Lenders on the next succeeding Business Day. Whenever any payment hereunder shall be stated to be due on a day which is not a Business Day, the due date thereof shall be extended to the next succeeding Business Day (subject to accrual of interest and fees for the period of such extension), except that, in the case of Eurodollar Loans (or interest payable with respect thereto), if the extension would cause the payment to be made in the next following calendar month, then such payment shall instead be made on the next preceding Business Day.

3.3 Prepayments.

(a) Voluntary Prepayments. The Borrower shall have the right to prepay Loans in whole or in part from time to time without premium or penalty; provided, however, that (i) Eurodollar Loans may only be prepaid on three Business Days' prior written notice to the Administrative Agent, (ii) each such partial prepayment of Eurodollar Loans or Base Rate Loans shall be in the minimum principal amount of $5,000,000 and integral multiples of $1,000,000, (iii) each such partial prepayment of Swing Line Loans shall be in the minimum principal amount of $1,000,000 and integral multiples of $100,000, (iv) Competitive Bid Loans may not be prepaid unless a breakage fee equal to the amount of damages suffered by the Lender (other than loss of anticipated profits) whose Competitive Bid Loan is prepaid is paid to such Lender (as determined by such Lender in its reasonable discretion) and (v) voluntary prepayments of Term Loans shall be applied first to the next scheduled principal payment and then to the remaining scheduled principal payments pro rata among

40

all such remaining payments. Amounts prepaid pursuant to this Section 3.3(a) shall be applied as the Borrower may elect; however, if the Borrower fails to specify, such prepayment will be applied in the manner set forth in Section 3.3(c) below. All prepayments under this
Section 3.3(a) shall be subject to Section 3.14

(b) Mandatory Prepayments. If at any time (i) the sum of the aggregate amount of outstanding Revolving Loans plus the aggregate amount of outstanding LOC Obligations plus the aggregate amount of outstanding Competitive Bid Loans plus the aggregate amount of outstanding Swing Line Loans exceeds the Revolving Committed Amount,
(ii) the aggregate amount of outstanding Swing Line Loans exceeds the Swing Line Committed Amount, (iii) the aggregate amount of outstanding LOC Obligations exceeds the LOC Committed Amount or (iv) the amount of outstanding Competitive Bid Loans exceeds $200,000,000, the Borrower shall immediately make a principal payment to the Administrative Agent (or with respect to LOC Obligations an amount to be held as cash collateral) in a manner and in an amount necessary to be in compliance with Sections 2.1, 2.2, 2.3 and 2.4, as applicable and as directed by the Administrative Agent (any such prepayment with respect to clause
(i) above to be applied as set forth in Section 3.3(c) below).

(c) Application of Prepayments. All amounts paid pursuant to
Section 3.3(a), if the Borrower has not otherwise elected an application of such amounts, shall be applied first to Term Loans (first to the next scheduled principal payment and then to the remaining scheduled principal payments pro rata among all such remaining payments), second to Swing Line Loans, third to Revolving Loans (first to Base Rate Loans and then to Eurodollar Loans in direct order of Interest Period Maturities), fourth, pro rata, to Competitive Bid Loans and fifth to a cash collateral account in respect of LOC Obligations. All amounts required to be prepaid pursuant to Section 3.3(b)(i) shall be applied first to Revolving Loans (first to Base Rate Loans and then to Eurodollar Loans in direct order of Interest Period maturities), second to Swing Line Loans, third, pro rata, to Competitive Bid Loans and fourth to a cash collateral account in respect of LOC Obligations. All prepayments hereunder shall be subject to Section 3.14.

(d) Revision of Amortization Schedule. If the Borrower makes a prepayment in accordance with this Section 3.3, the Administrative Agent shall recalculate the outstanding principal amount of the Term Loans following such prepayment, reschedule the remaining amortization payments as agreed by the Borrower, and promptly distribute to the Borrower and to each of the Lenders a revised version of the schedule which appears in Section 2.5(c).

3.4 Fees.

(a) Facility Fees. In consideration of the Revolving Committed Amount being made available by the Lenders hereunder, the Borrower agrees to pay to the Administrative Agent, for the pro rata benefit of each Lender (based on such Lender's Revolving Loan Commitment Percentage of the Revolving Committed Amount), a per annum fee equal to the Applicable Percentage for Facility Fees (the "Facility Fees"). The Facility Fees shall

41

commence to accrue on the Effective Date and shall be due and payable in arrears on the last day of each fiscal quarter (beginning with the fiscal quarter ending September 30, 2001) of the Borrower (as well as on the Maturity Date and on any date that the Revolving Committed Amount is reduced) for the immediately preceding fiscal quarter, or portion thereof, (or with respect to the fiscal quarter ending September 30, 2001, for the period from the Closing Date to September 30, 2001).

(b) Letter of Credit Fees.

(i) Letter of Credit Fees. In consideration of the issuance of Letters of Credit hereunder, the Borrower agrees to pay to the Issuing Lender, for the pro rata benefit of each Lender (based on each Lender's Commitment Percentage), a per annum fee (the "Letter of Credit Fees") equal to the Applicable Percentage for the Letter of Credit Fees on the average daily maximum amount available to be drawn under each such Letter of Credit from the date of issuance to the date of expiration. The Letter of Credit Fees will be payable in arrears on the last day of each fiscal quarter (beginning with the fiscal quarter ending September 30, 2001) of the Borrower (as well as on the Maturity Date) for the immediately preceding fiscal quarter, or portion thereof, (or with respect to the fiscal quarter ending September 30, 2001, for the period from the Closing Date to September 30, 2001).

(ii) Issuing Lender Fees. In addition to the Letter of Credit Fees payable pursuant to subsection (i) above, the Borrower shall pay to the Issuing Lender for its own account, without sharing by the other Lenders, (A) the customary, incidental and/or out of pocket charges from time to time to the Issuing Lender for its services in connection with the issuance, amendment, payment, transfer, administration, cancellation and conversion of, and drawings under, Letters of Credit and (B) a letter of credit fronting fee of .125% per annum of the face amount of each Letter of Credit (collectively, the "Issuing Lender Fees"), such fee to be payable quarterly on the last day of each fiscal quarter of the Borrower (beginning with the fiscal quarter ending September 30, 2001) and on the Maturity Date.

(c) Administrative Fees. The Borrower agrees to pay to the Administrative Agent, for its own account, an annual fee as agreed to between the Borrower and the Administrative Agent.

3.5 Payment in full at Maturity.

On the Maturity Date, the entire outstanding principal balance of all Loans and all LOC Obligations, together with accrued but unpaid interest and all other sums owing with respect thereto, shall be due and payable in full, unless accelerated sooner pursuant to Section 9.

3.6 Computations of Interest and Fees.

(a) Except for Base Rate Loans and Swing Line Loans that are based upon the Prime Rate, in which case interest shall be computed on the basis of the actual number of

42

days elapsed over a year of 365 or 366 days, as the case may be, all computations of interest and fees hereunder shall be made on the basis of the actual number of days elapsed over a year of 360 days. Interest shall accrue from and include the date of borrowing (or continuation or conversion) but exclude the date of payment.

(b) It is the intent of the Lenders and the Credit Parties to conform to and contract in strict compliance with applicable usury law from time to time in effect. All agreements between the Lenders and the Credit Parties are hereby limited by the provisions of this paragraph which shall override and control all such agreements, whether now existing or hereafter arising and whether written or oral. In no way, nor in any event or contingency (including but not limited to prepayment or acceleration of the maturity of any obligation), shall the interest taken, reserved, contracted for, charged, or received under this Credit Agreement, under the Notes or otherwise, exceed the maximum nonusurious amount permissible under applicable law. If, from any possible construction of any of the Credit Documents or any other document, interest would otherwise be payable in excess of the maximum nonusurious amount, any such construction shall be subject to the provisions of this paragraph and such documents shall be automatically reduced to the maximum nonusurious amount permitted under applicable law, without the necessity of execution of any amendment or new document. If any Lender shall ever receive anything of value which is characterized as interest on the Loans under applicable law and which would, apart from this provision, be in excess of the maximum nonusurious amount, an amount equal to the amount which would have been excessive interest shall, without penalty, be applied to the reduction of the principal amount owing on the Loans and not to the payment of interest, or refunded to the Borrower or the other payor thereof if and to the extent such amount which would have been excessive exceeds such unpaid principal amount of the Loans. The right to demand payment of the Loans or any other Indebtedness evidenced by any of the Credit Documents does not include the right to accelerate the payment of any interest which has not otherwise accrued on the date of such demand, and the Lenders do not intend to charge or receive any unearned interest in the event of such demand. All interest paid or agreed to be paid to the Lenders with respect to the Loans shall, to the extent permitted by applicable law, be amortized, prorated, allocated, and spread throughout the full stated term (including any renewal or extension) of the Loans so that the amount of interest on account of such Indebtedness does not exceed the maximum nonusurious amount permitted by applicable law.

3.7 Pro Rata Treatment.

Except to the extent otherwise provided herein:

(a) Revolving Loans and Term Loans. Each Revolving Loan borrowing (including, without limitation, each Mandatory Borrowing), each payment or prepayment of principal of any Revolving Loan or Term Loan, each payment of fees (other than the Issuing Lender Fees retained by the Issuing Lender for its own account and the Administrative Fees retained by the Administrative Agent for its own account), each reduction of the Revolving Committed Amount, and each conversion or continuation of any Revolving Loan or the Term Loans, shall (except as otherwise provided in Section 3.11) be allocated pro rata

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among the relevant Lenders in accordance with the respective Revolving Loan Commitment Percentages or Term Loan Commitment Percentages of such Lenders, as applicable, (or, if the Commitments of such Lenders have expired or been terminated, in accordance with the respective principal amounts of the outstanding Revolving Loans, Term Loans and Participation Interests of such Lenders); provided that, if any Lender shall have failed to pay its applicable pro rata share of any Revolving Loan or Term Loan, then any amount to which such Lender would otherwise be entitled pursuant to this subsection (a) shall instead be payable to the Administrative Agent until the share of such Loan not funded by such Lender has been repaid; provided further, that in the event any amount paid to any Lender pursuant to this subsection (a) is rescinded or must otherwise be returned by the Administrative Agent, each Lender shall, upon the request of the Administrative Agent, repay to the Administrative Agent the amount so paid to such Lender, with interest for the period commencing on the date such payment is returned by the Administrative Agent until the date the Administrative Agent receives such repayment at a rate per annum equal to, during the period to but excluding the date two Business Days after such request, the Federal Funds Rate, and thereafter, the Base Rate plus two percent (2%) per annum; and

(b) Letters of Credit. Each payment of unreimbursed drawings in respect of LOC Obligations shall be allocated to each Participant pro rata in accordance with its Revolving Loan Commitment Percentage; provided that, if any Participant shall have failed to pay its applicable pro rata share of any drawing under any Letter of Credit, then any amount to which such Participant would otherwise be entitled pursuant to this subsection (b) shall instead be payable to the Issuing Lender until the share of such unreimbursed drawing not funded by such Lender has been repaid; provided further, that in the event any amount paid to any Participant pursuant to this subsection (b) is rescinded or must otherwise be returned by the Issuing Lender, each Participant shall, upon the request of the Issuing Lender, repay to the Administrative Agent for the account of the Issuing Lender the amount so paid to such Participant, with interest for the period commencing on the date such payment is returned by the Issuing Lender until the date the Issuing Lender receives such repayment at a rate per annum equal to, during the period to but excluding the date two Business Days after such request, the Federal Funds Rate, and thereafter, the Base Rate plus two percent (2%) per annum.

(c) Swing Line Loans. The Swing Line Lender shall receive, for its own account, all payments or prepayments of principal and interest with respect to the Swing Line Loans; provided, however, upon the funding of the Participants' participation interests with respect to a Swing Line Loan pursuant to Section 2.3(c), such Participants shall be entitled to receive their pro rata share of any payment or prepayment of principal and interest with respect to such Swing Line Loan.

3.8 Sharing of Payments.

The Lenders agree among themselves that, except to the extent otherwise provided herein, in the event that any Lender shall obtain payment in respect of any Loan, unreimbursed drawing with respect to any LOC Obligations or any other obligation owing to such Lender under this Credit Agreement through the exercise of a right of setoff, banker's lien or counterclaim, or pursuant to a

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secured claim under Section 506 of the Bankruptcy Code or other security or interest arising from, or in lieu of, such secured claim, received by such Lender under any applicable bankruptcy, insolvency or other similar law or otherwise, or by any other means, in excess of its pro rata share of such payment as provided for in this Credit Agreement, such Lender shall promptly pay in cash or purchase from the other Lenders a participation in such Loans, LOC Obligations, and other obligations in such amounts, and make such other adjustments from time to time, as shall be equitable to the end that all Lenders share such payment in accordance with their respective ratable shares as provided for in this Credit Agreement. The Lenders further agree among themselves that if payment to a Lender obtained by such Lender through the exercise of a right of setoff, banker's lien, counterclaim or other event as aforesaid shall be rescinded or must otherwise be restored, each Lender which shall have shared the benefit of such payment shall, by payment in cash or a repurchase of a participation theretofore sold, return its share of that benefit
(together with its share of any accrued interest payable with respect thereto)
to each Lender whose payment shall have been rescinded or otherwise restored. The Borrower agrees that any Lender so purchasing such a participation may, to the fullest extent permitted by law, exercise all rights of payment, including setoff, banker's lien or counterclaim, with respect to such participation as fully as if such Lender were a holder of such Loan, LOC Obligation or other obligation in the amount of such participation. Except as otherwise expressly provided in this Credit Agreement, if any Lender or the Administrative Agent shall fail to remit to any other Lender an amount payable by such Lender or the Administrative Agent to such other Lender pursuant to this Credit Agreement on the date when such amount is due, such payments shall be made together with interest thereon for each date from the date such amount is due until the date such amount is paid to the Administrative Agent or such other Lender at a rate per annum equal to the Federal Funds Rate. If under any applicable bankruptcy, insolvency or other similar law, any Lender receives a secured claim in lieu of a setoff to which this Section 3.8 applies, such Lender shall, to the extent practicable, exercise its rights in respect of such secured claim in a manner consistent with the rights of the Lenders under this Section 3.8 to share in the benefits of any recovery on such secured claim.

3.9 Capital Adequacy/Regulation D.

(a) If, after the date thereof, any Lender determines that the introduction after the Closing Date of any law, rule or regulation or other Requirement of Law regarding capital adequacy or any change therein or in the interpretation thereof, or compliance by such Lender (or its Lending Office) therewith, has or would have the effect of reducing the rate of return on the capital or assets of such Lender or any corporation controlling such Lender as a consequence of such Lender's obligations hereunder (taking into consideration its policies with respect to capital adequacy and such Lender's desired return on capital), then from time to time upon demand of such Lender (with a copy of such demand to the Administrative Agent), the Borrower shall pay to such Lender such additional amounts as will compensate such Lender for such reduction.

(b) The Borrower shall pay to each Lender, as long as such Lender shall be required under regulations of the Board of Governors of the Federal Reserve System of the United States of America to maintain reserves with respect to liabilities or assets consisting of or including Eurocurrency funds or deposits (currently known as "Eurocurrency liabilities"), additional interest on the unpaid principal amount of each Eurodollar Loan

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equal to (i) (A) the applicable Eurodollar Rate divided by (B) one minus the Eurodollar Reserve Percentage minus (ii) the applicable Eurodollar Rate. Such additional interest shall be due and payable on each date on which interest is payable on such Loan; provided the Borrower shall have received at least five days' prior notice (with a copy to the Administrative Agent) of such additional interest from such Lender. If a Lender fails to give notice five days prior to the relevant Interest Payment Date, such additional interest shall be due and payable five days from the receipt by the Borrower of such notice.

3.10 Inability To Determine Interest Rate.

If the Administrative Agent determines (which determination shall be conclusive and binding upon the Borrower) in connection with any request for a Eurodollar Loan or a conversion to or continuation thereof that (a) Dollar deposits are not being offered to banks in the applicable offshore Dollar market for the applicable amount and Interest Period of such Eurodollar Loan, (b) adequate and reasonable means do not exist for determining the Eurodollar Rate for such Eurodollar Loan, or (c) the Eurodollar Rate for such Eurodollar Loan does not adequately and fairly reflect the cost to the Lenders of funding such Eurodollar Loan, the Administrative Agent will promptly notify the Borrower and all the Lenders. Thereafter, the obligation of the Lenders to make or maintain Eurodollar Loans shall be suspended until the Administrative Agent revokes such notice. Upon receipt of such notice, the Borrower may revoke any pending Notice of Borrowing or Notice of Continuation/Conversion with respect to Eurodollar Loans or, failing that, will be deemed to have converted such request into a request for a borrowing of or conversion into a Base Rate Loan in the amount specified therein.

