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) July 13, 1999

PUBLIC SERVICE COMPANY OF COLORADO
(Exact Name of Registrant as Specified in Charter)

Colorado

(State or Other Jurisdiction
of Incorporation)

                                                           84-0296600
                                                        -------------------
                  1-3280                                  (IRS Employer
           ---------------------                        Identification No.)
           (Commission File No.)



1225 17th Street
Denver, CO.                                                 80202-5533
----------------------------------------                   ------------
(Address of Principal Executive Offices)                    (Zip Code)


Registrant's telephone number, including area code:        (303) 571-7511
                                                           ---------------


Item 5. OTHER EVENTS

On July 13, 1999, Public Service Company of Colorado (the "Company") entered into an underwriting agreement (the "Underwriting Agreement") with Merrill Lynch, Pierce, Fenner & Smith Incorporated, Lehman Brothers Inc. and Salomon Smith Barney Inc. (collectively, the "Purchasers"), relating to the sale by the Company to the Purchasers of $200,000,000 aggregate principal amount of Series A Senior Notes, 6 7/8 % due July 15, 2009 (the "Notes") issued under an Indenture dated as of July 1, 1999 between the Company and The Bank of New York, as trustee (the "Indenture") as supplemented by the First Supplemental Indenture dated as of July 15, 1999 between the Company and The Bank of New York, as trustee (the "First Supplemental Indenture"). The Notes have been registered under a registration statement (File No. 333-81791) on Form S-3 filed with the Securities and Exchange Commission pursuant to Rule 415 under the Securities Act of 1933, as amended. In connection with the execution of the Underwriting Agreement, the Indenture and the First Supplemental Indenture, the Company is filing exhibits as part of this Form 8-K. See "Item 7. Financial Statements and Exhibits."

Item 7. FINANCIAL STATEMENTS AND EXHIBITS

(c) Exhibits

Exhibit 1.1 Underwriting Agreement dated July 13, 1999 between the Company and the Purchasers.

Exhibit 4.1 Indenture dated July 1, 1999 between the Company and The Bank of New York, as Trustee.

Exhibit 4.2 First Supplemental Indenture dated July 15, 1999 between the Company and The Bank of New York, as Trustee.


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, thereunto duly authorized.

PUBLIC SERVICE COMPANY OF COLORADO

                                   /s/    Brian P. Jackson
                                 -----------------------------------------------
                                          Brian P. Jackson
                                          Executive Vice President,
                                          Finance and Administrative Services,
                                          Chief Financial Officer and Treasurer

Dated:  July 13, 1999


Exhibit 1.1


PUBLIC SERVICE COMPANY OF COLORADO

$200,000,000

SENIOR DEBT SECURITIES

UNDERWRITING AGREEMENT

Dated: July 13, 1999



PUBLIC SERVICE COMPANY OF COLORADO

$200,000,000

Senior Debt Securities

Underwriting Agreement

July 13, 1999

MERRILL LYNCH & CO.,
MERRILL LYNCH, PIERCE, FENNER & SMITH
INCORPORATED
LEHMAN BROTHERS INC.
SALOMON SMITH BARNEY INCORPORATED
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:

PUBLIC SERVICE COMPANY OF COLORADO, a Colorado corporation ("PSCo"), proposes, subject to the terms and conditions stated herein, to issue and sell to Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch"), Lehman Brothers Inc. and Salomon Smith Barney Inc. (collectively, the "Underwriters," which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof) $200,000,000 of its Series A Senior Notes 6 7/8% due 2009 (the "Securities"). The Securities will be issued as a single series under an Indenture, dated as of July 1, 1999 (the "Original Indenture") between PSCo and The Bank of New York, as trustee (the "Trustee"), as it will be supplemented by a supplemental indenture creating the Securities (said Original Indenture, as supplemented by a supplemental indenture being hereafter referred to as the "Indenture" and "Supplemental Indenture", respectively).


2

SECTION 1. REPRESENTATIONS AND WARRANTIES.

(a) REPRESENTATIONS AND WARRANTIES BY PSCO. PSCo represents and warrants to each Underwriter as of the date hereof, as of the Time of Delivery referred to in Section 2(c) hereof, and agrees with each Underwriter as follows:

(i) REGISTRATION STATEMENT FILING. A registration statement on Form S-3 (File No. 333-81791), in respect of the Securities has been filed by PSCo with the Securities and Exchange Commission (the "Commission") pursuant to Rule 415 under the Securities Act of 1933, as amended (the "Act"), and delivered to the Underwriters; such registration statement and any post-effective amendment thereto, each in the form heretofore delivered to the Underwriters, have been declared effective by the Commission in such form; and no stop order suspending the effectiveness of such registration statement has been issued and no proceeding for that purpose has been initiated or, to the knowledge of PSCo, threatened by the Commission (any preliminary prospectus included in such registration statement or thereafter filed with the Commission pursuant to Rule 424(a) of the rules and regulations of the Commission under the Act is referred to herein as a "Preliminary Prospectus". The various parts of such registration statement, including (i) all exhibits thereto, (ii) if applicable, the information contained in the form of prospectus filed with the Commission pursuant to Rule 424(b) under the Act in accordance with Section 5(a) hereof and deemed by virtue of Rule 430A under the Act to be a part of the registration statement at the time it was declared effective and (iii) the documents incorporated by reference in the prospectus contained in the registration statement at the time such part of such registration statement became effective, each as amended at the time such part of such registration statement became effective, are referred to herein collectively as the "Registration Statement". The final prospectus, as supplemented by the related prospectus supplement, in the form first filed with respect to the Securities pursuant to Rule 424(b) under the Act, is referred to herein collectively as the "Prospectus". Any reference herein to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Act, as of the date of such Preliminary Prospectus or Prospectus, as the case may be. Any reference to any amendment or supplement to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents filed after the date of such Preliminary Prospectus or Prospectus, as the case may be, under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and incorporated by reference in such Preliminary Prospectus or Prospectus, as the case may be; and any reference to any amendment to the Registration Statement shall be deemed to refer to and include PSCo's most recent annual report on Form 10-K (the "Form 10-K"), quarterly reports on Form 10-Q or current reports on Form 8-K, if any, filed pursuant to Section 13 or 15(d) of the Exchange Act after the effective date of the Registration Statement that is


3

incorporated by reference in the Registration Statement (the Form 10-K, the quarterly reports on Form 10-Q and any current reports on Form 8-K are referred to herein collectively as the "Exchange Act Filings")). For purposes of this Agreement, all references to the Preliminary Prospectus or Prospectus or to 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").

No order preventing or suspending the use of any Preliminary Prospectus has been issued by the Commission, and each Preliminary Prospectus, at the time of filing thereof, conformed in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder (the "1933 Act Regulations"), and did 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, in the light of the circumstances under which they were made, not misleading; PROVIDED, HOWEVER, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the PSCo by any Underwriter through Merrill Lynch expressly for use therein.

(ii) INCORPORATED DOCUMENTS. The documents incorporated or deemed to be incorporated by reference in the Registration Statement and the Prospectus and any amendment or supplement thereto, when they were or hereafter are filed with the Commission, complied and will comply in all material respects with the requirements of the Exchange Act and the rules and regulations of the Commission thereunder (the "1934 Act Regulations"), and none of such documents contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; and any further documents so filed and incorporated by reference in the Registration Statement and the Prospectus or any further amendment or supplement thereto, when such documents are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Exchange Act and the 1934 Act Regulations 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, in the light of the circumstances under which they were made, not misleading.

(iii) COMPLIANCE WITH REGISTRATION REQUIREMENTS. The Registration Statement complies, and the Prospectus and any further amendments or supplements to the Registration Statement or the Prospectus will comply, in all material respects with the requirements of the Act and the 1933 Act Regulations and do not and will not (i) as of the applicable effective date as to the Registration Statement and any amendment thereto and (ii) as of the applicable filing date and as of the date hereof and as of the


4

Time of Delivery (as defined below) as to the Prospectus and any amendment or supplement thereto, 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; PROVIDED, HOWEVER, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to PSCo by any Underwriter through Merrill Lynch expressly for use therein or to the part of the Registration Statement which shall constitute the Statement of Eligibility under the Trust Indenture Act of 1939, as amended (the "TIA"), of the Trustee under the Indenture.

(iv) FINANCIAL STATEMENTS. The financial statements included in the Registration Statement and the Prospectuses, together with the related schedules and notes, present fairly the financial position of PSCo and its consolidated subsidiaries at the dates indicated and the statement of operations, stockholders' equity and cash flows of PSCo and its consolidated subsidiaries for the periods specified; and, except as otherwise stated in the Registration Statement, such financial statements have been prepared in conformity with generally accepted accounting principles ("GAAP") applied on a consistent basis during 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.

(v) INDEPENDENT ACCOUNTANTS. Arthur Andersen LLP are independent public accountants with respect to PSCo as required by the Act and the 1933 Act Regulations.

(vi) 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, (A) there has been no material adverse change in the business, property or condition, financial or otherwise, of PSCo 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 PSCo or any of its subsidiaries, other than those in the ordinary course of business, which are material with respect to PSCo and its subsidiaries, considered as one enterprise and (C) neither PSCo nor any of its subsidiaries has any contingent obligations which are material to PSCo and its subsidiaries considered as one enterprise.

(vii) GOOD STANDING OF PSCO. PSCo has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Colorado, with due corporate authority to own and operate its properties and conduct its business as described in the Prospectus and to enter into and perform its obligations under this Agreement; and PSCo 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,


5

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.

(viii) GOOD STANDING OF SUBSIDIARIES. Each "significant subsidiary" (as such term is defined in Rule 1-02 of Regulation S-X promulgated under the Act) of PSCo (each a "Significant Subsidiary" and, collectively, the "Significant Subsidiaries") has been duly organized and is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has corporate 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 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 to so qualify or be in good standing would not have a Material Adverse Effect. Except as otherwise stated in the Registration Statement and the Prospectus, all of the issued and outstanding capital stock of each Significant Subsidiary has been duly authorized and is validly issued, fully paid and non-assessable and is owned by PSCo, directly or through its subsidiaries, free and clear of any security interest, mortgage, pledge, lien, encumbrance, claim or equity. None of the outstanding shares of capital stock of any Significant Subsidiary was issued in violation of preemptive or other similar rights of any securityholder of such Significant Subsidiary.

(ix) ABSENCE OF DEFAULTS AND CONFLICTS BY PSCO. Neither PSCo nor any of its 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 PSCo or any of its subsidiaries is a party or by which it or any of them may be bound, or to which any of the property or assets of PSCo or any subsidiary is subject, except for such defaults that would not result in a Material Adverse Effect. The issuance and sale of the Securities by PSCo, the compliance by PSCo with all of the provisions of this Agreement, the execution, delivery and performance by PSCo of this Agreement, the Original Indenture and the Supplemental Indenture and the consummation of the transactions herein and therein contemplated, will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any contracts, indenture, mortgage, deed of trust, loan or credit agreement or other agreement or instrument to which PSCo is a party or by which PSCo is bound or to which any of the property or assets of PSCo is subject, nor will such action result in any violation of the provisions of the charter or by-laws of PSCo or any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over PSCo or any of its properties.


6

(x) AUTHORIZATION AND DESCRIPTION OF THE SECURITIES. The Securities have been duly authorized by PSCo for issuance and sale pursuant to this Agreement and, when issued, authenticated and delivered by PSCo pursuant to this Agreement against payment of the consideration set forth herein, the Securities will be valid and binding obligations of PSCo, enforceable in accordance with their terms, except as enforcement thereof may be limited by laws or principles of equity affecting generally the enforcement of creditors' rights, including without limitation bankruptcy and insolvency laws and state laws which affect the enforcement of certain remedial provisions of the Indenture, and will be entitled to the benefits of the Indenture; the Securities conform in all material respects to the statements relating thereto contained in the Prospectus.

(xi) AUTHORIZATION OF UNDERWRITING AGREEMENT. This Agreement has been duly authorized, executed and delivered by PSCo.

(xii) AUTHORIZATION OF THE INDENTURE. Each of the Original Indenture and Supplemental Indenture have been duly authorized by PSCo and, at the Time of Delivery (as defined below), will have been duly executed and delivered by PSCo and, assuming due authorization, execution and delivery by the Trustee, will constitute a valid and binding agreement of PSCo enforceable in accordance with its terms except to the extent that enforcement thereof may be limited by bankruptcy, insolvency or reorganization laws relating to or affecting the enforcement of creditors' rights and by general equity principles, and will conform in all material respects to the statements relating thereto contained in the Prospectus; and at the effective date of the Registration Statement, the Indenture was or will have been duly qualified under the TIA.

(xiii) INVESTMENT COMPANY ACT. PSCo is not, and upon the issuance and sale of the Securities as herein contemplated and the application of the proceeds therefrom as described in the Prospectus will not be, an "investment company" or an entity "controlled" by an "investment company" as such terms are defined in the Investment Company Act of 1940, as amended (the "1940 Act").

(xiv) ABSENCE OF FURTHER REQUIREMENTS. PSCo has filed
with the Public Utilities Commission of the State of Colorado (the "Colorado Commission") an application with respect to the issuance and sale of PSCo's debt securities, including the Securities, and the Colorado Commission has issued its order authorizing and approving such issuance and sale. No further consent or authorization of or approval by the Colorado Commission or any other governmental or regulatory authority or body is necessary in connection with the issuance and sale by PSCo of the Securities pursuant to this Agreement, except that their must be compliance with the securities laws in the jurisdictions in which the Securities are to be offered and sold.


7

(xv) FRANCHISES. The franchises held by PSCo and its subsidiaries, together with the applicable Certificates of Convenience and Necessity issued by the Colorado Commission, give PSCo and such subsidiaries all necessary authority for the maintenance and operation of their respective properties and business as now conducted, and are free from burdensome restrictions or conditions of an unusual character.

(xvi) ABSENCE OF PROCEEDINGS. There is no action, suit, proceeding, inquiry or investigation before or brought by any court or governmental agency or body, domestic or foreign, now pending, or, to the knowledge of PSCo, threatened, against or affecting PSCo or any subsidiary, which is required to be disclosed in the Registration Statement or the Prospectus (other than as disclosed therein), or which 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 thereof or the consummation of the transactions contemplated in this Agreement or the performance by PSCo of its obligations hereunder.

(b) OFFICER'S CERTIFICATES. Any certificate signed by any officer of PSCo delivered to the Underwriters or to counsel for the Underwriters shall be deemed a representation and warranty by PSCo to each Underwriter as to the matters covered thereby.

SECTION 2. SALE AND DELIVERY TO UNDERWRITERS; CLOSING.