3.11 Illegality.

If any Lender determines that any Requirement of Law has made it unlawful, or that any Governmental Authority has asserted that it is unlawful, for any Lender or its applicable Lending Office to make, maintain or fund Eurodollar Loans, or materially restricts the authority of such Lender to purchase or sell, or to take deposits of, Dollars in the applicable offshore Dollar market, or to determine or charge interest rates based upon the Eurodollar Rate, then, on notice thereof by such Lender to the Borrower through the Administrative Agent, any obligation of such Lender to make or continue Eurodollar Loans or to convert Base Rate Loans to Eurodollar Loans shall be suspended until such Lender notifies the Administrative Agent and the Borrower that the circumstances giving rise to such determination no longer exist. Upon receipt of such notice, the Borrower shall, upon demand from such Lender (with a copy to the Administrative Agent), prepay or, if applicable, convert all Eurodollar Loans of such Lender to Base Rate Loans, either on the last day of the Interest Period thereof, if such Lender may lawfully continue to maintain such Eurodollar Loans to such day, or immediately, if such Lender may not lawfully continue to maintain such Eurodollar Loans. Upon any such prepayment or conversion, the Borrower shall also pay interest on the amount so prepaid or converted, together with any amounts due with respect thereto pursuant to
Section 3.14. Each Lender agrees to designate a different Lending Office if such designation will avoid the need for such notice and will not, in the good faith judgment of such Lender, otherwise be materially disadvantageous to such Lender.

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3.12 Requirements of Law.

If any Lender determines that as a result of the introduction of or any change in, or in the interpretation of, any Requirement of Law, or such Lender's compliance therewith, there shall be any increase in the cost to such Lender of agreeing to make or making, funding or maintaining Eurodollar Loans or (as the case may be) issuing or participating in Letters of Credit, or a reduction in the amount received or receivable by such Lender in connection with any of the foregoing (excluding for purposes of this subsection (a) any such increased costs or reduction in amount resulting from (i) Taxes or Other Taxes (as to which Section 3.13 shall govern) and (ii) reserve requirements utilized in the determination of the Eurodollar Rate), then from time to time, within 10 days of demand of such Lender (with a copy of such demand to the Administrative Agent), the Borrower shall pay to such Lender such additional amounts as will compensate such Lender for such increased cost or reduction in yield.

3.13 Taxes.

(a) Any and all payments by a Credit Party to or for the account of the Administrative Agent or any Lender under any Credit Document shall be made free and clear of and without deduction for any and all present or future income, stamp or other taxes, duties, levies, imposts, deductions, assessments, fees, withholdings or similar charges, and all liabilities with respect thereto, but excluding, in the case of the Administrative Agent and each Lender, taxes imposed on or measured by its net income, and franchise taxes imposed on it (in lieu of net income taxes), by the jurisdiction (or any political subdivision thereof) under the laws of which the Administrative Agent or such Lender, as the case may be, is organized or maintains its Lending Office (all such non-excluded present or future income, stamp or other taxes, duties, levies, imposts, deductions, assessments, fees, withholdings or similar charges, and liabilities being hereinafter referred to as "Taxes"). If a Credit Party shall be required by any Requirement of Law to deduct any Taxes from or in respect of any sum payable under any Credit Document to the Administrative Agent or any Lender, (i) the sum payable shall be increased as necessary so that after making all required deductions (including deductions applicable to additional sums payable under this Section 3.13(a)), the Administrative Agent or such Lender, as the case may be, receives an amount equal to the sum it would have received had no such deductions been made, (ii) such Credit Party shall make such deductions, (iii) such Credit Party shall pay the full amount deducted to the relevant taxation authority or other Governmental Authority in accordance with applicable Requirements of Law, and (iv) within 30 days after the date of such payment, such Credit Party shall furnish to the Administrative Agent (which shall forward the same to such Lender) the original or a certified copy of a receipt evidencing payment thereof, to the extent such receipt is issued therefor, or other written proof of payment thereof that is reasonably satisfactory to the Administrative Agent.

(b) In addition, each Credit Party agrees to pay any and all present or future stamp, court or documentary taxes and any other excise or property taxes or charges or similar levies which arise from any payment made under any Credit Document or from

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the execution, delivery, performance, enforcement or registration of, or otherwise with respect to, any Credit Document (hereinafter referred to as "Other Taxes").

(c) If a Credit Party shall be required to deduct or pay any Taxes or Other Taxes from or in respect of any sum payable under any Credit Document to the Administrative Agent or any Lender, such Credit Party shall also pay to the Administrative Agent (for the account of such Lender) or to such Lender, at the time interest is paid, such additional amount that such Lender reasonably specifies by written notice to such Credit Party as necessary to preserve the after-tax yield (after factoring in all taxes, including taxes imposed on or measured by net income) such Lender would have received if such Taxes or Other Taxes had not been imposed; provided that if such Lender fails to provide such notice to such Credit Party before the date which is five days prior to the date such interest is paid, such Credit Party shall pay at the time such interest is paid such amount as such Credit Party reasonably estimates will preserve such Lender's after-tax yield (after factoring in only such Taxes or Other Taxes) and pay the balance within five days after receiving such notice.

(d) Each Credit Party agrees to indemnify the Administrative Agent and each Lender for (i) the full amount of Taxes and Other Taxes (including any Taxes or Other Taxes imposed or asserted by any jurisdiction on amounts payable under this Section 3.13(d)) paid by the Administrative Agent and such Lender, and (ii) any liability (including penalties, interest and reasonable expenses) arising therefrom or with respect thereto.

(e) In the case of any payment hereunder or under any other Credit Document by or on behalf of a Credit Party through an account or branch outside the United States, or on behalf of a Credit Party by a payor that is not a United States person, if such Credit Party determines that no taxes are payable in respect thereof, such Credit Party shall furnish, or shall cause such payor to furnish, to the Administrative Agent, an opinion of counsel reasonably acceptable to the Administrative Agent stating that such payment is exempt from Taxes. For purposes of this subsection (e), the terms "United States" and "United States person" shall have the meanings specified in Section 7701 of the Code.

(f) Each Lender that is a foreign corporation, foreign partnership or foreign trust within the meaning of the Code shall deliver to the Administrative Agent, prior to receipt of any payment subject to withholding under the Code, two duly signed completed copies of either IRS Form W-8BEN or any successor thereto (relating to such Lender and entitling it to an exemption from, or reduction of, withholding tax on all payments to be made to such Lender by the Credit Parties pursuant to this Agreement) or IRS Form W-8ECI or any successor thereto (relating to all payments to be made to such Lender by a Credit Party pursuant to this Agreement), as appropriate, or such other evidence satisfactory to the Borrower and the Administrative Agent that such Lender is entitled to an exemption from, or reduction of, United States withholding tax. Thereafter and from time to time, each such Lender shall (i) promptly submit to the Administrative Agent such additional duly completed and signed copies of one of such forms (or such successor forms as shall be adopted from time to time by the relevant United States

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taxing authorities), as appropriate, as may reasonably be requested by the Borrower or the Administrative Agent and then be available under then current United States laws and regulations to avoid, or such evidence as is satisfactory to the Borrower and the Administrative Agent of any available exemption from or reduction of, United States withholding taxes in respect of all payments to be made to such Lender by the Borrower pursuant to this Agreement, (ii) promptly notify the Agent of any change in circumstances which would modify or render invalid any claimed exemption or reduction, and (iii) take such steps as shall not be materially disadvantageous to it, in the reasonable judgment of such Lender, and as may be reasonably necessary (including the re-designation of its Lending Office) to avoid any Requirement of Law that the Credit Parties make any deduction or withholding for taxes from amounts payable to such Lender. If the forms or other evidence provided by such Lender at the time such Lender first becomes a party to this Agreement indicate a United States interest withholding tax rate in excess of zero, withholding tax at such rate shall be considered excluded from Taxes unless and until such Lender provides the appropriate forms certifying that a lesser rate applies, whereupon withholding tax at such lesser rate only shall be considered excluded from Taxes for periods governed by such forms; provided, however, that, if at the date of any assignment pursuant to which a Lender becomes a party to this Agreement, the Lender assignor was entitled to payments under subsection (a) of this Section 3.13 in respect of United States withholding tax with respect to interest paid at such date, then, to such extent, the term Taxes shall include (in addition to withholding taxes that may be imposed in the future or other amounts otherwise includable in Taxes) United States withholding tax, if any, applicable with respect to the Lender assignee on such date. If such Lender fails to deliver the above forms or other evidence, then the Administrative Agent may withhold from any interest payment to such Lender an amount equal to the applicable withholding tax imposed by Sections 1441 and 1442 of the Code, without reduction. If any Governmental Authority asserts that the Administrative Agent did not properly withhold any tax or other amount from payments made in respect of such Lender, such Lender shall indemnify the Administrative Agent therefor, including all penalties and interest, any taxes imposed by any jurisdiction on the amounts payable to the Administrative Agent under this Section 3.13(f), and costs and expenses (including Attorney Costs) of the Administrative Agent. For any period with respect to which a Lender has failed to provide the Borrower with the above forms or other evidence (other than if such failure is due to a change in the applicable law, or in the interpretation or application thereof, occurring after the date on which such form or other evidence originally was required to be provided or if such form or other evidence otherwise is not required, such Lender shall not be entitled to indemnification under subsection
(a) or (c) of this Section 3.13 with respect to Taxes imposed by the United States by reason of such failure; provided, however, that should a Lender become subject to Taxes because of its failure to deliver such form or other evidence required hereunder, the Borrower shall take such steps as such Lender shall reasonably request to assist such Lender in recovering such Taxes. (v) The obligation of the Lenders under this
Section 3.13(f) shall survive the payment of all Obligations and the resignation or replacement of the Administrative Agent.

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(g) In the event that an additional payment is made under
Section 3.13(a) or (c) for the account of any Lender and such Lender, in its reasonable judgment, determines that it has finally and irrevocably received or been granted a credit against or release or remission for, or repayment of, any tax paid or payable by it in respect of or calculated with reference to the deduction or withholding giving rise to such payment, such Lender shall, to the extent that it determines that it can do so without prejudice to the retention of the amount of such credit, relief, remission or repayment, pay to the Borrower such amount as such Lender shall, in its reasonable judgment, have determined to be attributable to such deduction or withholding and which will leave such Lender (after such payment) in no worse position than it would have been in if the Borrower had not been required to make such deduction or withholding. Nothing herein contained shall interfere with the right of a Lender to arrange its tax affairs in whatever manner it thinks fit nor oblige any Lender to claim any tax credit or to disclose any information relating to its tax affairs or any computations in respect thereof or require any Lender to do anything that would prejudice its ability to benefit from any other credits, reliefs, remissions or repayments to which it may be entitled.

3.14 Compensation.

Upon the written demand of any Lender, the Borrower shall promptly compensate such Lender for and hold such Lender harmless from any loss, cost or expense incurred by it as a result of:

(a) any continuation, conversion, payment or prepayment of any Eurodollar Loan on a day other than the last day of the Interest Period for such Eurodollar Loan (whether voluntary, mandatory, automatic, by reason of acceleration, or otherwise); or

(b) any failure by the Borrower (for a reason other than the failure of such Lender to make a Eurodollar Loan) to prepay, borrow, continue or convert any Eurodollar Loan on the date or in the amount previously requested by the Borrower; or

(c) any repayment of a Competitive Bid Loan on a date which is not the last day of the Interest Period applicable thereto or any failure by the Borrower to borrow a Competitive Bid Loan on the date in the amount previously agreed to by the Borrower.

The amount each such Lender shall be compensated pursuant to this Section 3.14 shall include, without limitation, (i) any loss incurred by such Lender in connection with the re-employment of funds prepaid, repaid, not borrowed or paid, as the case may be and (ii) any reasonable out-of-pocket expenses (including Attorney Costs) incurred and reasonably attributable thereto.

For purposes of calculating amounts payable by the Borrower to the Lenders under this Section 3.14, each Lender may deem that it funded each Eurodollar Loan made by it at the Eurodollar Rate for such Eurodollar Loan by a matching deposit or other borrowing in the applicable offshore Dollar interbank market for a comparable amount and for a comparable period, whether or not such Eurodollar Loan was in fact so funded.

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3.15 Determination and Survival of Provisions.

All determinations by the Administrative Agent or a Lender of amounts owing under Sections 3.9 through 3.14, inclusive, shall, absent manifest error, be conclusive and binding on the parties hereto. In determining such amount, the Administrative Agent or such Lender may use any reasonable averaging and attribution methods. Section 3.9 through 3.14, inclusive, shall survive the termination of this Credit Agreement and the payment of all Credit Party Obligations.

3.16 Notification by Lenders.

Subject to Section 3.13(c), each Lender shall notify the Borrower (and any applicable Credit Party) of any event that will entitle such Lender to compensation under Section 3.9, 3.12, 3.13 or 3.14 as promptly as practicable, but in any event within 90 days after such Lender obtains actual knowledge thereof; provided, however, that if any Lender fails to give such notice within 90 days after it obtains actual knowledge of such an event, such Lender shall, with respect to compensation payable pursuant to Section 3.9, 3.12, 3.13 or 3.14 in respect of any costs resulting from such event, only be entitled to payment under Section 3.9, 3.12, 3.13 or 3.14 for costs incurred from and after the date 90 days prior to the date that such Lender gives such notice. If requested by the Borrower, each Lender will furnish to Borrower within ten Business Days of the time the Lender requests compensation under Section 3.9, 3.12, 3.13 or 3.14, a certificate setting forth the basis, amount and reasonable detail of computation of each request by such Lender for compensation under Section 3.9, 3.12, 3.13 or 3.14, which certificate shall, except for demonstrable error, be final, conclusive and binding for all purposes.

3.17 Mitigation; Mandatory Assignment.

Each Lender shall use reasonable efforts to avoid or mitigate any increased cost or suspension of the availability of an interest rate under Sections 3.9 through 3.14 above to the greatest extent practicable (including transferring the Loans to another Lending Office or Affiliate of a Lender) unless, in the reasonable opinion of such Lender, such efforts would be likely to have an adverse effect upon it. In the event a Lender makes a request to the Borrower for additional payments in accordance with Section 3.9, 3.11, 3.12, 3.13 or 3.14, then, provided that no Default or Event of Default has occurred and is continuing at such time, the Borrower may, at its own expense (such expense to include, without limitation, any transfer fee payable to the Administrative Agent under Section 11.3(b)) and in its sole discretion, require such Lender to transfer and assign in whole (but not in part), without recourse (in accordance with and subject to the terms and conditions of Section 11.3(b)), all of its interests, rights and obligations under this Credit Agreement to an Eligible Assignee which shall assume such assigned obligations (which assignee may be another Lender, if a Lender accepts such assignment); provided that (a) such assignment shall not conflict with any law, rule or regulation or order of any court or other Governmental Authority and (b) the Borrower or such assignee shall have paid to the assigning Lender in immediately available funds the principal of and interest accrued to the date of such payment on the portion of the Loans hereunder held by such assigning Lender and all other amounts owed to such assigning Lender hereunder, including amounts owed pursuant to Sections 3.9 through 3.14 hereof.

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SECTION 4

GUARANTY

4.1 Guaranty of Payment.

Subject to Section 4.7 below, each of the Guarantors hereby, jointly and severally, unconditionally guarantees to each Lender and the Administrative Agent the prompt payment of the Credit Party Obligations in full when due (whether at stated maturity, as a mandatory prepayment, by acceleration or otherwise) and the timely performance of all other obligations under the Credit Documents. This Guaranty is a guaranty of payment and not of collection and is a continuing guaranty and shall apply to all Credit Party Obligations whenever arising.

4.2 Obligations Unconditional.

The obligations of the Guarantors hereunder are absolute and unconditional, irrespective of the value, genuineness, validity, regularity or enforceability of any of the Credit Documents, or any other agreement or instrument referred to therein, to the fullest extent permitted by applicable law, irrespective of any other circumstance whatsoever which might otherwise constitute a legal or equitable discharge or defense of a surety or guarantor. Each Guarantor agrees that this Guaranty may be enforced by the Lenders without the necessity at any time of resorting to or exhausting any other security or collateral and without the necessity at any time of having recourse to the Notes or any other of the Credit Documents or any collateral, if any, hereafter securing the Credit Party Obligations or otherwise and each Guarantor hereby waives the right to require the Lenders to proceed against the Borrower or any other Person (including a co-guarantor) or to require the Lenders to pursue any other remedy or enforce any other right. Each Guarantor further agrees that it shall have no right of subrogation, indemnity, reimbursement or contribution against the Borrower or any other Guarantor of the Credit Party Obligations for amounts paid under this Guaranty until such time as the Lenders have been paid in full, all Commitments under the Credit Agreement have been terminated. Each Guarantor further agrees that nothing contained herein shall prevent the Lenders from suing on the Notes or any of the other Credit Documents or foreclosing its security interest in or Lien on any collateral, if any, securing the Credit Party Obligations or from exercising any other rights available to it under this Credit Agreement, the Notes, any other of the Credit Documents, or any other instrument of security, if any, and the exercise of any of the aforesaid rights and the completion of any foreclosure proceedings shall not constitute a discharge of any of any Guarantor's obligations hereunder; it being the purpose and intent of each Guarantor that its obligations hereunder shall be absolute, independent and unconditional under any and all circumstances. Neither any Guarantor's obligations under this Guaranty nor any remedy for the enforcement thereof shall be impaired, modified, changed or released in any manner whatsoever by an impairment, modification, change, release or limitation of the liability of the Borrower or by reason of the bankruptcy or insolvency of the Borrower. Each Guarantor waives any and all notice of the creation, renewal, extension or accrual of any of the Credit Party Obligations and notice of or proof of reliance of by the Administrative Agent or any Lender upon this Guaranty or acceptance of this Guaranty. The Credit Party Obligations, and any of them, shall conclusively be deemed to have been created, contracted or incurred, or renewed, extended, amended or waived, in reliance upon

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this Guaranty. All dealings between the Borrower and any of the Guarantors, on the one hand, and the Administrative Agent and the Lenders, on the other hand, likewise shall be conclusively presumed to have been had or consummated in reliance upon this Guaranty. The Guarantors further agree to all rights of set-off as set forth in Section 11.2.

4.3 Modifications.

Each Guarantor agrees that (a) all or any part of the collateral, if any, now or hereafter held for the Credit Party Obligations, if any, may be exchanged, compromised or surrendered from time to time; (b) the Lenders shall not have any obligation to protect, perfect, secure or insure any such security interests, liens or encumbrances now or hereafter held, if any, for the Credit Party Obligations or the properties subject thereto; (c) the time or place of payment of the Credit Party Obligations may be changed or extended, in whole or in part, to a time certain or otherwise, and may be renewed or accelerated, in whole or in part; (d) the Borrower and any other party liable for payment under the Credit Documents may be granted indulgences generally; (e) any of the provisions of the Notes or any of the other Credit Documents may be modified, amended or waived; (f) any party (including any co-guarantor) liable for the payment thereof may be granted indulgences or be released; and (g) any deposit balance for the credit of the Borrower or any other party liable for the payment of the Credit Party Obligations or liable upon any security therefor may be released, in whole or in part, at, before or after the stated, extended or accelerated maturity of the Credit Party Obligations, all without notice to or further assent by such Guarantor, which shall remain bound thereon, notwithstanding any such exchange, compromise, surrender, extension, renewal, acceleration, modification, indulgence or release.

4.4 Waiver of Rights.

Each Guarantor expressly waives to the fullest extent permitted by applicable law: (a) notice of acceptance of this Guaranty by the Lenders and of all extensions of credit to the Borrower by the Lenders; (b) presentment and demand for payment or performance of any of the Credit Party Obligations; (c) protest and notice of dishonor or of default (except as specifically required in the Credit Agreement) with respect to the Credit Party Obligations or with respect to any security therefor; (d) notice of the Lenders obtaining, amending, substituting for, releasing, waiving or modifying any security interest, lien or encumbrance, if any, hereafter securing the Credit Party Obligations, or the Lenders' subordinating, compromising, discharging or releasing such security interests, liens or encumbrances, if any; and (e) all other notices to which such Guarantor might otherwise be entitled.

4.5 Reinstatement.

The obligations of the Guarantors under this Section 4 shall be automatically reinstated if and to the extent that for any reason any payment by or on behalf of any Person in respect of the Credit Party Obligations is rescinded or must be otherwise restored by any holder of any of the Credit Party Obligations, whether as a result of any proceedings in bankruptcy or reorganization or otherwise, and each Guarantor agrees that it will indemnify the Administrative Agent and each Lender on demand for all reasonable costs and expenses (including, without limitation, reasonable Attorney Costs) incurred by the Administrative Agent or such Lender in connection with such

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rescission or restoration, including any such costs and expenses incurred in defending against any claim alleging that such payment constituted a preference, fraudulent transfer or similar payment under any bankruptcy, insolvency or similar law.

4.6 Remedies.

The Guarantors agree that, as between the Guarantors, on the one hand, and the Administrative Agent and the Lenders, on the other hand, the Credit Party Obligations may be declared to be forthwith due and payable as provided in
Section 9 (and shall be deemed to have become automatically due and payable in the circumstances provided in Section 9) notwithstanding any stay, injunction or other prohibition preventing such declaration (or preventing such Credit Party Obligations from becoming automatically due and payable) as against any other Person and that, in the event of such declaration (or such Credit Party Obligations being deemed to have become automatically due and payable), such Credit Party Obligations (whether or not due and payable by any other Person) shall forthwith become due and payable by the Guarantors.

4.7 Limitation of Guaranty.

Notwithstanding any provision to the contrary contained herein or in any of the other Credit Documents, to the extent the obligations of any Guarantor shall be adjudicated to be invalid or unenforceable for any reason (including, without limitation, because of any applicable state or federal law relating to fraudulent conveyances or transfers) then the obligations of such Guarantor hereunder shall be limited to the maximum amount that is permissible under applicable law (whether federal or state or otherwise and including, without limitation, the Bankruptcy Code).

4.8 Rights of Contribution.

The Credit Parties agree among themselves that, in connection with payments made hereunder, each Credit Party shall have contribution rights against the other Credit Parties as permitted under applicable law. Such contribution rights shall be subordinate and subject in right of payment to the obligations of the Credit Parties under the Credit Documents and no Credit Party shall exercise such rights of contribution until all Credit Party Obligations have been paid in full and the Commitments terminated.

4.9 Release of Guarantors.

Subject to Section 7.12(b), if any of the Guarantors shall cease to be a Material Domestic Subsidiary of the Borrower for any reason subject to and in accordance with the terms of the Credit Agreement, then such Guarantor shall, automatically and without any further action on the part of any party to any Credit Document, and upon notice to the Administrative Agent, be fully released and discharged from all its liabilities and obligations under or in respect of the Credit Documents to which such Guarantor is a party (other than liabilities and obligations resulting from a demand on such Guarantor's Guaranty pursuant to
Section 9.2) and, promptly upon the request of the Borrower and at the expense of the Borrower, the Administrative Agent shall execute such documents and take such other action as is reasonably requested by the Borrower to evidence the release and discharge of such Guarantor from all such liabilities and obligations and

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shall, if applicable, certify to the Borrower that such Guarantor has no liabilities or obligations resulting from a demand on such Guarantor's Guaranty pursuant to Section 9.2.

SECTION 5

CONDITIONS PRECEDENT

5.1 Closing Conditions.

The obligation of the Lenders to enter into this Credit Agreement and make the initial Extension of Credit is subject to satisfaction (or waiver) of the following conditions:

(a) Executed Credit Documents. Receipt by the Administrative Agent of duly executed copies of: (i) this Credit Agreement; (ii) the Notes requested by Lenders (or the Swing Line Lender) prior to the Closing Date; and (iii) all other Credit Documents, each in form and substance reasonably acceptable to the Lenders in their sole discretion.

(b) Authority Documents. Receipt by the Administrative Agent of the following with respect to each Credit Party:

(i) Organizational Documents. Copies of the articles or certificates of incorporation or other organizational documents of each Credit Party certified to be true and complete as of a recent date by the appropriate Governmental Authority of the state or other jurisdiction of its formation and certified by a secretary or assistant secretary of such Credit Party to be true and correct as of the Closing Date.

(ii) Bylaws. A copy of the bylaws or other governing documents of each Credit Party certified by a secretary or assistant secretary of such Credit Party to be true and correct as of the Closing Date.

(iii) Resolutions. Copies of resolutions of the Board of Directors or other governing body of each Credit Party approving and adopting the Credit Documents to which it is a party, the transactions contemplated therein and authorizing execution and delivery thereof, certified by a secretary or assistant secretary of such Credit Party to be true and correct and in full force and effect as of the Closing Date.

(iv) Good Standing. Copies of certificates of good standing, existence or its equivalent with respect to each Credit Party certified as of a recent date by the appropriate Governmental Authority of the state or other jurisdiction of its formation.

(v) Incumbency. An incumbency certificate of each Credit Party certified by a secretary or assistant secretary of such Credit Party to be true and correct as of the Closing Date.

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(c) Opinions of Counsel. Receipt by the Administrative Agent of opinions reasonably satisfactory to the Administrative Agent, addressed to the Administrative Agent on behalf of the Lenders and dated as of the Closing Date.

(d) Consents. Receipt by the Administrative Agent of evidence that all necessary governmental, shareholder and third party consents and approvals, if any, have been received and no condition or Requirement of Law exists which would reasonably be likely to restrain, prevent or impose any material adverse conditions on the transactions contemplated hereby.

(e) Officer's Certificates. The Administrative Agent shall have received a certificate or certificates executed by an Authorized Officer of the Borrower as of the Closing Date stating that (i) the financial statements and information delivered to the Administrative Agent on or before the Closing Date were prepared in good faith and that such financial statements were prepared in accordance with GAAP and (ii) immediately after giving effect to this Credit Agreement, the other Credit Documents and all the transactions contemplated herein or therein to occur on such date, (A) each Credit Party is Solvent and the Borrower and its Subsidiaries taken as a whole are Solvent, (B) no Default or Event of Default exists, (C) all representations and warranties contained herein and in the other Credit Documents are true and correct in all material respects, and (D) the Credit Parties are in compliance with each of the financial covenants set forth in Section 7.2.

(f) Senior Subordinated Notes. Receipt by the Administrative Agent of evidence that the holders of at least a majority of the Existing Senior Subordinated Notes have agreed to tender their Existing Senior Subordinated Notes to the Borrower, upon terms reasonably acceptable to the Administrative Agent.

(g) Senior Unsecured Notes. Receipt by the Administrative Agent of evidence that the Senior Unsecured Notes have been issued on terms reasonably acceptable to the Administrative Agent and containing terms customary for investment grade issuers and in a principal amount not less than $250,000,000.

(h) Existing Credit Agreement. Receipt by the Administrative Agent of evidence satisfactory to it that all of the Indebtedness of the Credit Parties under the Existing Credit Agreement has been paid in full (or will be paid in full with the proceeds of the initial Loans made herein), all documents executed or delivered in connection therewith have been terminated and all Liens granted in connection therewith have been released or are agreed to be released upon such repayment in full.

(i) Fees and Expenses. Payment by the Credit Parties of all fees (and all expenses for which invoices have been presented at least three Business Days prior to the Closing Date) owed by them as of the Closing Date to the Agents and the Lenders, including, without limitation, as set forth in the Fee Letters.

(j) Other. Receipt by the Lenders of such other documents, instruments, agreements or information as reasonably and timely requested by any Lender.

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5.2 Conditions to All Extensions of Credit.

In addition to the conditions precedent stated elsewhere herein, the Lenders shall not be obligated to make Loans nor shall the Issuing Lender be required to issue or extend a Letter of Credit unless:

(a) Notice. The Borrower shall have delivered (i) in the case of any new Revolving Loan, to the Administrative Agent, an appropriate Notice of Borrowing, duly executed and completed, by the time specified in Section 2.1, (ii) in the case of any Letter of Credit, to the Issuing Lender, an appropriate request for issuance of a Letter of Credit in accordance with the provisions of Section 2.2, (iii) in the case of any Swing Line Loan, to the Swing Line Lender, a Swing Line Loan Request, duly executed and completed, by the time specified in
Section 2.3, and (iv) in the case of any Competitive Bid Loan, to the Administrative Agent, an appropriate Competitive Bid Request, duly executed and completed, by the time specified in Section 2.4.

(b) Representations and Warranties. The representations and warranties made by the Credit Parties in any Credit Document are true and correct in all material respects at and as if made as of such date except to the extent they expressly and exclusively relate to an earlier date.

(c) No Default. No Default or Event of Default shall exist and be continuing either prior to or after giving effect to such Extension of Credit.

(d) Availability. Immediately after giving effect to the making of a Loan (and the application of the proceeds thereof) or to the issuance of a Letter of Credit, as the case may be, (i) the sum of the outstanding Revolving Loans plus outstanding LOC Obligations plus outstanding Swing Line Loans plus outstanding Competitive Bid Loans shall not exceed the Revolving Committed Amount, (ii) the sum of outstanding LOC Obligations shall not exceed the LOC Committed Amount,
(iii) the sum of outstanding Swing Line Loans shall not exceed the Swing Line Committed Amount and (iv) the sum of outstanding Competitive Bid Loans shall not exceed $200,000,000.

The delivery of each Notice of Borrowing, each request for a Letter of Credit, each Swing Line Loan Request and each Competitive Bid Loan Request shall constitute a representation and warranty by the Borrower of the correctness of the matters specified in subsections (b), (c), and (d) above.

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SECTION 6

REPRESENTATIONS AND WARRANTIES

The Credit Parties hereby represent to the Administrative Agent and each Lender that:

6.1 Organization and Good Standing.

Each Credit Party (a) is either a partnership, a corporation or a limited liability company duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization, (b) is duly qualified and in good standing as a foreign organization and authorized to do business in every other jurisdiction where its ownership or operation of property or the conduct of its business would require it to be qualified, in good standing and authorized, unless the failure to be so qualified, in good standing or authorized would not have or would not reasonably be expected to have a Material Adverse Effect and (c) has the power and authority to own and operate its properties and to carry on its business as now conducted and as currently proposed to be conducted.

6.2 Due Authorization.

Each Credit Party (a) has the power and authority to execute, deliver and perform this Credit Agreement and the other Credit Documents to which it is a party and to incur the obligations herein and therein provided for and (b) has duly taken all necessary action to authorize, and is duly authorized, to execute, deliver and perform this Credit Agreement and the other Credit Documents to which it is a party.

6.3 Enforceable Obligations.

Each Credit Party has duly executed this Credit Agreement and each other Credit Document to which such Credit Party is a party and this Credit Agreement and such other Credit Documents constitute legal, valid and binding obligations of such Credit Party enforceable against such Credit Party in accordance with their respective terms, except as may be limited by bankruptcy or insolvency laws or similar laws affecting creditors' rights generally or by general equitable principles.

6.4 No Conflicts.

Neither the execution and delivery of the Credit Documents to which it is a party, nor the consummation of the transactions contemplated herein and therein, nor the performance of or compliance with the terms and provisions hereof and thereof by a Credit Party will (a) violate, contravene or conflict with any provision of such Credit Party's organizational documents, (b) violate, contravene or conflict with any Requirement of Law (including, without limitation, Regulations T, U or X), order, writ, judgment, injunction, decree, license or permit applicable to such Credit Party which violation would have or would reasonably be expected to have a Material Adverse Effect, (c) violate, contravene or conflict with contractual provisions of, or cause an event of default under, any indenture, loan agreement, mortgage, deed of trust, contract or other agreement or instrument to which such Credit Party is a party or by which it or its properties may be

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bound which violation would have or would reasonably be expected to have a Material Adverse Effect, or (d) result in or require the creation of any Lien upon or with respect to the properties of such Credit Party.

6.5 Consents.

Except for consents, approvals and authorizations which have been obtained or the absence of which would not have or would not reasonably be expected to have a Material Adverse Effect, no consent, approval, authorization or order of, or filing, registration or qualification with, any Governmental Authority, equity owner or third party in respect of any Credit Party is required in connection with the execution, delivery or performance of this Credit Agreement or any of the other Credit Documents, or the consummation of any transaction contemplated herein or therein by such Credit Party.

6.6 Financial Condition.

The financial statements delivered to the Administrative Agent and the Lenders pursuant to Sections 7.1(a) and (b): (a) have been prepared in accordance with GAAP and (b) present fairly the consolidated financial condition, results of operations and cash flows of the Borrower and its Subsidiaries as of such date and for such periods. Since December 31, 2000, there has been no sale, transfer or other disposition by the Borrower or any of its Subsidiaries of any material part of the business or property of the Borrower and its Subsidiaries, taken as a whole, or purchase or other acquisition by any such Person of any business or property (including any Capital Stock of any other Person) material in relation to the consolidated financial condition of the Borrower and its Subsidiaries, taken as a whole, in each case, which, is not (i) reflected in the most recent financial statements delivered to the Lenders prior to the Closing Date or pursuant to Section 7.1 or in the notes thereto or (ii) otherwise permitted by the terms of this Credit Agreement and communicated to the Administrative Agent and the Lenders.

6.7 No Material Change.

Except as disclosed on Schedule 6.7, since December 31, 2000, there has been no development or event relating to or affecting the Borrower or any of its Subsidiaries which has had or would reasonably be expected to have a Material Adverse Effect.

6.8 Disclosure.

Neither this Credit Agreement, nor any other Credit Document, nor any financial statements delivered to the Administrative Agent or the Lenders nor any other document, certificate or statement furnished to the Administrative Agent or the Lenders by or on behalf of any Credit Party in connection with the transactions contemplated hereby, taken as a whole, contains any untrue statement of a material fact or omits to state a material fact necessary in order to make the statements contained therein or herein not misleading.

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6.9 No Default.

No Default or Event of Default has occurred and is continuing or would result from the consummation of the transactions contemplated by this Credit Agreement and the other Credit Documents.