(a) SECURITIES. On the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, PSCo agrees to issue and sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase, the amount of Securities set forth opposite the name of such Underwriter in Schedule A hereto, plus any additional Securities which such Underwriter may become obligated to purchase pursuant to the provisions of
Section 10 hereof, at a purchase price equal to 98.575% of the principal amount thereof. PSCo shall not be obligated to deliver any of the Securities except upon payment for all of the Securities to be purchased as provided herein.

(b) OFFERING OF SECURITIES. Upon the authorization by Merrill Lynch of the release of the Securities, the several Underwriters propose to offer the Securities for sale upon the terms and conditions set forth in the Prospectus.

(c) CLOSING. The Securities to be purchased by each Underwriter hereunder will be represented by a global certificate or certificates in book-entry form which will be deposited by or on behalf of PSCo with The Depository Trust Company ("DTC") or its designated custodian and registered in the name of Cede & Co., as nominee of DTC. PSCo will deliver the Securities to Merrill Lynch, for the account of each Underwriter, against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of immediately available funds to PSCo, by causing DTC to credit the Securities to the account of


8

Merrill Lynch at DTC. The time, date and location of such delivery and payment (the "Time of Delivery") shall be 10:00
a.m., New York time, on July 16, 1999, at LeBoeuf, Lamb, Greene & MacRae, L.L.P., 125 West 55th Street, New York, New York 10019, or at such other time, date and location as Merrill Lynch and PSCo may agree upon in writing.

SECTION 3. COVENANTS PSCo agrees with each of the Underwriters:

(a) COMPLIANCE WITH SECURITIES REGULATIONS AND COMMISSION REQUESTS. To prepare the Prospectus in a form approved by the Underwriters and to file such Prospectus pursuant to Rule 424(b) under the Act within the time prescribed under Rule 424(b) or Rule 430A(a)(3), as the case may be, under the Act; to make no further amendment or supplement to the Registration Statement or the Prospectus prior to the Time of Delivery to which the Underwriters reasonably object promptly after reasonable notice thereof; to advise the Underwriters, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any supplement to the Prospectus or any amended Prospectus has been filed and to furnish the Underwriters with copies thereof; prior to the termination of the offering of the Securities, to file promptly all reports and any definitive proxy or information statements required to be filed with the Commission pursuant to
Section 13(a), 13(c), 14 or 15(d) of the Exchange Act; to advise the Underwriters, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or Prospectus, of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statement or Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any prospectus relating to the Securities or suspending any such qualification, to use promptly its best efforts to obtain its withdrawal.

(b) BLUE SKY QUALIFICATION. To use its best efforts, in cooperation with the Underwriters, to qualify the Securities for offering and sale under the securities laws of such jurisdictions of the United States as the Underwriters may designate and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Securities, provided that in connection therewith PSCo shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction.

(c) DELIVERY OF PROSPECTUSES. To furnish the Underwriters with copies of the Prospectus in such quantities as the Underwriters may reasonably request, and, if the delivery of a prospectus is required in connection with the offer or sale of the Securities and if at such time any event shall have occurred as a result of which the Pro-


9

spectus as then amended or supplemented would contain an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus is delivered, not misleading, or, if for any other reason it shall be necessary during such period to amend or supplement the Prospectus or to file under the Exchange Act any document incorporated by reference in the Prospectus in order to comply with the Act or the Exchange Act, to notify the Underwriters and upon the request of the Underwriters to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many copies as the Underwriters may reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance.

(d) RULE 158. To file timely such reports pursuant to the Exchange Act as are necessary in order to make generally available to its security holders as soon as practicable, an earnings statement of PSCo for the purposes of, and to provide the benefits contemplated by, the last paragraph of Section 11(a) of the Act.

(e) RESTRICTION ON SALE OF SECURITIES. Between the date hereof and the date on which the distribution of the Securities is complete, PSCo will not, without the prior written consent of Merrill Lynch, offer or sell or enter into any agreement to sell, any of its other debt securities which are substantially similar to the Securities, including any guarantee of such securities, or any securities convertible into or exchangeable for or representing the right to receive any of the foregoing securities.

(f) REPORTING REQUIREMENTS. PSCo, 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.

(g) DELIVERY OF REGISTRATION STATEMENTS. To the extent not previously so furnished, to furnish to Merrill Lynch two copies of the signed Registration Statement, as initially filed with the Commission, of all amendments thereto, and of all documents incorporated by reference therein (including all exhibits filed therewith, other than exhibits which have previously been furnished to Merrill Lynch), two copies of each manually signed consent and certificate of independent accountants and of each other person who by his or her profession gives authority to statements made by him or her and who is named in the Registration Statement as having prepared, certified or reviewed any part thereof, and to furnish to Merrill Lynch sufficient unsigned copies of the foregoing (other than exhibits, including consents filed as exhibits, to the Registration Statement) as Merrill Lynch may reasonably request for distribution.


10

(h) USE OF PROCEEDS. To apply the net proceeds from the sale of the Securities in the manner set forth in the Prospectus.

SECTION 4. PAYMENT OF EXPENSES.