6.10 Litigation.

Except as set forth in Schedule 6.10, no litigation, investigation, claim, criminal prosecution, civil investigative demand, imposition of criminal or civil fines and penalties, or any other proceeding of or before any arbitrator or Governmental Authority is pending or, to the knowledge of the Borrower, threatened by or against the Borrower or any of its Subsidiaries or against any of its or their respective Properties (a) with respect to the Credit Documents or any Loan or any of the transactions contemplated hereby or (b) which would reasonably be expected to have a Material Adverse Effect.

6.11 Taxes.

The Borrower and each of its Subsidiaries has filed, or caused to be filed, all material tax returns (federal, state, local and foreign) required to be filed and has paid (a) all amounts of taxes shown thereon to be due (including interest and penalties) and (b) all other material taxes, fees, assessments and other governmental charges (including mortgage recording taxes, documentary stamp taxes and intangibles taxes) owing by it, except for such taxes (i) which are not yet delinquent or (ii) that are being contested in good faith and by proper proceedings, and against which adequate reserves are being maintained in accordance with GAAP.

6.12 Compliance with Law.

Except to the extent the same would not have or would not reasonably be expected to have a Material Adverse Effect:

(a) The Borrower and each of its Subsidiaries is in compliance with all Requirements of Law (including, without limitation, Environmental Laws, ERISA, Medicaid Regulations, Medicare Regulations, 42 U.S.C.ss.1320a-7b and 42 U.S.C.ss.1395nn) and all material orders, writs, injunctions and decrees applicable to it, or to its Properties.

(b) (i) Neither the Borrower nor any of its Subsidiaries nor any individual employed by the Borrower or any of its Subsidiaries who may reasonably be expected to be excluded or suspended from participation in any Medical Reimbursement Program for their corporate or individual actions or failures to act; and (ii) there is no member of management continuing to be employed by the Borrower or any of its Subsidiaries who may reasonably be expected to have individual criminal culpability for healthcare matters under investigation by any Governmental Authority unless such member of management has been, within a reasonable period of time after discovery of such actual or potential culpability, either suspended or removed from positions of responsibility related to those activities under challenge by the Governmental Authority.

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(c) Current billing policies, arrangements, protocols and instructions comply with all material requirements of Medical Reimbursement Programs and are administered by properly trained personnel.

(d) Current medical director compensation arrangements and other arrangements with referring physicians comply with state and federal self-referral and anti-kickback laws, including without limitation 42 U.S.C. Section 1320a-7b(b)(1) - (b)(2) and 42 U.S.C.
Section 1395nn.

6.13 Licensing and Accreditation.

Except to the extent the same would not have or would not be reasonably expected to have a Material Adverse Effect, each of the Credit Parties has, to the extent applicable: (a) obtained and maintains in good standing all required licenses, permits, authorization and approvals of each Governmental Authority necessary to the conduct of its business; (b) to the extent prudent and customary in the industry in which it is engaged, obtained and maintains accreditation from all generally recognized accrediting agencies (including, but not limited to, CAP); (c) obtained and maintains CLIA certification; (d) entered into and maintains in good standing its Medicare Provider Agreements and its Medicaid Provider Agreements; and (e) ensured that all such required licenses, certifications and accreditations are in full force and effect on the date hereof and have not been revoked or suspended or otherwise limited.

6.14 Title to Properties, Liens.

The Borrower and each of its Subsidiaries, is the owner of, and has good title to, or has a valid license or lease to use, all of its material Properties. All Liens on the Properties of the Borrower and its Subsidiaries are Permitted Liens.

6.15 Insurance.

The properties of the Borrower and each of its Subsidiaries are insured with financially sound and reputable insurance companies that are not Affiliates of the Borrower (except to the extent that self-insurance is maintained in reasonable amounts), in such amounts, with such deductibles and covering such risks, as is reasonable and prudent.

6.16 Use of Proceeds.

The proceeds of the Loans will be used solely for the purposes specified in Section 7.10. No proceeds of the Loans will be used for the Acquisition of another Person unless such Acquisition is a Permitted Acquisition.

6.17 Government Regulation.

(a) "Margin stock" within the meaning of Regulation U does not constitute more than 25% of the value of the consolidated assets of the Borrower and its

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Subsidiaries. None of the transactions contemplated by the Credit Documents (including, without limitation, the direct or indirect use of the proceeds of the Loans) will violate or result in a violation of (i) the Securities Act, (ii) the Exchange Act or (iii) Regulations T, U or X.

(b) Neither the Borrower nor any of its Subsidiaries is subject to regulation under the Public Utility Holding Company Act of 1935, the Federal Power Act or the Investment Company Act of 1940, each as amended.

6.18 ERISA.

Except as would not result in or would not reasonably be expected to result in a Material Adverse Effect:

(a) (i) No ERISA Event has occurred, and, to the best knowledge of the Borrower, each of its Subsidiaries and each ERISA Affiliate, no event or condition has occurred or exists as a result of which any ERISA Event could reasonably be expected to occur, with respect to any Plan; (ii) no "accumulated funding deficiency," as such term is defined in Section 302 of ERISA and Section 412 of the Code, whether or not waived, has occurred with respect to any Plan and no application for a funding waiver or an extension of any amortization period pursuant to Section 412 of the Code has been made with respect to any Plan; (iii) each Plan has been maintained, operated, and funded in compliance with its own terms and in material compliance with the provisions of ERISA, the Code, and any other applicable federal or state laws; (iv) each Plan that is intended to qualify under Section 401(a) of the Code has received a favorable determination letter from the IRS or an application for such a letter is currently being processed by the IRS with respect thereto and, to the best knowledge of the Borrower, each of its Subsidiaries and each ERISA Affiliate, nothing has occurred which would prevent, or cause the loss of, such qualification; and (v) no Lien in favor or the PBGC or a Plan has arisen or is reasonably likely to arise on account of any Plan.

(b) Neither the Borrower nor any Subsidiary of the Borrower nor any ERISA Affiliate has incurred, or, to the best of each such party's knowledge, is reasonably expected to incur, any liability under Title IV of ERISA with respect to any Single Employer Plan, or any withdrawal liability under ERISA to any Multiemployer Plan or Multiple Employer Plan. Neither the Borrower nor any Subsidiary of the Borrower nor any ERISA Affiliate has received any notification that any Multiemployer Plan is in reorganization (within the meaning of Section 4241 of ERISA), is insolvent (within the meaning of Section 4245 of ERISA), or has been terminated (within the meaning of Title IV of ERISA), and no Multiemployer Plan is, to the best of each such Person's knowledge, reasonably expected to be in reorganization, insolvent, or terminated. Neither the Borrower nor any Subsidiary of the Borrower nor any ERISA Affiliate has engaged in a transaction that could be subject to Sections 4069 or 4212(c) of ERISA.

(c) No prohibited transaction (within the meaning of Section 406 of ERISA or Section 4975 of the Code) or breach of fiduciary responsibility has occurred with respect to

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a Plan which has subjected or may subject the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate to any liability under Sections 406, 409, 502(i), or 502(l) of ERISA or Section 4975 of the Code, or under any agreement or other instrument pursuant to which the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate has agreed or is required to indemnify any person against any such liability. There are no pending or, to the best knowledge of the Borrower, each of its Subsidiaries and each ERISA Affiliate, threatened claims, actions or lawsuits, or action by any Governmental Authority, with respect to any Plan that could reasonably be expected to have a Material Adverse Effect.

(d) Each Plan that is a welfare plan (as defined in Section 3(1) of ERISA) to which Sections 601-609 of ERISA and Section 4980B of the Code apply has been administered in compliance in all material respects with such sections.

6.19 Environmental Matters.

(a) Except as would not result in or would not reasonably be expected to result in a Material Adverse Effect:

(i) Each of the real properties owned, leased or operated by the Borrower or any of its Subsidiaries (the "Real Properties") and all operations at the Real Properties are in compliance with all applicable Environmental Laws, and there is no violation of any Environmental Law with respect to the Real Properties or the businesses operated by the Borrower or any of its Subsidiaries (the "Businesses"), and there are no conditions relating to the Businesses or Real Properties that would reasonably be expected to give rise to liability under any applicable Environmental Laws.

(ii) No Credit Party has received any written notice of, or inquiry from any Governmental Authority regarding, any violation, alleged violation, non-compliance, liability or potential liability regarding Hazardous Materials or compliance with Environmental Laws with regard to any of the Real Properties or the Businesses, nor, to the knowledge of the Borrower or any of its Subsidiaries, is any such notice being threatened.

(iii) Hazardous Materials have not been transported or disposed of from the Real Properties, or generated, treated, stored or disposed of at, on or under any of the Real Properties or any other location, in each case by, or on behalf or with the permission of, the Borrower or any of its Subsidiaries in a manner that would give rise to liability under any applicable Environmental Laws.

(iv) No judicial proceeding or governmental or administrative action is pending or, to the knowledge of the Borrower or any of its Subsidiaries, threatened, under any Environmental Law to which the Borrower or any of its Subsidiaries is or will be named as a party, nor are there any consent decrees or other decrees, consent orders, administrative orders or other orders, or other administrative or judicial

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requirements outstanding under any Environmental Law with respect to the Borrower or any of its Subsidiaries, the Real Properties or the Businesses.

(v) There has been no release (including, without limitation, disposal) or threat of release of Hazardous Materials at or from the Real Properties, or arising from or related to the operations of the Borrower or any of its Subsidiaries in connection with the Real Properties or otherwise in connection with the Businesses where such release constituted a violation of, or would give rise to liability under, any applicable Environmental Laws.

(vi) None of the Real Properties contains, or has previously contained, any Hazardous Materials at, on or under the Real Properties in amounts or concentrations that, if released, constitute or constituted a violation of, or could give rise to liability under, Environmental Laws.

(vii) Neither the Borrower, nor any of its Subsidiaries, has assumed any liability of any Person (other than among themselves) under any Environmental Law.

(b) The Credit Parties have adopted procedures that are designed to (i) ensure that each Credit Party, any of its operations and each of the Real Properties complies with applicable Environmental Laws and (ii) minimize any liabilities or potential liabilities that each Credit Party, any of its operations and each of the Real Properties may have under applicable Environmental Laws.

6.20 Intellectual Property.

The Borrower and each of its Subsidiaries owns, or has the legal right to use, all material patents, trademarks, tradenames, copyrights, technology, know-how and processes (the "Intellectual Property") necessary for each of them to conduct its business as currently conducted other than as would not have or would not be reasonably expected to have a Material Adverse Effect. No claim has been asserted and is pending by any Person challenging or questioning the use of any Intellectual Property owned by the Borrower or any of its Subsidiaries or that the Borrower or any of its Subsidiaries has a right to use or the validity or effectiveness of any such Intellectual Property, nor does the Borrower or any of its Subsidiaries have knowledge of any such claim, and, to the knowledge of the Borrower and its Subsidiaries, the use of any Intellectual Property by the Borrower and its Subsidiaries does not infringe on the rights of any Person, except for such claims and infringements that in the aggregate, would not have or would not reasonably be expected to have a Material Adverse Effect.

6.21 Subsidiaries.

As of the Closing Date, set forth on Schedule 6.21 is a complete and accurate list of all Subsidiaries of the Borrower and which of such Subsidiaries are Material Domestic Subsidiaries.

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6.22 Solvency.

Each Credit Party is and, after consummation of the transactions contemplated by this Credit Agreement, will be Solvent.

SECTION 7

AFFIRMATIVE COVENANTS

Each Credit Party hereby covenants and agrees that so long as this Credit Agreement is in effect and until the Loans and LOC Obligations, together with interest and fees and other obligations then due and payable hereunder, have been paid in full and the Commitments and Letters of Credit hereunder shall have terminated:

7.1 Information Covenants.

The Credit Parties will furnish, or cause to be furnished, to the Administrative Agent and each of the Lenders an electronic (if readily available) and a hard copy of:

(a) Annual Financial Statements. As soon as available, and in any event within 95 days after the close of each fiscal year of the Borrower, a consolidated balance sheet and income statement of the Borrower and its Subsidiaries, as of the end of such fiscal year, together with related consolidated statements of operations, cash flows and changes in stockholders' equity for such fiscal year, setting forth in comparative form consolidated figures for the preceding fiscal year, all such consolidated financial information described above to be audited by independent certified public accountants of recognized national standing and whose opinion shall be to the effect that such financial statements fairly present in all material respects the consolidated financial position, results of operations and cash flows of the Borrower and its Subsidiaries as at the end of, and for, such fiscal year in accordance with GAAP and shall not be limited as to the scope of the audit or qualified in any manner.

(b) Quarterly Financial Statements. As soon as available, and in any event within 50 days after the close of each of the first three fiscal quarters of the Borrower, a consolidated balance sheet and income statement of the Borrower and its Subsidiaries, as of the end of such fiscal quarter, together with related consolidated statements of operations, cash flows and changes in stockholders' equity for such fiscal quarter setting forth in each case in comparative form the corresponding consolidated statements of operations and cash flows for the corresponding period of the preceding fiscal year, and accompanied by a certificate of an Authorized Officer of the Borrower to the effect that such quarterly financial statements fairly present in all material respects the consolidated financial condition of the Borrower and its Subsidiaries and in accordance with GAAP, subject to changes resulting from audit and normal year-end audit adjustments. Notwithstanding the above, it is understood and agreed that delivery of the Borrower's applicable Form 10-Q shall satisfy the requirements of this Section 7.1(b).

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(c) Officer's Certificate. At the time of delivery of the financial statements provided for in Sections 7.1(a) and 7.1(b) above, a certificate of an Authorized Officer of the Borrower substantially in the form of Exhibit 7.1(c), (i) demonstrating compliance with the financial covenants contained in Section 7.2 and the covenant requirements in Sections 7.12(b) and 7.13 by calculation thereof as of the end of each such fiscal period, (ii) demonstrating compliance with any other terms of this Credit Agreement as reasonably requested by the Administrative Agent, (iii) stating that no Default or Event of Default exists, or if any Default or Event of Default does exist, specifying the nature and extent thereof and what action the Borrower proposes to take with respect thereto and (iv) updating Schedule 6.21 as of the end of such fiscal period.

(d) Reports. Promptly upon transmission or receipt thereof, copies of all financial statements, proxy statements, notices and reports as the Borrower or any of its Subsidiaries shall send to shareholders of the Borrower generally and, upon request of the Administrative Agent, copies of any filings and registrations with, and reports to or from, any Governmental Authority which has regulatory authority with respect to the Borrower and its Subsidiaries.

(e) Notices. Upon a Credit Party obtaining knowledge thereof, the Borrower will give written notice to the Administrative Agent promptly (and in any event within five Business Days) of (i) the occurrence of an event or condition consisting of a Default or Event of Default, specifying the nature and existence thereof and what action the Borrower proposes to take with respect thereto, (ii) the occurrence of any of the following with respect to the Borrower or any of its Subsidiaries (A) the pendency or commencement of any litigation, arbitration or governmental proceeding against the Borrower or any of its Subsidiaries which (x) would have or would reasonably be expected to have a Material Adverse Effect, or (y) would result in a significant liability to the Credit Parties or (B) material non-compliance with, or the institution of any proceedings against the Borrower or any of its Subsidiaries with respect to, or the receipt of written notice by such Person of potential liability or responsibility for violation, or alleged violation of, any Requirement of Law (including, without limitation, Environmental Laws) the violation of which would have or would reasonably be expected to have a Material Adverse Effect (iii) any change to the Debt Rating of the Borrower, and (iv) any investigation or proceeding against the Borrower or any of its Subsidiaries to suspend, revoke or terminate, any Medicaid Provider Agreement, Medicare Provider Agreement, or exclusion from any Medical Reimbursement Program, which is reasonably expected to have a Material Adverse Effect; and (v) any breach by the Borrower or any of its Subsidiaries or any predecessor of the Borrower or any of its Subsidiaries of the Corporate Integrity Agreement entered into with the OIG if such breach causes the OIG to take any adverse action as a result of such breach.

(f) ERISA. Upon the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate obtaining knowledge thereof, such Person shall give written notice to the Administrative Agent and each of the Lenders promptly (and in any event within two Business Days) of the occurrence of any of the following events which has had or would be

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reasonably expected to have a Material Adverse Effect: (i) any Reportable Event, that constitutes an ERISA Event; (ii) with respect to any Multiemployer Plan, the receipt of notice as prescribed in ERISA or otherwise of any withdrawal liability assessed against the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate, or of a determination that any Multiemployer Plan is in reorganization or insolvent (both within the meaning of Title IV of ERISA); (iii) the failure to make full payment on or before the due date (including extensions) thereof of all amounts which the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate is required to contribute to each Plan pursuant to its terms and as required to meet the minimum funding standard set forth in ERISA and the Code with respect thereto; or (iv) any change in the funding status of any Plan that could have a Material Adverse Effect; in each case together with a description of any such event or condition or a copy of any such notice and a statement by an Authorized Officer of the Borrower briefly setting forth the details regarding such event, condition, or notice, and the action, if any, which has been or is being taken or is proposed to be taken by such Person with respect thereto. Promptly upon request, the Credit Parties shall furnish the Administrative Agent and the Lenders with such additional information concerning any Plan as may be reasonably requested, including, but not limited to, copies of each annual report/return (Form 5500 series), as well as all schedules and attachments thereto required to be filed with the Department of Labor and/or the Internal Revenue Service pursuant to ERISA and the Code, respectively, for each "plan year" (within the meaning of Section 3(39) of ERISA).

(g) Environmental.

(i) Subsequent to a written notice from any Governmental Authority that would reasonably be expected to result in a Material Adverse Effect, or during the existence of an Event of Default, and upon the written request of Administrative Agent, the Credit Parties will furnish or cause to be furnished to the Administrative Agent, at the Credit Parties' expense, a report of an environmental assessment of reasonable scope, form and depth, including, where appropriate, invasive soil or groundwater sampling, by a consultant reasonably acceptable to the Administrative Agent addressing the subject of such notice or, if during the existence of an Event of Default, regarding any release or threat of release of Hazardous Materials on any Property owned, leased or operated by a Credit Party and the compliance by the Credit Parties with Environmental Laws. If the Credit Parties fail to deliver such an environmental report within seventy-five (75) days after receipt of such written request, then the Administrative Agent may arrange for same, and the Credit Parties hereby grant to the Administrative Agent and its representatives access to the Real Properties and a license of a scope reasonably necessary to undertake such an assessment (including, where appropriate, invasive soil or groundwater sampling). The reasonable cost of any assessment arranged for by the Administrative Agent pursuant to this provision will be payable by the Credit Parties on demand.

(ii) Each Credit Party will conduct and complete, or cause to be conducted and completed, all investigations, studies, sampling, and testing and all remedial, removal, and other actions necessary to address all Hazardous Materials

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on, from, or affecting any Real Properties to the extent necessary to be in compliance with all Environmental Laws and all other applicable federal, state, and local laws, regulations, rules and policies and with the orders and directives of all Governmental Authorities exercising jurisdiction over such Real Properties to the extent any failure would have or would reasonably be expected to have a Material Adverse Effect.

(h) Other Information. With reasonable promptness upon any such request, such other information regarding the business, properties or financial condition of the Borrower and its Subsidiaries as the Administrative Agent may reasonably request.

7.2 Financial Covenants.

(a) Leverage Ratio. The Leverage Ratio, as of the last day of each fiscal quarter of the Borrower, shall be less than or equal to 3.25 to 1.0.

(b) Fixed Charge Coverage Ratio. The Fixed Charge Coverage Ratio, as of the last day of each fiscal quarter of the Borrower, shall be greater than or equal to 1.5 to 1.0.

7.3 Preservation of Existence and Franchises.

The Borrower will, and will cause its Subsidiaries to, do all things necessary to preserve and keep in full force and effect its existence, rights, franchises, Intellectual Property and authority except as permitted by Section 8.4; provided that neither the Borrower nor any of its Subsidiaries shall be required to preserve any rights, franchises, Intellectual Property or authority if the Borrower or such Subsidiary shall determine that the preservation thereof is no longer desirable in the conduct of its business and if the loss thereof would not have or would not reasonably be expected to have a Material Adverse Effect.

7.4 Books and Records.

The Borrower will, and will cause its Subsidiaries to, keep complete and accurate books and records of its transactions in order to produce its financial statements in accordance with GAAP (including the establishment and maintenance of appropriate reserves).

7.5 Compliance with Law.

Except to the extent the failure to do so would not have or would not reasonably be expected to have a Material Adverse Effect, the Borrower will, and will cause each of its Subsidiaries to, (a) comply with all Requirements of Law, and all applicable restrictions imposed by all Governmental Authorities, applicable to it and its Property (including, without limitation, Environmental Laws and ERISA), (b) conform with and duly observe in all material respects all laws, rules and regulations and all other valid requirements of any regulatory authority with respect to the conduct of its business, including without limitation Titles XVIII and XIX of the Social Security Act, Medicare Regulations, Medicaid Regulations, and all laws, rules and

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regulations of Governmental Authorities, pertaining to the business of the Credit Parties; (c) obtain and maintain all licenses, permits, certifications and approvals of all applicable Governmental Authorities as are required for the conduct of its business as currently conducted and herein contemplated, including without limitation professional licenses, CLIA certifications, Medicare Provider Agreements and Medicaid Provider Agreements; and (d) ensure that (i) billing policies, arrangements, protocols and instructions will comply with reimbursement requirements under Medicare, Medicaid and other Medical Reimbursement Programs and will be administered by properly trained personnel; and (ii) medical director compensation arrangements and other arrangements with referring physicians will comply with applicable state and federal self-referral and anti-kickback laws, including without limitation 42 U.S.C. Section 1320a-7b(b)(1) - (b)(2) 42 U.S.C. and 42 U.S.C. Section 1395nn.

7.6 Payment of Taxes and Other Indebtedness.

The Borrower will, and will cause its Subsidiaries to, pay, settle or discharge (a) all material taxes, assessments and governmental charges or levies imposed upon it, or upon its income or profits, or upon any of its properties, before they shall become delinquent, (b) all material lawful claims (including claims for labor, materials and supplies) which, if unpaid, might give rise to a Lien upon any of its properties, and (c) all of its other material Indebtedness as it shall become due (to the extent such repayment is not otherwise prohibited by this Credit Agreement); provided, however, that a Credit Party shall not be required to pay any such tax, assessment, charge, levy, claim or Indebtedness which is being contested in good faith by appropriate proceedings and as to which adequate reserves therefor have been established in accordance with GAAP, unless the failure to make any such payment (i) would give rise to an immediate right to foreclose or collect on a Lien securing such amounts or (ii) would have or would reasonably be expected to have a Material Adverse Effect.

7.7 Insurance.

The Borrower will, and will cause each of its Subsidiaries to, at all times maintain in full force and effect insurance (including worker's compensation, liability, casualty and business interruption insurance) with reputable national companies that are not Affiliates of the Borrower (except to the extent that self-insurance is maintained in reasonable amounts), in such amounts, covering such risks and liabilities as is reasonable and prudent.

7.8 Maintenance of Property.

The Borrower will, and will cause its Subsidiaries to, maintain and preserve its properties and equipment in good repair, working order and condition, normal wear and tear excepted, and will make, or cause to be made, in such properties and equipment from time to time all repairs, renewals, replacements, extensions, additions, betterments and improvements thereto as may be needed or proper, in each case to the extent and in the manner customary for companies in similar businesses.

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7.9 Performance of Obligations.

Except to the extent the failure to do so would not have or would not reasonably be expected to have a Material Adverse Effect, the Borrower will, and will cause its Subsidiaries to, perform all of its obligations under the terms of all contracts, agreements or other agreements not evidencing Indebtedness to which it is a party or by which it or its Properties may be bound.

7.10 Use of Proceeds.

The Borrower will use the proceeds of the Loans solely (a) to repay Indebtedness outstanding under the Existing Credit Agreement and to repurchase Existing Senior Subordinated Notes, (b) to provide working capital for the Borrower and its Subsidiaries and (c) for general corporate purposes of the Borrower and its Subsidiaries including Capital Expenditures and Permitted Investments. The Borrower will use the Letters of Credit solely for the purposes set forth in Section 2.2(a).

7.11 Audits/Inspections.

Upon reasonable notice and during normal business hours, but not more than once per calendar year, the Borrower will, and will cause each of its Subsidiaries to, permit representatives appointed by the Administrative Agent or any Lender, including, without limitation, independent accountants, agents, attorneys and appraisers to visit and inspect the Borrower's or any Subsidiary's Property, including its books and records, its accounts receivable and inventory, its facilities and its other business assets, and to make photocopies or photographs thereof and to write down and record any information such representative obtains and shall permit the Administrative Agent, any Lender or its representatives to investigate and verify the accuracy of information provided to the Administrative Agent or the Lenders and to discuss all such matters with the officers, employees and representatives of the Borrower and/or its Subsidiaries; provided, however, during the existence of a Default or Event of Default, the Administrative Agent and the Lenders may request as many inspections as reasonable under the circumstances. Any expenses incurred in connection with this Section 7.11 shall be for the account of the Lenders unless an Event of Default exists in which case such expenses shall be for the account of the Borrower. Any representatives appointed by the Administrative Agent shall sign a confidentiality agreement reasonably acceptable to the Borrower prior to any visit, investigation, inspection or verification permitted by this Section 7.11.

7.12 Additional Credit Parties.

(a) At the time any Person becomes a Material Domestic Subsidiary or at the time any Subsidiary of the Borrower guaranties the Senior Unsecured Notes (if it is not already a Guarantor), the Borrower shall so notify the Administrative Agent and promptly thereafter (but in any event within 30 days) shall cause such Person to (i) execute a Joinder Agreement in substantially the same form as Exhibit 7.12, and
(ii) deliver such other documentation as the Administrative Agent may reasonably request in connection with the foregoing, including, without limitation, certified resolutions and other organizational and authorizing documents of such Person and favorable opinions of counsel to such Person (which shall cover, among other things, the

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legality, validity, binding effect and enforceability of the documentation referred to above), all in form, content and scope reasonably satisfactory to the Administrative Agent.

(b) If at any time Non-Material Domestic Subsidiaries own assets in an aggregate amount greater than five percent (5%) of Total Assets or produce revenues in an aggregate amount greater than five percent (5%) of the total revenues of the Borrower and its Subsidiaries on a consolidated basis, the Borrower will designate one or more Non-Material Domestic Subsidiaries to become a Guarantor (and such Non-Material Domestic Subsidiary shall become a Guarantor in accordance with clause (a) above) so that after giving effect to such designation and action, Non-Material Domestic Subsidiaries own assets in the aggregate of equal to or less than five percent (5%) of Total Assets and produce revenues in an aggregate amount equal to or less than five percent (5%) of the total revenues of the Borrower and its Subsidiaries on a consolidated basis.

7.13 Credit Party Revenues.

The Borrower will take such action as is necessary to cause the aggregate annual net revenues of the Credit Parties, as of the end of each fiscal quarter for the prior twelve month period, to be greater than or equal to the lesser of (a) $2,800,000,000 or (b) 80% of the total consolidated annual net revenues of the Borrower and its Subsidiaries for the prior twelve month period.

7.14 Compliance Program.

The Borrower will, and will cause each of its Domestic Subsidiaries that operates a clinical laboratory to, maintain, and be operated in accordance with, a compliance program which is reasonably designed to provide effective internal controls that promote adherence to applicable federal and state law and the program requirements of federal and state health plans, and which includes the implementation of internal audits and monitoring on a regular basis to monitor compliance with the requirements of the compliance program and applicable law, regulations and company policies.

SECTION 8

NEGATIVE COVENANTS

Each Credit Party hereby covenants and agrees that so long as this Credit Agreement is in effect and until the Loans and LOC Obligations, together with interest, fees and other obligations then due and payable hereunder, have been paid in full and the Commitments and Letters of Credit hereunder shall have terminated:

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8.1 Indebtedness.

The Borrower will not permit any of its Subsidiaries to, contract, create, incur, assume or permit to exist any Indebtedness, other than:

(a) Guaranty Obligations arising under this Credit Agreement and the other Credit Documents;

(b) Indebtedness in respect of current accounts payable and accrued expenses incurred in the ordinary course of business;

(c) Indebtedness owing by a Subsidiary of the Borrower to the Borrower or another Subsidiary of the Borrower;

(d) purchase money Indebtedness (including Capital Leases) to finance the purchase of fixed assets (including equipment); provided that (i) the total of all such Indebtedness shall not exceed an aggregate principal amount of $50,000,000 (less any purchase money Indebtedness incurred by the Borrower) at any one time outstanding;
(ii) such Indebtedness when incurred shall not exceed the purchase price of the asset(s) financed; and (iii) no such Indebtedness shall be refinanced for a principal amount in excess of the principal balance outstanding thereon at the time of such refinancing;

(e) Indebtedness arising from Permitted Receivables Financings in an amount not to exceed $450,000,000, in the aggregate (less any Indebtedness incurred by the Borrower arising from Permitted Receivables Financings), at any one time outstanding;

(f) Indebtedness evidenced by Hedging Agreements entered into in the ordinary course of business and not for speculative purposes;

(g) Any guaranty of Indebtedness of the Borrower;

(h) Indebtedness incurred after the Effective Date in connection with the acquisition of a Person or Property as long as such Indebtedness existed prior to such acquisition and was not created in anticipation thereof;

(i) Indebtedness existing on the Closing Date as set forth on Schedule 8.1; and

(j) other unsecured Indebtedness in an amount not to exceed $200,000,000, in the aggregate, at any one time outstanding.

8.2 Liens.

The Borrower will not, nor will it permit its Subsidiaries to, contract, create, incur, assume or permit to exist any Lien with respect to any of its Property of any kind (whether real or personal, tangible or intangible), whether now owned or after acquired, other than Permitted Liens.

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8.3 Nature of Business.

The Borrower will not, nor will it permit its Subsidiaries to, alter the character of its business from that conducted as of the Effective Date or engage in any substantial manner in any business other than (a) the business conducted by the Borrower and its Subsidiaries as of the Effective Date, (b) the business of MedPlus and its Subsidiaries and (c) other healthcare-related businesses.

8.4 Consolidation and Merger.

The Borrower will not, nor will it permit any Subsidiary to, enter into any transaction of merger or consolidation or liquidate, wind up or dissolve itself, or suffer any such liquidation, wind-up or dissolution; provided that (subject to Sections 7.12 and 7.13) (a) a Subsidiary of the Borrower may merge into the Borrower or another Subsidiary of the Borrower, (b) a Subsidiary of the Borrower may merge or consolidate with another Person in a transaction otherwise permitted by Section 8.5 or (c) the Borrower or a Subsidiary of the Borrower may merge or consolidate with or into another Person if the following conditions are satisfied:

(i) if such transaction involves total consideration (cash and non-cash) in excess of $100,000,000, the Administrative Agent is given prior written notice of such action;

(ii) if the merger or consolidation involves a Credit Party, the surviving entity of such merger or consolidation shall either (A) be such Credit Party or (B) be a Subsidiary of the Borrower and expressly assume in writing all of the obligations of such Credit Party under the Credit Documents; provided that if the transaction is between the Borrower and another Person, the Borrower must be the surviving entity;

(iii) the Credit Parties execute and deliver such documents, instruments and certificates as the Administrative Agent may reasonably request; and

(iv) immediately after giving effect to such transaction, no Default or Event of Default shall have occurred and be continuing.

8.5 Sale or Lease of Assets.

The Borrower will not, nor will it permit its Subsidiaries to, convey, sell, lease, transfer or otherwise voluntarily dispose of, in one transaction or a series of transactions, all or any part of its business or assets whether now owned or hereafter acquired, including, without limitation, inventory, receivables, equipment, real property interests (whether owned or leasehold) and securities, other than a sale, lease, transfer or other disposal of (a) subject to Sections 7.12 and 7.13, assets from the Borrower or one of its Subsidiaries to each other; (b) inventory and supplies in the ordinary course of business;
(c) obsolete, surplus, slow-moving, idle or worn-out assets no longer used or useful in the business of such Credit Party or the trade-in of equipment for equipment in better condition or of better quality; (d) assets which constitute a Permitted Investment in the ordinary course of business; (e) Receivables pursuant to a Permitted Receivables Financing; (f) Investments in the Strategic Investments Portfolio and (g) assets of the Borrower and its

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Subsidiaries, in addition to those permitted above in this Section 8.5; provided that in the case of this clause (g) (i) no Event of Default exists prior to such transfer, (ii) no Default or Event of Default exists after giving effect to such transfer and (iii) after giving effect to such transfer, the aggregate amount of all such transfers, calculated on a net book value basis, does not exceed ten percent (10%) of Total Assets, as determined on the last day of the most recently ended fiscal quarter of the Borrower for which an officer's certificate has been delivered pursuant to Section 7.1(c).

8.6 Investments.

The Borrower will not, nor will it permit its Subsidiaries to, make or permit to exist any Investments except for Permitted Investments.

8.7 Transactions with Affiliates.

The Borrower will not, nor will it permit its Subsidiaries to, enter into any transaction or series of transactions, whether or not in the ordinary course of business, with any officer, director, shareholder, Subsidiary or Affiliate other than on terms and conditions substantially as favorable as would be obtainable in a comparable arm's-length transaction with a Person other than an officer, director, shareholder, Subsidiary or Affiliate, except that, notwithstanding the foregoing, each of the following shall be permitted: (a) transactions between or among the Credit Parties; (b) transactions between or among the Borrower and its wholly owned Subsidiaries as long as such transaction is not disadvantageous to the Lenders in any material respect; (c) transactions between or among the Borrower or one or more of its wholly owned Subsidiaries (on the one hand) and one of the non-wholly owned Subsidiaries of the Borrower (on the other hand) as long as none of the equity of such non-wholly owned Subsidiary is owned or controlled by an officer or director of any Credit Party;
(d) advances to employees permitted by clause (f) of the definition of Permitted Investments; (e) Dividends; (f) fees, compensation and other benefits paid to, and customary indemnity and reimbursement provided on behalf of, officers, directors and employees of any Credit Party in the ordinary course of business;
(g) any employment agreements entered into by the Borrower or any of its Subsidiaries in the ordinary course of business; (h) any Permitted Receivables Financing; (i) the SBCL Acquisition Agreement and each agreement contemplated thereunder (including any registration rights agreement or purchase agreement related thereto) as in effect on the Closing Date and (j) transactions and agreements in existence on the Closing Date and listed on Schedule 8.7 and, in each case, any amendment thereto, that is not disadvantageous to the Lenders in any material respect.