(a) EXPENSES. PSCo covenants and agrees with the several Underwriters that it will pay the following: (i) the fees, disbursements and expenses of PSCo's counsel and accountants in connection with the registration of the Securities under the Act and all other expenses in connection with the preparation, printing and filing of the Registration Statement, any Preliminary Prospectus and the Prospectus and any amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and dealers; (ii) the cost of printing or producing any Agreement Among Underwriters, this Agreement, the Blue Sky Survey and any supplement thereto and any other documents in connection with the offering, purchase, sale, issuance and delivery of the Securities; (iii) all expenses in connection with the qualification of the Securities for offering and sale under state securities laws as provided in Section 3(b) hereof, including the fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky Survey and any supplement thereto;
(iv) any fees charged by Standard & Poor's Ratings Services, Moody's Investors Service, Inc. or Duff & Phelps Credit Rating Co. (each, a "Rating Agency") for rating the Securities; (v) the costs of any depository arrangements for the Securities with DTC or any successor depository; (vi) all fees and reasonable expenses of the Trustee and any agent thereof and the fees and disbursements of their counsel; (vii) the printing of the Securities in certificated form, if required; and (viii) all other costs and expenses incident to the performance of obligations hereunder which are not otherwise specifically provided for in this Section. It is understood, however, that, except as provided in this Section, Section 8 and Section 12 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of their counsel, transfer taxes on resale of any of the Securities by them, and any advertising expenses connected with any offers they may make.

(b) TERMINATION OF AGREEMENT. If this Agreement is terminated by the Underwriters in accordance with the provisions of Section 5 or Section 9(a)(i) hereof, PSCo 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 Underwriters hereunder are subject to the accuracy of the representations and warranties of PSCo contained in Section 1 hereof or in certificates of any officer of PSCo delivered pursuant to the provisions hereof, to the performance by PSCo of its covenants and other obligations hereunder, and to the following additional conditions:

(a) EFFECTIVENESS OF REGISTRATION STATEMENT. The Prospectus shall have been filed with the Commission pursuant to Rule 424(b) and Rule 430A(a)(3), if appli-


11

cable, within the applicable time period prescribed for such filing by the rules and regulations under the Act and in accordance with Section 5(a) hereof; and no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened by the Commission.

(b) ORDER OF COLORADO COMMISSION. At the Time of Delivery, the order of the Colorado Commission authorizing and approving the issuance and sale of the Securities shall be final and in full force and effect and the time for appeal therefrom or review thereof or intervention with respect thereto shall have expired.

(c) OPINION OF COUNSEL FOR UNDERWRITERS. Cahill Gordon & Reindel, counsel for the Underwriters, shall have furnished to the Underwriters their written opinion, dated the Time of Delivery, with respect to the matters referred to in clauses (ii), (iii), (iv), (v), (viii) and (xiii) of
Section 5(d) hereof and such related matters as the Underwriters may request (it being understood that such counsel may rely as to all matters of Colorado law and legal conclusions based upon the opinion of counsel for PSCo referred to in Section 5(d) hereof); and such counsel shall have received such papers and information as they may reasonably request to enable them to pass upon such matters.

(d) OPINION OF COUNSEL FOR COMPANY. LeBoeuf, Lamb, Greene & MacRae, L.L.P., counsel for PSCo, shall have furnished to the Underwriters their written opinion, dated the Time of Delivery, in form and substance satisfactory to the Underwriters, to the effect that:

(i) PSCo has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Colorado, with corporate power and authority to own its properties and conduct its business as described in the Prospectus. To the best of their knowledge, PSCo is duly qualified as a foreign corporation to transact business and is in good standing in each jurisdiction in which such qualification is required, except where the failure to so qualify or be in good standing would not have a material adverse effect on the business, properties or operations of PSCo and its subsidiaries considered as one enterprise;

(ii) The Indenture has been duly and validly authorized, executed and delivered by PSCo and is in due and proper form and (assuming the Indenture has been duly authorized, executed and delivered by the Trustee) constitutes a legal, valid and binding agreement of PSCo, enforceable in accordance with its terms, except as enforcement thereof may be limited by laws and principles of equity affecting generally the enforcement of creditors' rights, including without limitation bankruptcy and insolvency laws and state laws which affect


12

the enforcement of certain remedial provisions of the Indenture; PROVIDED, HOWEVER, that such state laws will not, in our opinion, render the remedies afforded by the Indenture inadequate for the practical realization of the benefit provided thereby.

(iii) The Indenture has been duly qualified under the TIA;

(iv) The Securities are in due and proper form and the issuance and sale of the Securities have been duly authorized by all necessary corporate action, and when duly executed, authenticated and delivered to the Underwriters pursuant to this Agreement against payment of the consideration set forth therein, the Securities will be legal, valid and binding obligations of PSCo enforceable (subject to the exceptions and limitations referred to in paragraph (ii) hereof) in accordance with their terms.

(v) This Agreement has been duly authorized, executed and delivered by PSCo;

(vi) The issuance and sale of the Securities have been duly authorized and approved by an order of the Colorado Commission and such order is final and in full force and effect on the date hereof, the time for appeal therefrom or review thereof or intervention with respect thereto having expired; no further approval, authorization, consent or other order of any public board or body, including under the Public Utility Holding Company Act of 1935, as amended, is legally required (other than in connection or compliance with the provisions of the securities laws of any jurisdiction) for the issuance and sale by PSCo of the Securities pursuant to this Agreement.

(vii) The facsimile signature of the President, an Executive Vice President, a Senior Vice President or a Vice President of PSCo in lieu of his or her manual signature on the Securities and the facsimile signature of the Secretary or an Assistant Secretary of PSCo attesting the corporate seal in lieu of his or her manual signature on the Securities have been duly and properly authorized by the Board of Directors of PSCo, are not inconsistent with the provisions of the Restated Articles of Incorporation, as amended, or By-laws of PSCo and are valid and effective under the laws of the State of Colorado; and the facsimile signatures of such officers on the Securities have the same legal effect as though they had manually signed and attested the Securities as such respective officers.


13

(viii) The Securities and the Indenture conform as to legal matters to the description of the terms thereof contained in the Registration Statement and the Prospectus, as amended or supplemented to the date hereof.

(ix) The issuance and sale of the Securities by PSCo, the compliance by PSCo with all of the provisions of this Agreement, and the consummation of the transactions contemplated herein, will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any agreement or instrument known to such counsel to which PSCo is a party or by which PSCo is bound or to which any of the property or assets of PSCo is subject, nor will such action result in any violation of the provisions of the charter or by-laws of PSCo or any statute or any order, rule or regulation known to such counsel of any court or government agency or body having jurisdiction over PSCo or any of its properties;

(x) The statements in PSCo's Annual Report on Form 10-K for the fiscal year ended December 31, 1998, incorporated by reference into the Prospectus, under the heading "Character of Ownership" in Item
2. Properties, and insofar as they are, or refer to, statements of law or legal conclusions, have been prepared or reviewed by their counsel and are correct in all material respects and fairly present the information purported to be given;

(xi) To the best of their knowledge, neither PSCo nor any subsidiary is in violation of its charter or by-laws and no default by PSCo or any subsidiary exists in the due performance or observance of any material contract, indenture, mortgage, loan agreement, note, lease or other agreement or instrument;

(xii) The documents incorporated by reference in the Prospectus or any further amendment or supplement thereto made by PSCo prior to the Time of Delivery (other than the financial statements and related schedules therein, as to which such counsel need express no opinion), when they were filed with the Commission, complied as to form in all material respects with the requirements of the Exchange Act and the 1934 Act Regulations;

(xiii) The Registration Statement is effective under the Act and, to the best of their knowledge, no proceedings for a stop order have been instituted or are pending or threatened under
Section 8(d) of the Act. The Registration Statement and the Prospectus and any further amendments and supplements thereto made by PSCo prior to the Time of Delivery (other than the financial statements (including the notes thereto) and related schedules and other financial or statistical data contained or incorporated by reference therein, as to which such counsel need express no opinion) comply as to form in all material


14

respects with the requirements of the Act and the
TIA and the rules and regulations thereunder; and

(xiv) PSCo is not, and upon the issuance and sale of the Securities as contemplated by this Agreement and the application of the proceeds therefrom as described in the Prospectus will not be, an "investment company" or an entity "controlled" by an "investment company" required to be registered under the Investment Company Act of 1940, as amended.

Such counsel shall state that it does not know of any legal or governmental proceeding (pending or threatened) required to be described in the Registration Statement or Prospectus, as amended or supplemented to the date hereof, which is not described as required, nor of any contract or document of a character required to be described in the Registration Statement or the Prospectus, as amended or supplemented to the date hereof, or to be filed as an exhibit to the Registration Statement which is not described or filed as required.

Such counsel shall also state that in connection with their opinion, they have participated in discussions with officers and representatives of PSCo, in certain of which representatives of the Underwriters and their counsel also participated and at which the affairs of PSCo and the contents of the Registration Statement and the Prospectus were discussed. There is no assurance that all possible material facts as to PSCo were disclosed to such counsel or that such counsel's familiarity with PSCo or the operations in which it is engaged is such that such counsel have necessarily recognized the materiality of such facts as were disclosed. To the extent such counsel have deemed appropriate, such counsel have relied upon statements of officers and representatives of PSCo as to the materiality of those facts disclosed to such counsel. Such counsel are not passing upon and do not assume any responsibility for the accuracy, completeness or fairness of the statements contained in the Registration Statement and the Prospectus except to the limited extent referred to in paragraphs
(viii) and (ix) above. Subject to the foregoing, and to the other limitations and qualifications expressed in this letter, such counsel may state that nothing has come to its attention that would lead such counsel to believe that the Registration Statement, when it became effective or on the date of this Agreement, contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading, or that, at the date the Prospectus Supplement was filed with the Securities and Exchange Commission, the Prospectus included, or, at the date hereof, the Prospectus, as it may have been amended or supplemented, includes an untrue statement of a material fact or omitted, or omits, 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; provided that such counsel need not ex-


15

press any belief as to the financial statements (including the notes thereto) and related schedules or other financial or statistical data contained or incorporated by reference in the Registration Statement or the Prospectus, or any amendment or supplement thereto, as to any information contained therein furnished to PSCo in writing by any Underwriter through Merrill Lynch expressly for use therein or as to the Statement of Eligibility (Form T-1).