8.8 Fiscal Year; Accounting; Organizational Documents.

The Borrower will not, nor will it permit its Subsidiaries to, unless such action would not affect the calculation of the financial covenants in
Section 7.2 or would not or would not reasonably be likely to affect the rights of the Lenders under the Credit Documents: (a) change its fiscal year other than changing the fiscal year of a Subsidiary of the Borrower to a calendar year end,
(b) change its accounting procedures, except as a result of changes in GAAP and in accordance with Section 1.3 or (c) change its organizational or governing documents.

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8.9 Stock Repurchases.

The Borrower will not, nor will it permit its Subsidiaries to, directly or indirectly, purchase, redeem or otherwise acquire or retire or make any provisions for redemption, acquisition or retirement of any shares of the Capital Stock of the Borrower of any class or any warrants or options to purchase any such shares (collectively, a "Stock Repurchase"); provided that the Borrower or its Subsidiaries may consummate Stock Repurchases (a) in an amount up to $50,000,000, in the aggregate, during any consecutive period during the term of this Credit Agreement that the Leverage Ratio is greater than or equal to 2.75 to 1.0 and (b) in an unlimited amount as long as (i) the Leverage Ratio (A) as of the end of the most recent fiscal quarter of the Borrower for which an officer's certificate has been delivered pursuant to Section 7.1(c) is less than 2.75 to 1.0 and (B) on a Pro Forma Basis giving effect to such Stock Repurchase, is less than 2.75 to 1.0, (ii) if (A) the amount of Stock Repurchases during the lesser of (x) the twelve month period preceding the anticipated Stock Repurchase or (y) the period from the date of the last certificate delivered pursuant to this clause (ii) and the date of the anticipated Stock Repurchase plus (B) the amount of the anticipated Stock Repurchase exceeds, in the aggregate, $100,000,000, the Borrower shall deliver to the Administrative Agent, prior to making such Stock Repurchase, a certificate of an Authorized Officer of the Borrower providing calculations showing that the requirement in clause (b)(i)(B) above is accurate, (iii) on the date of such Stock Repurchase no Event of Default exists and (iv) after giving effect to such Stock Repurchase no Default or Event of Default exists.

8.10 Sale/Leasebacks.

(a) Except as set forth in clause (b) below, the Borrower will not, and will not permit any Subsidiary to, enter into any Sale and Leaseback Transaction with respect to any Principal Property unless:

(i) the Sale and Leaseback Transaction is solely with the Borrower or a Guarantor; or

(ii) the lease is for a period not in excess of five years, including renewal rights; or

(iii) prior to or within 270 days after the completion of the sale of such Principal Property in connection with the Sale and Leaseback Transaction, the Borrower or its Subsidiary applies the net cash proceeds of the sale of such Principal Property to: (A) the prepayment of the Term Loans or the Revolving Loans (with a corresponding permanent reduction in the Revolving Committed Amount) or the prepayment of debt ranking equally with the Loans; or (B) the acquisition of different property, facilities or equipment or the expansion of the Borrower and its Subsidiaries' existing business, including the acquisition of other businesses.

(b) In addition to the Sale and Leaseback Transactions permitted by clause (a) above, the Borrower or any of its Subsidiaries may enter into any Sale and Leaseback

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Transactions if all Attributable Debt (measured, in each case, at the time such Sale and Leaseback Transaction is entered into by the Borrower or its Subsidiary) in respect of such Sale and Leaseback Transactions (not including any Sale and Leaseback Transactions permitted under clause (a) above), in the aggregate, does not exceed 5% of Total Assets.

SECTION 9

EVENTS OF DEFAULT

9.1 Events of Default.

An Event of Default shall exist upon the occurrence, and during the continuation, of any of the following specified events (each an "Event of Default"):

(a) Payment. Any Credit Party shall default in the payment (i) when due of any principal of any of the Loans or any reimbursement obligation arising from drawings under Letters of Credit or (ii) within three Business Days of when due of any interest on the Loans or any fees or other amounts owing hereunder, under any of the other Credit Documents or in connection herewith.

(b) Representations. Any representation, warranty or statement made or deemed to be made by any Credit Party herein, in any of the other Credit Documents, or in any statement or certificate delivered or required to be delivered pursuant hereto or thereto shall prove untrue in any material respect on the date as of which it was made or deemed to have been made.

(c) Covenants. Any Credit Party shall:

(i) default in the due performance or observance of any term, covenant or agreement contained in Sections 7.2, 7.3, 7.10, 7.12 or 7.13 or Section 8 inclusive;

(ii) default in the due performance or observance by it of any term, covenant or agreement contained in Section 7.1 (excepting Section 7.1(e) for which the unremedied period shall only be five Business Days) and 7.11 and such default shall continue unremedied for a period of ten Business Days; or

(iii) default in the due performance or observance by it of any term, covenant or agreement (other than those referred to in subsections (a), (b) or (c)(i) or (ii) of this
Section 9.1) contained in this Credit Agreement and such default shall continue unremedied for a period of at least 30 days after the earlier of an Authorized Officer of the Borrower becoming aware of such default or notice thereof given by the Administrative Agent.

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(d) Other Credit Documents. (i) Any Credit Party shall default in the due performance or observance of any term, covenant or agreement in any of the other Credit Documents and such default shall continue unremedied for a period of at least 30 days after the earlier of an Authorized Officer of the Borrower becoming aware of such default or notice thereof given by the Administrative Agent, (ii) any Credit Document shall fail to be in full force and effect or any Credit Party shall so assert or (iii) any Credit Document shall fail to give the Administrative Agent and/or the Lenders the rights, powers and privileges purported to be created by such Credit Document.

(e) Guaranties. The guaranty given by the Credit Parties hereunder or by any Additional Credit Party or material provision thereof shall cease to be in full force and effect, or any Guarantor or any Person acting by or on behalf of such Guarantor shall deny or disaffirm such Guarantor's obligations under such guaranty or such Guarantor shall default in the due payment or performance of such guaranty.

(f) Bankruptcy, etc. The occurrence of any of the following with respect to a Credit Party (i) a court or governmental agency having jurisdiction in the premises shall enter a decree or order for relief in respect of a Credit Party in an involuntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or appoint a receiver, liquidator, assignee, custodian, trustee, sequestrator, administrator or similar official of a Credit Party or for any substantial part of its Property or ordering the winding up or liquidation of, or an administrator in respect of, its affairs; or (ii) an involuntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect is commenced against a Credit Party and such petition remains unstayed and in effect for a period of 60 consecutive days; or (iii) a Credit Party shall commence a voluntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case under any such law, or consent to the appointment or taking possession by a receiver, liquidator, assignee, custodian, trustee, sequestrator, administrator or similar official of such Person or any substantial part of its Property or make any general assignment for the benefit of creditors; or (iv) a Credit Party shall fail generally, or shall admit in writing its inability, to pay its debts as they become due or any action shall be taken by such Person in furtherance of any of the aforesaid purposes.

(g) Defaults under Other Indebtedness. With respect to any Indebtedness in excess of $50,000,000 (other than Indebtedness outstanding under this Credit Agreement) of the Borrower or any of its Subsidiaries (A) such Person shall (x) default in any payment (beyond the applicable grace period with respect thereto, if any) with respect to any such Indebtedness, or (y) default (after giving effect to any applicable grace period) in the observance or performance relating to such Indebtedness or contained in any instrument or agreement evidencing, securing or relating thereto, or any other event or condition shall occur or condition exist, the effect of which default or other event or condition is to cause, or permit, the holder or holders of such Indebtedness (or trustee or agent on behalf of such holders, if any) to require (determined without regard to whether any notice or lapse of time is required) any such Indebtedness to become due prior to its stated maturity; or (B) any such Indebtedness shall be declared due and payable, or required to be prepaid other than by

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a regularly scheduled required prepayment prior to the stated maturity thereof; or (C) any such Indebtedness shall mature and remain unpaid.

(h) Judgments. One or more judgments, orders, or decrees shall be entered against any one or more of the Borrower and its Subsidiaries involving a liability of $50,000,000 or more, in the aggregate, (to the extent not paid, covered by insurance provided by a carrier who has acknowledged coverage or covered by an indemnification from Corning Incorporated or SmithKline Beecham PLC) and such judgments, orders or decrees (i) are the subject of any enforcement proceeding commenced by any creditor or (ii) shall continue unsatisfied, undischarged and unstayed for a period ending on the first to occur of (A) the last day on which such judgment, order or decree becomes final and unappealable or (B) 60 days.

(i) ERISA. The occurrence of any of the following events or conditions which individually or in the aggregate has had or would reasonably be expected to have a Material Adverse Effect: (i) any "accumulated funding deficiency," as such term is defined in Section 302 of ERISA and Section 412 of the Code, whether or not waived, shall exist with respect to any Plan, other than a Multiemployer Plan, or any Lien shall arise on the assets of the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate in favor of the PBGC or a Plan, other than a Multiemployer Plan; (ii) an ERISA Event shall occur with respect to a Single Employer Plan, which is reasonably likely to result in the termination of such Plan for purposes of Title IV of ERISA; (iii) an ERISA Event shall occur with respect to a Multiemployer Plan or Multiple Employer Plan, which is reasonably likely to result in (A) the termination of such plan for purposes of Title IV of ERISA, or (B) the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate incurring any liability in connection with a withdrawal from, reorganization of (within the meaning of Section 4241 of ERISA), or insolvency (within the meaning of Section 4245 of ERISA) of such plan;
(iv) any prohibited transaction (within the meaning of Section 406 of ERISA or Section 4975 of the Code) or breach of fiduciary responsibility shall occur which may subject the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate to any liability under Sections 406, 409, 502(i), or 502(l) of ERISA or Section 4975 of the Code, or under any agreement or other instrument pursuant to which the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate has agreed or is required to indemnify any Person against any such liability; or (v) the Borrower, any Subsidiary of the Borrower or any ERISA Affiliate fails to pay when due, after the expiration of any applicable grace period, any installment payment with respect to its withdrawal liability under Section 4201 of ERISA under a Multiemployer Plan in an aggregate amount in excess of $50,000,000.

(j) Ownership. There shall occur a Change of Control.

9.2 Acceleration; Remedies.

Upon the occurrence and during the continuation of an Event of Default, the Administrative Agent may or shall, upon the request and direction of the Required Lenders, take the following actions without prejudice to the rights of the Administrative Agent or any Lender to enforce its claims against the Credit Parties, except as otherwise specifically provided for herein:

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(a) Termination of Commitments. Declare the Commitments terminated whereupon the Commitments shall be immediately terminated.

(b) Acceleration of Loans. Declare the unpaid principal of and any accrued interest in respect of all Loans, any reimbursement obligations arising from drawings under Letters of Credit and any and all other Indebtedness or obligations of any and every kind owing by a Credit Party to any of the Lenders under the Credit Documents to be due whereupon the same shall be immediately due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby waived by the Credit Parties.

(c) Cash Collateral. Direct the Borrower to pay (and the Borrower agrees that upon receipt of such notice, or upon the occurrence of an Event of Default under Section 9.1(f), it will immediately pay) to the Administrative Agent additional cash, to be held by the Administrative Agent, for the benefit of the Lenders, in a cash collateral account as additional security for the LOC Obligations in respect of subsequent drawings under all then outstanding Letters of Credit in an amount equal to the maximum aggregate amount which may be drawn under all Letters of Credits then outstanding.

(d) Enforcement of Rights. To the extent permitted by law, enforce any and all rights and interests created and existing under the Credit Documents, including, without limitation, all rights and remedies against a Guarantor and all rights of set-off.

Notwithstanding the foregoing, if an Event of Default specified in Section 9.1(f) shall occur, then the Commitments shall automatically terminate and all Loans, all reimbursement obligations under Letters of Credit, all accrued interest in respect thereof, all accrued and unpaid fees and other indebtedness or obligations owing to the Lenders hereunder shall immediately become due and payable without the giving of any notice or other action by the Administrative Agent or the Lenders, which notice or other action is expressly waived by the Credit Parties.

Notwithstanding the fact that enforcement powers reside primarily with the Administrative Agent, each Lender has, to the extent permitted by law, a separate right of payment and shall be considered a separate "creditor" holding a separate "claim" within the meaning of Section 101(5) of the Bankruptcy Code or any other insolvency statute.

9.3 Allocation of Payments After Event of Default.

Notwithstanding any other provisions of this Credit Agreement, after the occurrence and during the continuation of an Event of Default, all amounts collected or received by the Administrative Agent or any Lender on account of amounts outstanding under any of the Credit Documents shall be paid over or delivered as follows:

FIRST, to the payment of all reasonable out-of-pocket costs and expenses (including without limitation reasonable Attorney Costs) of the Administrative Agent or any of the Lenders in connection with enforcing the rights of the Lenders under the Credit Documents, pro rata as set forth below;

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SECOND, to payment of any fees owed to the Administrative Agent, the Issuing Lender, the Swing Line Lender or any Lender, pro rata as set forth below;

THIRD, to the payment of all accrued interest payable to the Lenders hereunder, pro rata as set forth below;

FOURTH, to the payment of the outstanding principal amount of the Loans and unreimbursed drawings under Letters of Credit, and to the payment or cash collateralization of the outstanding LOC Obligations, pro rata as set forth below;

FIFTH, to all other obligations which shall have become due and payable under the Credit Documents and not repaid pursuant to clauses "FIRST" through "FOURTH" above; and

SIXTH, to the payment of the surplus, if any, to whoever may be lawfully entitled to receive such surplus.

In carrying out the foregoing, (a) amounts received shall be applied in the numerical order provided until exhausted prior to application to the next succeeding category; (b) each of the Lenders shall receive an amount equal to its pro rata share (based on the proportion that the then outstanding Loans, and LOC Obligations held by such Lender bears to the aggregate then outstanding Loans and LOC Obligations of amounts available to be applied; and (c) to the extent that any amounts available for distribution pursuant to clause "FOURTH" above are attributable to the issued but undrawn amount of outstanding Letters of Credit, such amounts shall be held by the Administrative Agent in a cash collateral account and applied (i) first, to reimburse the Issuing Lender from time to time for any drawings under such Letters of Credit and (ii) then, following the expiration of all Letters of Credit, to all other obligations of the types described in clauses "FOURTH" and "FIFTH" above in the manner provided in this Section 9.3.

SECTION 10

AGENCY PROVISIONS

10.1 Appointment.

(a) Each Lender hereby irrevocably appoints, designates and authorizes the Administrative Agent to take such action on its behalf under the provisions of this Credit Agreement and each other Credit Document and to exercise such powers and perform such duties as are expressly delegated to it by the terms of this Credit Agreement or any other Credit Document, together with such powers as are reasonably incidental thereto. Notwithstanding any provision to the contrary contained elsewhere herein or in any other Credit Document, the Administrative Agent shall not have any duties or responsibilities, except those expressly set forth herein, nor shall the Administrative Agent have or be

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deemed to have any fiduciary or trustee relationship with any Lender or participant, and no implied covenants, functions, responsibilities, duties, obligations or liabilities shall be read into this Credit Agreement or any other Credit Document or otherwise exist against the Administrative Agent. Without limiting the generality of the foregoing sentence, the use of the term "agent" herein and in the other Credit Documents with reference to the Administrative Agent is not intended to connote any fiduciary or other implied (or express) obligations arising under agency doctrine of any applicable law. Instead, such term is used merely as a matter of market custom, and is intended to create or reflect only an administrative relationship between independent contracting parties.

(b) The Issuing Lender shall act on behalf of the Lenders with respect to any Letters of Credit issued by it and the documents associated therewith until such time (and except for so long) as the Administrative Agent may agree at the request of the Required Lenders to act for the Issuing Lender with respect thereto; provided, however, that the Issuing Lender shall have all of the benefits and immunities
(i) provided to the Administrative Agent in this Section 10 with respect to any acts taken by or omissions of the Issuing Lender in connection with Letters of Credit issued by it or proposed to be issued by it and the application and agreements for letters of credit pertaining to the Letters of Credit as fully as if the term "Administrative Agent" as used in this Section 10 included the Issuing Lender with respect to such acts or omissions, and (ii) as additionally provided herein with respect to the Issuing Lender.

(c) Each of (i) UBS AG, Stamford Branch and Merrill Lynch Capital Corporation in their capacities as Co-Syndication Agents, (ii) Credit Suisse First Boston and The Bank of New York in their capacities as Co-Documentation Agents and (iii) Wachovia Bank, N.A. in its capacity as Managing Agent shall have no duties or obligations whatsoever under this Credit Agreement or the other Credit Documents.