(e) OFFICERS' CERTIFICATE. At the Time of Delivery, there shall not have been, since the date hereof or since the respective dates as of which information is given in the Prospectus, any material adverse change in the business, property or condition, financial or otherwise, of PSCo and its subsidiaries, considered as one enterprise, whether or not arising in the ordinary course of business, and the Underwriters shall have received a certificate of the President, an Executive Vice President, a Senior Vice President or a Vice President of PSCo and of the chief financial officer, chief accounting officer, the Treasurer or an Assistant Treasurer of PSCo, dated as of the Time of Delivery, to the effect that (i) there has been no such material adverse change, (ii) the representations and warranties in Section 1(a) hereof are true and correct with the same force and effect as though expressly made at and as of the Time of Delivery, (iii) PSCo has complied with all agreements and satisfied all conditions on its part to be performed or satisfied at or prior to the Time of Delivery, and (iv) 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 LETTER. On the date of this Agreement, Arthur Andersen LLP shall have furnished to the Underwriters a letter, dated the date of this Agreement, in form and substance satisfactory to the Underwriters, to the effect that:

(i) they are independent public accountants with respect to PSCo and its subsidiaries within the meaning of the Act and the applicable published rules and regulations thereunder (the "Act Regulations");

(ii) in their opinion, the audited consolidated financial statements and financial statement schedule(s) incorporated by reference in the Registration Statement and the Prospectus and included in the Form 10-K comply as to form in all material respects with the applicable accounting requirements of the Act, the Act Regulations, the Exchange Act and the applicable published rules and regulations thereunder (the "Exchange Act Regulations");

(iii) on the basis of (1) the performance of the procedures specified by the American Institute of Certified Public Accountants for a review of interim financial information as described in Statement on Auditing Standards


16

No. 71, Interim Financial Information, on the unaudited consolidated balance sheets, the unaudited consolidated statements of income and retained earnings, and the unaudited consolidated statements of cash flows, of PSCo and its subsidiaries included in PSCo's quarterly reports on Form 10-Q filed with the Commission under
Section 13 of the Exchange Act (the "Form 10-Q's") subsequent to the Form 10-K, (2) a reading of the latest available unaudited financial statements of PSCo, (3) a reading of the minutes of the Annual Meeting of Shareholders and the latest minutes of Meetings of the Board of Directors of PSCo as set forth in the minute books for the current year and certain draft resolutions for subsequent meetings and (4) inquiries of the officers of PSCo who have responsibility for financial and accounting matters (it being understood that the foregoing procedures do not constitute an audit made in accordance with generally accepted auditing standards and would not necessarily reveal matters of significance with respect to the comments made in such letter, and accordingly that Arthur Andersen LLP makes no representation as to the sufficiency of such procedures for the purposes of the several Underwriters), nothing has come to their attention which caused them to believe that (A) any material modifications should be made to the unaudited consolidated financial statements included in the Form 10-Q's for them to be in conformity with generally accepted accounting principles; (B) the unaudited consolidated financial statements included in the Form 10-Q's do not comply as to form in all material respects with the applicable accounting requirements of the Exchange Act as they apply to Form 10-Q and Exchange Act Regulations or (C) at the date of the latest available consolidated financial statements and at a specified date not more than three business days prior to the date of such letter, there was any change in the consolidated capital stock or increase in the consolidated long-term debt of PSCo or any decrease in the consolidated net assets or shareholders' equity of PSCo, in each case as compared with the amounts shown on the most recent consolidated balance sheet of PSCo incorporated by reference in the Registration Statement and the Prospectus or, during the period from the date of such balance sheet to a specified date not more than three business days prior to the date of such letter, upon inquiries of the appropriate officers of PSCo, there were any decreases, as compared with the corresponding period in the preceding year, in consolidated operating revenues or consolidated net income of PSCo, except in each such case as set forth in or contemplated by the Registration Statement and the Prospectus or except for such exceptions enumerated in such letter as shall have been agreed to by the Underwriters and PSCo; and

(iv) In addition to the audits referred to in their report appearing in the Form 10-K incorporated by reference in the Registration Statement and the


17

Prospectus, and the limited procedures referred to in clause (iii) above, they have carried out certain other specified procedures, not constituting an audit, with respect to certain amounts, percentages and financial information which are included or incorporated by reference in the Registration Statement and the Prospectus and which are specified by the Underwriters, and have found such amounts, percentages and financial information to be in agreement with the relevant accounting, financial and other records of PSCo and its subsidiaries identified in such letter, provided that said letter may vary from the requirements specified above in such manner as the Underwriters may deem not to be material or as may be acceptable to the Underwriters who have agreed to purchase in the aggregate 50% or more of the Securities.