10.2 Delegation of Duties.

The Administrative Agent may execute any of its duties under this Credit Agreement or any other Credit Document by or through agents, employees or attorneys-in-fact and shall be entitled to advice of counsel and other consultants or experts concerning all matters pertaining to such duties. The Administrative Agent shall not be responsible for the negligence or misconduct of any agent or attorney-in-fact that it selects with reasonable care.

10.3 Exculpatory Provisions.

No Agent-Related Person shall (a) be liable for any action taken or omitted to be taken by any of them under or in connection with this Credit Agreement or any other Credit Document or the transactions contemplated hereby (except for its own gross negligence or willful misconduct in connection with its duties expressly set forth herein), or (b) be responsible in any manner to any Lender or participant for any recital, statement, representation or warranty made by any Credit Party or any officer thereof, contained herein or in any other Credit Document, or in any certificate, report, statement or other document referred to or provided for in, or received by the Administrative Agent under or in connection with, this Credit Agreement or any other Credit

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Document, or the validity, effectiveness, genuineness, enforceability or sufficiency of this Credit Agreement or any other Credit Document, or for any failure of any Credit Party or any other party to any Credit Document to perform its obligations hereunder or thereunder. No Agent-Related Person shall be under any obligation to any Lender or participant to ascertain or to inquire as to the observance or performance of any of the agreements contained in, or conditions of, this Credit Agreement or any other Credit Document, or to inspect the properties, books or records of any Credit Party or any Affiliate thereof.

10.4 Reliance on Communications.

(a) The Administrative Agent shall be entitled to rely, and shall be fully protected in relying, upon any writing, communication, signature, resolution, representation, notice, consent, certificate, affidavit, letter, telegram, facsimile, telex or telephone message, statement or other document or conversation believed by it to be genuine and correct and to have been signed, sent or made by the proper Person or Persons, and upon advice and statements of legal counsel (including counsel to any Credit Party), independent accountants and other experts selected by the Administrative Agent. The Administrative Agent may deem and treat each Lender as the owner of its interests hereunder for all purposes unless a written notice of assignment, negotiation or transfer thereof shall have been delivered to the Administrative Agent in accordance with Section 11.3(b). The Administrative Agent shall be fully justified in failing or refusing to take any action under any Credit Document unless it shall first receive such advice or concurrence of the Required Lenders as it deems appropriate and, if it so requests, it shall first be indemnified to its satisfaction by the Lenders against any and all liability and expense which may be incurred by it by reason of taking or continuing to take any such action. The Administrative Agent shall in all cases be fully protected in acting, or in refraining from acting, under this Credit Agreement or any other Credit Document in accordance with a request or consent of the Required Lenders or all the Lenders, if required hereunder, and such request and any action taken or failure to act pursuant thereto shall be binding upon all the Lenders and participants, and their respective successors and assigns. Where this Credit Agreement expressly permits or prohibits an action unless the Required Lenders otherwise determine, the Administrative Agent shall, and in all other instances, the Administrative Agent may, but shall not be required to, initiate any solicitation for the consent or a vote of the Lenders.

(b) For purposes of determining compliance with the conditions specified in Section 5.1, each Lender that has signed this Credit Agreement shall be deemed to have consented to, approved or accepted or to be satisfied with, each document or other matter either sent by the Administrative Agent to such Lender for consent, approval, acceptance or satisfaction, or required thereunder to be consented to or approved by or acceptable or satisfactory to a Lender.

10.5 Notice of Default.

The Administrative Agent shall not be deemed to have knowledge or notice of the occurrence of any Default or Event of Default, except with respect to defaults in the payment of

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principal, interest and fees required to be paid to the Administrative Agent for the account of the Lenders, unless the Administrative Agent shall have received written notice from a Lender or the Borrower referring to this Credit Agreement, describing such Default or Event of Default and stating that such notice is a "notice of default." The Administrative Agent will notify the Lenders of its receipt of any such notice. The Administrative Agent shall take such action with respect to such Default or Event of Default as may be reasonably directed by the Required Lenders in accordance with Section 9.2; provided, however, that unless and until the Administrative Agent has received any such direction, the Administrative Agent may (but shall not be obligated to) take such action, or refrain from taking such action, with respect to such Default or Event of Default as it shall deem advisable or in the best interest of the Lenders.

10.6 Non-Reliance on Administrative Agent and Other Lenders.

Each Lender acknowledges that no Agent-Related Person has made any representation or warranty to it, and that no act by the Administrative Agent hereinafter taken, including any consent to and acceptance of any assignment or review of the affairs of any Credit Party or any Affiliate thereof, shall be deemed to constitute any representation or warranty by any Agent-Related Person to any Lender as to any matter, including whether Agent-Related Persons have disclosed material information in their possession. Each Lender represents to the Administrative Agent that it has, independently and without reliance upon any Agent-Related Person or any other Lender and based on such documents and information as it has deemed appropriate, made its own appraisal of and investigation into the business, prospects, operations, Property, financial and other condition and creditworthiness of the Credit Parties and their respective Affiliates, and all applicable bank or other regulatory laws relating to the transactions contemplated hereby, and made its own decision to enter into this Credit Agreement and to extend credit to the Borrower hereunder. Each Lender also represents that it will, independently and without reliance upon any Agent-Related Person or any other Lender and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit analysis, appraisals and decisions in taking or not taking action under this Credit Agreement and the other Credit Documents, and to make such investigations as it deems necessary to inform itself as to the business, prospects, operations, Property, financial and other condition and creditworthiness of the Borrower. Except for notices, reports and other documents expressly required to be furnished to the Lenders by the Administrative Agent herein, the Administrative Agent shall not have any duty or responsibility to provide any Lender with any credit or other information concerning the business, prospects, operations, Property, financial and other condition or creditworthiness of any of the Credit Parties or any of their respective Affiliates which may come into the possession of any Agent-Related Person.

10.7 Indemnification.

Whether or not the transactions contemplated hereby are consummated, the Lenders shall indemnify upon demand each Agent-Related Person (to the extent not reimbursed by or on behalf of any Credit Party and without limiting the obligation of any Credit Party to do so), pro rata, and hold harmless each Agent-Related Person from and against any and all Indemnified Liabilities incurred by it; provided, however, that no Lender shall be liable for the payment to any Agent-Related Person of any portion of such Indemnified Liabilities resulting from such

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Agent-Related Person's gross negligence or willful misconduct; it being understood that no action taken in accordance with the directions of the Required Lenders shall be deemed to constitute gross negligence or willful misconduct for purposes of this Section 10.7. Without limitation of the foregoing, each Lender shall reimburse the Administrative Agent upon demand for its ratable share of any costs or out-of-pocket expenses (including Attorney Costs) incurred by the Administrative Agent in connection with the preparation, execution, delivery, administration, modification, amendment or enforcement (whether through negotiations, legal proceedings or otherwise) of, or legal advice in respect of rights or responsibilities under, this Credit Agreement, any other Credit Document, or any document contemplated by or referred to herein, to the extent that the Administrative Agent is not reimbursed for such expenses by or on behalf of the Credit Parties. The undertaking in this Section 10.7 shall survive termination of the Commitments, the payment of all Obligations hereunder and the resignation or replacement of the Administrative Agent.

10.8 Administrative Agent in Its Individual Capacity.

Bank of America and its Affiliates may make loans to, issue letters of credit for the account of, accept deposits from, acquire equity interests in and generally engage in any kind of banking, trust, financial advisory, underwriting or other business with each of the Credit Parties and their respective Affiliates as though Bank of America were not the Administrative Agent or the Issuing Lender hereunder and without notice to or consent of the Lenders. The Lenders acknowledge that, pursuant to such activities, Bank of America or its Affiliates may receive information regarding any Credit Party or its Affiliates (including information that may be subject to confidentiality obligations in favor of such Credit Party or such Affiliate) and that the Administrative Agent shall be under no obligation to provide such information to them. With respect to its Loans, Bank of America shall have the same rights and powers under this Credit Agreement as any other Lender and may exercise such rights and powers as though it were not the Administrative Agent or the Issuing Lender, and the terms "Lender" and "Lenders" include Bank of America in its individual capacity.

10.9 Successor Agent.

The Administrative Agent may resign as Administrative Agent upon 30 days' notice to the Lenders. If the Administrative Agent resigns under this Credit Agreement, the Required Lenders shall appoint from among the Lenders a successor administrative agent for the Lenders which successor administrative agent (such appointment, absent the existence of an Event of Default, to be subject to the consent of the Borrower, which consent of the Borrower shall not be unreasonably withheld or delayed). If no successor administrative agent is appointed prior to the effective date of the resignation of the Administrative Agent, the Administrative Agent may appoint, after consulting with the Lenders and the Borrower, a successor administrative agent from among the Lenders. Upon the acceptance of its appointment as successor administrative agent hereunder, such successor administrative agent shall succeed to all the rights, powers and duties of the retiring Administrative Agent and the term "Administrative Agent" shall mean such successor administrative agent and the retiring Administrative Agent's appointment, powers and duties as Administrative Agent shall be terminated. After any retiring Administrative Agent's resignation hereunder as Administrative Agent, the provisions of this Section 10 and Sections

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11.5 and 11.10 shall continue to inure to its benefit as to any actions taken or omitted to be taken by it while it was Administrative Agent under this Credit Agreement. If no successor administrative agent has accepted appointment as Administrative Agent by the date which is 30 days following a retiring Administrative Agent's notice of resignation, the retiring Administrative Agent's resignation shall nevertheless thereupon become effective and the Lenders shall perform all of the duties of the Administrative Agent hereunder until such time, if any, as the Required Lenders appoint a successor agent as provided for above.

SECTION 11

MISCELLANEOUS

11.1 Notices.

Except as otherwise expressly provided herein, all notices and other communications shall have been duly given and shall be effective (a) when delivered, (b) when transmitted via telecopy (or other facsimile device) to the number set forth on Schedule 11.1, (c) the Business Day following the day on which the same has been delivered prepaid (or subject to an invoice arrangement) to a reputable national overnight air courier service, or (d) the third Business Day following the day on which the same is sent by certified or registered mail, postage prepaid, in each case to the respective parties at the address or telecopy numbers set forth on Schedule 11.1, or at such other address as such party may specify by written notice to the other parties hereto.

11.2 Right of Set-Off.

In addition to any rights now or hereafter granted under applicable law or otherwise, and not by way of limitation of any such rights, upon the occurrence of an Event of Default and the commencement of remedies described in Section 9.2, each Lender is authorized at any time and from time to time, without presentment, demand, protest or other notice of any kind (all of which rights being hereby expressly waived), to set-off and to appropriate and apply any and all deposits (general or special) and any other indebtedness at any time held or owing by such Lender (including, without limitation, branches, agencies or Affiliates of such Lender wherever located) to or for the credit or the account of any Credit Party against obligations and liabilities of such Credit Party to the Lenders hereunder, under the Notes, the other Credit Documents or otherwise, irrespective of whether the Administrative Agent or the Lenders shall have made any demand hereunder and although such obligations, liabilities or claims, or any of them, may be contingent or unmatured, and any such set-off shall be deemed to have been made immediately upon the occurrence of an Event of Default even though such charge is made or entered on the books of such Lender subsequent thereto. The Credit Parties hereby agree that any Person purchasing a participation in the Loans and Commitments hereunder pursuant to Sections 11.3(e) or 3.8 may exercise all rights of set-off with respect to its participation interest as fully as if such Person were a Lender hereunder.

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11.3 Benefit of Agreement.

(a) Generally. This Credit Agreement shall be binding upon and inure to the benefit of and be enforceable by the respective successors and assigns of the parties hereto; provided that none of the Credit Parties may assign and transfer any of its interests (except as permitted by Section 8.4 or 8.5) without the prior written consent of the Lenders; and provided further that the rights of each Lender to transfer, assign or grant participations in its rights and/or obligations hereunder shall be limited as set forth below in this
Section 11.3.

(b) Assignments. Each Lender may assign to one or more Eligible Assignees all or a portion of its rights and obligations under this Credit Agreement (including, without limitation, all or a portion of its Loans, its Notes, and its Commitment); provided, however, that:

(i) each such assignment shall be to an Eligible Assignee;

(ii) except (A) in the case of an assignment to another Lender, (B) in the case of an assignment of all of a Lender's rights and obligations under this Credit Agreement, or (C) with the consent of the Administrative Agent and the Borrower, any such partial assignment shall be in an amount at least equal to $5,000,000 (or, if less, the remaining amount of the Commitment of such assigning Lender) or an integral multiple of $500,000 in excess thereof;

(iii) each such assignment by a Lender shall be of a constant, and not varying, percentage of all of its rights and obligations under this Credit Agreement and the Notes; and

(iv) the parties to such assignment shall execute and deliver to the Administrative Agent for its acceptance an Assignment Agreement in substantially the form of Exhibit 11.3(b), together with a processing fee from the assignor of $3,500.

Upon execution, delivery, and acceptance of such Assignment Agreement, the assignee thereunder shall be a party hereto and, to the extent of such assignment, have the obligations, rights, and benefits of a Lender hereunder and the assigning Lender shall, to the extent of such assignment, relinquish its rights and be released from its obligations under this Credit Agreement. Upon the consummation of any assignment pursuant to this Section 11.3(b), the assignor, the Administrative Agent and the Borrower shall make appropriate arrangements so that, if required or requested, new Notes are issued to the assignor and the assignee. If the assignee is a foreign corporation, foreign partnership or foreign trust within the meaning of the Code, it shall deliver to the Borrower and the Administrative Agent certification as to exemption from deduction or withholding of taxes in accordance with Section 3.13.

By executing and delivering an assignment agreement in accordance with this Section 11.3(b), the assigning Lender thereunder and the assignee thereunder shall be deemed to

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confirm to and agree with each other and the other parties hereto as follows: (A) such assigning Lender warrants that it is the legal and beneficial owner of the interest being assigned thereby free and clear of any adverse claim and the assignee warrants that it is an Eligible Assignee; (B) except as set forth in clause (A) above, such assigning Lender makes no representation or warranty and assumes no responsibility with respect to any statements, warranties or representations made in or in connection with this Credit Agreement, any of the other Credit Documents or any other instrument or document furnished pursuant hereto or thereto, or the execution, legality, validity, enforceability, genuineness, sufficiency or value of this Credit Agreement, any of the other Credit Documents or any other instrument or document furnished pursuant hereto or thereto or the financial condition of any Credit Party or the performance or observance by any Credit Party of any of its obligations under this Credit Agreement, any of the other Credit Documents or any other instrument or document furnished pursuant hereto or thereto; (C) such assignee represents and warrants that it is legally authorized to enter into such assignment agreement; (D) such assignee confirms that it has received a copy of this Credit Agreement, the other Credit Documents and such other documents and information as it has deemed appropriate to make its own credit analysis and decision to enter into such assignment agreement; (E) such assignee will independently and without reliance upon the Administrative Agent, such assigning Lender or any other Lender, and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking action under this Credit Agreement and the other Credit Documents; (F) such assignee appoints and authorizes the Administrative Agent to take such action on its behalf and to exercise such powers under this Credit Agreement or any other Credit Document as are delegated to the Administrative Agent by the terms hereof or thereof, together with such powers as are reasonably incidental thereto; and (G) such assignee agrees that it will perform in accordance with their terms all the obligations which by the terms of this Credit Agreement and the other Credit Documents are required to be performed by it as a Lender.

(c) Register. The Administrative Agent shall maintain a copy of each Assignment Agreement delivered to and accepted by it and a register for the recordation of the names and addresses of the Lenders and the Commitment of, and principal amount of the Loans owing to, each Lender from time to time (the "Register"). The entries in the Register shall be conclusive and binding for all purposes, absent manifest error, and the Borrower, the Administrative Agent and the Lenders may treat each Person whose name is recorded in the Register as a Lender hereunder for all purposes of this Credit Agreement. The Register shall be available for inspection by the Borrower or any Lender at any reasonable time and from time to time upon reasonable prior notice.

(d) Acceptance. Upon its receipt of an Assignment Agreement executed by the parties thereto, together with any Note subject to such assignment and payment of the processing fee, the Administrative Agent shall, if such Assignment Agreement has been completed and is in substantially the form of Exhibit 11.3(b), (i) accept such Assignment Agreement, (ii) record the information contained therein in the Register and (iii) give prompt notice thereof to the parties thereto.

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(e) Participations. Each Lender may sell participations to one or more Persons in all or a portion of its rights, obligations or rights and obligations under this Credit Agreement (including all or a portion of its Commitment and its Loans); provided, however, that (i) such Lender's obligations under this Credit Agreement shall remain unchanged, (ii) such Lender shall remain solely responsible to the other parties hereto for the performance of such obligations, (iii) the participant shall be entitled to the benefit of the yield protection provisions contained in Sections 3.9 through 3.15, inclusive (but not for a greater amount than the Lender would be entitled to), and of the right of set-off contained in Section 11.2, (iv) the Borrower shall continue to deal solely and directly with such Lender in connection with such Lender's rights and obligations under this Credit Agreement, and (v) such Lender shall retain the sole right to enforce the obligations of the Borrower relating to its Loans and its Notes and to approve any amendment, modification, or waiver of any provision of this Credit Agreement (other than amendments, modifications, or waivers decreasing the amount of principal of or the rate at which interest is payable on such Loans or Notes, extending any scheduled principal payment date or date fixed for the payment of interest on such Loans or Notes, extending its Commitment or releasing the Borrower or all or substantially all of the Guarantors from its or their respective obligations under the Credit Documents).

(f) Unrestricted Assignments. Notwithstanding any other provision set forth in this Credit Agreement, any Lender may at any time (i) assign and pledge all or any portion of its Loans and its Notes to any Federal Reserve Bank as collateral security pursuant to Regulation A and any Operating Circular issued by such Federal Reserve Bank or (ii) pledge all or any portion of its rights (but not its obligations to make Loans or participate in Letters of Credit) hereunder to any trustee or holders of obligations owed, or securities issued, by such Lender as security for such obligations or securities or to any other representative of such holders; provided that such trustee or holder shall not have the right to become a Lender hereunder. No such assignment shall release the assigning Lender from its obligations hereunder.

(g) Information. Any Lender may furnish any information concerning the Borrower or any of its Subsidiaries in the possession of such Lender from time to time to assignees and participants (including prospective assignees and participants), subject, however, to the provisions of Section 11.15.

(h) CLO's. Notwithstanding anything to the contrary contained herein, any Lender, (a "Granting Lender") may grant to a special purpose funding vehicle (an "SPC") the option to fund all or any part of any Loan that such Granting Lender would otherwise be obligated to fund pursuant to this Credit Agreement; provided that (i) nothing herein shall constitute a commitment by any SPC to fund any Loan, (ii) if an SPC elects not to exercise such option or otherwise fails to fund all or any part of such Loan, the Granting Lender shall be obligated to fund such Loan pursuant to the terms hereof, (iii) no SPC shall have any voting rights pursuant to Section 11.6 and (iv) with respect to notices, payments and other matters hereunder, the Credit Parties, the Administrative Agent and the Lenders shall not be obligated to deal with an SPC, but may limit their communications and other dealings relevant to such SPC to the applicable Granting

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Lender. The funding of a Loan by an SPC hereunder shall utilize the Loan Commitment of the Granting Lender to the same extent that, and as if, such Loan were funded by such Granting Lender. Each party hereto hereby agrees that no SPC shall be liable for any indemnity or payment under this Credit Agreement for which a Lender would otherwise be liable for so long as, and to the extent, the Granting Lender provides such indemnity or makes such payment. Notwithstanding anything to the contrary contained in this Credit Agreement, any SPC may disclose on a confidential basis any non-public information relating to its funding of Loans to any rating agency, commercial paper dealer or provider of any surety or guarantee to such SPC. This clause (h) may not be amended without the prior written consent of each Granting Lender, all or any part of whose Loan is being funded by an SPC at the time of such amendment.

11.4 No Waiver; Remedies Cumulative.

No failure or delay on the part of the Administrative Agent or any Lender in exercising any right, power or privilege hereunder or under any other Credit Document and no course of dealing between the Borrower or any Credit Party and the Administrative Agent or any Lender shall operate as a waiver thereof; nor shall any single or partial exercise of any right, power or privilege hereunder or under any other Credit Document preclude any other or further exercise thereof or the exercise of any other right, power or privilege hereunder or thereunder. The rights and remedies provided herein are cumulative and not exclusive of any rights or remedies which the Administrative Agent or any Lender would otherwise have. No notice to or demand on any Credit Party in any case shall entitle any Credit Party to any other or further notice or demand in similar or other circumstances or constitute a waiver of the rights of the Administrative Agent or the Lenders to any other or further action in any circumstances without notice or demand.

11.5 Payment of Expenses; Indemnification.

The Borrower agrees to: (a) pay all reasonable out-of-pocket costs and expenses of (i) the Administrative Agent and BAS in connection with (A) the negotiation, preparation, execution and delivery, syndication and administration of this Credit Agreement and the other Credit Documents and the documents and instruments referred to therein (including, without limitation, the reasonable fees and expenses of Moore & Van Allen, special counsel to the Administrative Agent) and (B) any amendment, waiver or consent relating hereto and thereto including, but not limited to, any such amendments, waivers or consents resulting from or related to any work-out, renegotiation or restructure relating to the performance by the Credit Parties under this Credit Agreement, and (ii) the Administrative Agent and the Lenders in connection with (A) enforcement of the Credit Documents and the documents and instruments referred to therein, including, without limitation, in connection with any such enforcement, the reasonable Attorneys' Costs of the Administrative Agent and each of the Lenders and (B) any bankruptcy or insolvency proceeding of any Credit Party, and (b) indemnify the Administrative Agent, BAS and each Lender, its officers, directors, employees, representatives, counsel and agents from and hold each of them harmless against any and all losses, liabilities, claims, damages or expenses incurred by any of them as a result of, or arising out of, or in any way related to, or by reason of, any investigation, litigation or other proceeding (whether or not the Administrative Agent, BAS or any Lender is a party thereto) related to the entering into and/or performance of any Credit Document or the use of proceeds of any Loans (including other

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extensions of credit) hereunder or the consummation of any other transactions contemplated in any Credit Document, including, without limitation, reasonable Attorneys' Costs incurred in connection with any such investigation, litigation or other proceeding (but excluding any such losses, liabilities, claims, damages or expenses to the extent incurred by reason of gross negligence or willful misconduct on the part of the Person to be indemnified), (all of the foregoing, collectively, "Indemnified Liabilities"). The agreements in this Section 11.5 shall survive the termination of the Commitments and the repayment of the Credit Party Obligations.

11.6 Amendments, Waivers and Consents.

Neither this Credit Agreement nor any other Credit Document nor any of the terms hereof or thereof may be amended, changed, waived, discharged or terminated unless such amendment, change, waiver, discharge or termination is in writing and signed by the Required Lenders and the then Credit Parties; provided that no such amendment, change, waiver, discharge or termination shall without the consent of each Lender affected thereby:

(a) extend the Maturity Date or extend or postpone the time for any payment or prepayment of principal;

(b) reduce the rate or extend the time of payment of interest (other than as a result of waiving the applicability of any post-default increase in interest rates) thereon or fees hereunder;

(c) reduce or waive the principal amount of any Loan;

(d) increase or extend the Commitment of a Lender (it being understood and agreed that a waiver of any Default or Event of Default or a waiver of any mandatory reduction in the Commitments shall not constitute a change in the terms of any Commitment of any Lender);

(e) release the Borrower from its obligations or consent to the assignment or transfer by the Borrower of any of its rights and obligations under (or in respect of) the Credit Documents or release all or substantially all of the Guarantors from their respective obligations under the Credit Documents;

(f) amend, modify or waive any provision of this Section 11.6 or Section 3.4(a), 3.4(b)(i), 3.7, 3.8, 9.1(a), 11.2, 11.3 or 11.5; or

(g) reduce any percentage specified in, or otherwise modify, the definition of Required Lenders.

Notwithstanding the above, (i) no provisions of Section 10 may be amended or modified without the consent of the Administrative Agent, (ii) no provisions of
Section 2.2 may be amended or modified without the consent of the Issuing Lender and (iii) no provisions of Section 2.3 may be amended or modified without the consent of the Swing Line Lender.

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Notwithstanding the fact that the consent of all the Lenders is required in certain circumstances as set forth above, (x) each Lender is entitled to vote as such Lender sees fit on any reorganization plan that affects the Loans or the Letters of Credit, and each Lender acknowledges that the provisions of Section 1126(c) of the Bankruptcy Code supersedes the unanimous consent provisions set forth herein and (y) the Required Lenders may consent to allow a Credit Party to use cash collateral in the context of a bankruptcy or insolvency proceeding.

11.7 Counterparts/Telecopy.

This Credit Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument. Delivery of executed counterparts by telecopy shall be as effective as an original and shall constitute a representation that an original will be delivered.

11.8 Headings.

The headings of the sections and subsections hereof are provided for convenience only and shall not in any way affect the meaning or construction of any provision of this Credit Agreement.

11.9 Defaulting Lender.

Each Lender understands and agrees that if such Lender is a Defaulting Lender then notwithstanding the provisions of Section 11.6 it shall not be entitled to vote on any matter requiring the consent of the Required Lenders or to object to any matter requiring the consent of all the Lenders; provided, however, that all other benefits and obligations under the Credit Documents shall apply to such Defaulting Lender.

11.10 Survival of Indemnification.

All indemnities set forth herein shall survive the execution and delivery of this Credit Agreement, the making of the Loans, the issuance of the Letters of Credit and the repayment of the Loans, LOC Obligations and other obligations and the termination of the Commitments hereunder.

11.11 Governing Law; Venue; Jurisdiction.

(a) THIS CREDIT AGREEMENT AND THE OTHER CREDIT DOCUMENTS AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER AND THEREUNDER SHALL BE GOVERNED BY AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. Any legal action or proceeding with respect to this Credit Agreement or any other Credit Document may be brought in the courts of the State of New York or of the United States sitting in New York City, and, by execution and delivery of this Credit Agreement, each Credit Party hereby irrevocably accepts for itself and in respect of its Property, generally and unconditionally, the jurisdiction of such courts. Each Credit Party irrevocably consents to the service of process in any action or proceeding with respect to this Credit Agreement or any other Credit Document by the mailing of copies thereof by

91

registered or certified mail, postage prepaid, to it at the address for notices pursuant to Section 11.1, such service to become effective 10 days after such mailing. Nothing herein shall affect the right of a Lender to serve process in any other manner permitted by law or to commence legal proceedings or otherwise proceed against a Credit Party in any other jurisdiction. Each Credit Party agrees that a final judgment in any action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law; provided that nothing in this Section 11.11(a) is intended to impair a Credit Party's right under applicable law to appeal or seek a stay of any judgment.

(b) Each Credit Party hereby irrevocably waives any objection which it may now or hereafter have to the laying of venue of any of the aforesaid actions or proceedings arising out of or in connection with this Credit Agreement or any other Credit Document in the courts referred to in subsection (a) hereof and hereby further irrevocably waives and agrees not to plead or claim in any such court that any such action or proceeding brought in any such court has been brought in an inconvenient forum.

11.12 Waiver of Jury Trial; Waiver of Consequential Damages.

EACH OF THE PARTIES TO THIS CREDIT AGREEMENT HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS CREDIT AGREEMENT, ANY OF THE OTHER CREDIT DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY. Each Credit Party agrees not to assert any claim against the Administrative Agent, the Issuing Lenders, any Lender, any of their Affiliates, or any of their respective directors, officers, employees, attorneys or agents, on any theory of liability, for special, indirect, consequential or punitive damages arising out of or otherwise relating to any of the transactions contemplated herein.

11.13 Severability.

If any provision of any of the Credit Documents is determined to be illegal, invalid or unenforceable, such provision shall be fully severable and the remaining provisions shall remain in full force and effect and shall be construed without giving effect to the illegal, invalid or unenforceable provisions.

11.14 Further Assurances.

The Credit Parties agree, upon the request of the Administrative Agent, to promptly take such actions, as reasonably requested, as is necessary to carry out the intent of this Credit Agreement and the other Credit Documents.

11.15 Confidentiality.

Each Lender agrees that it will use its reasonable best efforts to keep confidential and to cause any representative designated under Section 7.11 to keep confidential any non-public information from time to time supplied to it under any Credit Document; provided, however, that nothing herein shall prevent the disclosure of any such information to (a) the extent a Lender in

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good faith believes such disclosure is required by Requirement of Law, (b) counsel for a Lender or to its accountants, (c) bank examiners or auditors or comparable Persons, (d) any Affiliate of a Lender, (e) any other Lender, or any assignee, transferee or participant, or any potential assignee, transferee or participant, of all or any portion of any Lender's rights under this Credit Agreement who is notified of the confidential nature of the information or (f) any other Person in connection with any litigation to which any one or more of the Lenders is a party if required by a court of law of competent jurisdiction. No Lender shall have any obligation under this Section 11.15 to the extent any such information becomes available on a non-confidential basis from a source other than a Credit Party or that any information becomes publicly available other than by a breach of this Section 11.15 by any Lender or representative thereof.

11.16 Entirety.

This Credit Agreement together with the other Credit Documents and the Fee Letter represent the entire agreement of the parties hereto and thereto, and supersede all prior agreements and understandings, oral or written, if any, including any commitment letters or correspondence relating to the Credit Documents or the transactions contemplated herein and therein.

11.17 Binding Effect; Continuing Agreement.

(a) This Credit Agreement shall become effective at such time when all of the conditions set forth in Section 5.1 have been satisfied or waived by the Lenders and it shall have been executed by the Borrower, the Guarantors and the Administrative Agent, and the Administrative Agent shall have received copies hereof (telefaxed or otherwise) which, when taken together, bear the signatures of each Lender, and thereafter this Credit Agreement shall be binding upon and inure to the benefit of the Borrower, the Guarantors, the Administrative Agent and each Lender and their respective successors and assigns.

(b) This Credit Agreement shall be a continuing agreement and shall remain in full force and effect until all Loans, LOC Obligations, interest, fees and other Credit Party Obligations have been paid in full and all Commitments and Letters of Credit have been terminated. Upon termination, the Credit Parties shall have no further obligations (other than the indemnification provisions that survive) under the Credit Documents; provided that should any payment, in whole or in part, of the Credit Party Obligations be rescinded or otherwise required to be restored or returned by the Administrative Agent or any Lender, whether as a result of any proceedings in bankruptcy or reorganization or otherwise, then the Credit Documents shall automatically be reinstated and all amounts required to be restored or returned and all costs and expenses incurred by the Administrative Agent or any Lender in connection therewith shall be deemed included as part of the Credit Party Obligations.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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Signature Page to Credit Agreement Quest Diagnostics Incorporated

Each of the parties hereto has caused a counterpart of this Credit Agreement to be duly executed and delivered as of the date first above written.

BORROWER:

QUEST DIAGNOSTICS INCORPORATED,
a Delaware corporation

By: /s/
   ---------------------------------
Name:
     -------------------------------
Title:
      ------------------------------


GUARANTORS:

QUEST DIAGNOSTICS HOLDINGS
INCORPORATED
a Delaware corporation

QUEST DIAGNOSTICS CLINICAL
LABORATORIES, INC.,
a Delaware corporation

QUEST DIAGNOSTICS INCORPORATED,
a California corporation

QUEST DIAGNOSTICS INCORPORATED,
a Maryland corporation

QUEST DIAGNOSTICS LLC,
an Illinois limited liability company

QUEST DIAGNOSTICS INCORPORATED,
a Michigan corporation

QUEST DIAGNOSTICS INCORPORATED,
a Connecticut corporation

QUEST DIAGNOSTICS INCORPORATED,
a Massachusetts corporation

QUEST DIAGNOSTICS OF PENNSYLVANIA, INC.,
a Delaware corporation

QUEST DIAGNOSTICS INCORPORATED,
an Ohio corporation

METWEST, INC.,
a Delaware corporation

NICHOLS INSTITUTE DIAGNOSTICS,
a California corporation

DPD HOLDINGS, INC.,
a Delaware corporation

DIAGNOSTICS REFERENCE SERVICES INC.,
a Maryland corporation


LABORATORY HOLDINGS INCORPORATED,
a Massachusetts corporation

By: /s/
   --------------------------------------------------
Name: Joseph P. Manory
      Vice President and Treasurer
      of each of the above Guarantors

PATHOLOGY BUILDING PARTNERSHIP,

a Delaware general partnership

By:  Quest Diagnostics Incorporated, a Maryland
     corporation, its general partner

     By:
        ---------------------------------------------
        Name:   Joseph P. Manory
        Title:  Vice President and Treasurer

QUEST DIAGNOSTICS INVESTMENTS INCORPORATED,
a Delaware corporation

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------

QUEST DIAGNOSTICS FINANCE INCORPORATED,
a Delaware corporation

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


LENDERS:

BANK OF AMERICA, N.A.,
individually in its capacity as a Lender and in
its capacity as Administrative Agent

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


UBS AG, STAMFORD BRANCH

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


MERRILL LYNCH CAPITAL CORPORATION

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


CREDIT SUISSE FIRST BOSTON

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


THE BANK OF NEW YORK

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


WACHOVIA BANK, N.A.

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


FLEET NATIONAL BANK

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


SUMITOMO MITSUI BANKING CORPORATION

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


ALLFIRST BANK

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


BANKERS TRUST COMPANY

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


THE MITSUBISHI TRUST
AND BANKING CORPORATION

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


PNC BANK, NATIONAL ASSOCIATION

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


FIFTH THIRD BANK

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------


E. SUN COMMERCIAL BANK, LTD.,
LOS ANGELES BRANCH

By: /s/
   --------------------------------------------------
Name:
     ------------------------------------------------
Title:
      -----------------------------------------------