(g) BRING-DOWN COMFORT LETTER. At the Time of Delivery, the Underwriters shall have received from Arthur Andersen LLP a letter, dated as of the Time of Delivery, to the effect that they reaffirm the statements made in the letter furnished pursuant to subsection (g) of this Section, except that the specified date referred to shall be a date not more than three business days prior to the Time of Delivery.

(h) MAINTENANCE OF RATING. Since the date of this Agreement, there shall not have occurred a downgrading in the rating assigned to the Securities or any of PSCo's other securities by S&P or Moody's, and neither S&P nor Moody's shall have publicly announced that it has under surveillance or review its rating of the Securities or any of PSCo's other securities.

(i) EXECUTION OF AGREEMENTS. The Indenture shall have been executed and delivered, in each case in a form reasonably satisfactory to the Underwriters.

(j) ADDITIONAL DOCUMENTS. At the Time of Delivery, counsel for the Underwriters shall have been furnished with such documents and opinions as they may require for the purpose of enabling them to pass upon the issuance and sale of the Securities 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 PSCo in connection with the issuance and sale of the Securities as herein contemplated shall be satisfactory in form and substance to the Underwriters and counsel for the Underwriters.

(k) 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 Underwriters by notice to PSCo at any time at or prior to the Time of Delivery, 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.


18

SECTION 6. INDEMNIFICATION AND CONTRIBUTION.

(a) INDEMNIFICATION OF UNDERWRITERS. PSCo agrees to indemnify and hold harmless each Underwriter and each person, if any, who controls any Underwriter within the meaning of Section 15 of the Act or Section 20 of the 1934 Act, 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), 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 contained 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 alleged untrue statement or omission, if such settlement is effected with the written consent of PSCo; and

(iii) against any and all expense whatsoever, as incurred (including the fees and disbursements of counsel chosen by Merrill Lynch), 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 PSCo by any Underwriter through Merrill Lynch expressly for use in the Registration Statement (or any amendment thereto) or the Prospectus (or any amendment or supplement thereto).

PSCo shall not be liable for indemnity under this
Section 6(a) with respect to any Preliminary Prospectus to the extent that any such loss, claim, damage or liability of such Underwriter results solely from the fact that such Underwriter sold Securities to a person to


19

whom it is established that there was not sent or given, at or prior to the written confirmation of such sale, a copy of the Prospectus (excluding documents incorporated by reference) in any case where such delivery is required by the Act, if PSCo has previously furnished to the Underwriters the copies thereof in compliance with this Agreement, and the loss, claim, damage or liability of such Underwriter results from an untrue statement or omission of a material fact contained in the Preliminary Prospectus that was corrected in the Prospectus.

(b) INDEMNIFICATION OF COMPANY, DIRECTORS AND OFFICERS. Each Underwriter severally agrees that it will indemnify and hold harmless PSCo, its directors, and each of its officers who signed the Registration Statement and each person, if any, who controls them within the meaning of Section 15 of the Act or Section 20 of the 1934 Act to the same extent as the indemnity agreement set forth in
Section 6(a) hereof, but only with respect to statements or omissions made in the Registration Statement, any Preliminary Prospectus or the Prospectus, or any amendment or supplement thereto, in reliance upon and in conformity with written information furnished to PSCo by such Underwriter through Merrill Lynch expressly for use in the Registration Statement, such Preliminary Prospectus, or the Prospectus, or any amendment or supplement thereto.

(c) ACTION 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 the indemnified parties shall be selected by Merrill Lynch, and, in the case of parties indemnified pursuant to Section 6(b) above, counsel to the indemnified parties shall be selected by PSCo, in each case reasonably acceptable to the indemnifying party. An indemnifying 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 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,

pro-


20

ceeding 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 45 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 30 days prior to such settlement being entered into and (iii) such indemnifying party shall not have reimbursed such indemnified party in accordance with such request prior to the date of such settlement.

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 PSCo on the one hand and the Underwriters on the other hand from the offering of the Securities 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 PSCo on the one hand and of the Underwriters on the 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 PSCo on the one hand and the Underwriters on the other hand in connection with the offering of the Securities 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 pursuant to this Agreement (before deducting expenses) received by PSCo and the total underwriting discount received by the Underwriters, in each case as set forth on the cover of the Prospectus, bear to the aggregate initial public offering price of the Securities as set forth on such cover.

The relative fault of PSCo 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 PSCo or by the Underwriters and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.


21

PSCo 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 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 any 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, 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 each director of PSCo, each officer of PSCo who signed the Registration Statement, and each person, if any, who controls PSCo 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 PSCo. The Underwriters' respective obligations to contribute pursuant to this
Section 7 are several in proportion to the number of Securities 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 PSCo 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 PSCo, and shall survive delivery of the Securities to the Underwriters.

SECTION 9. TERMINATION OF AGREEMENT.

(a) TERMINATION; GENERAL. The Underwriters may terminate this Agreement, by notice to PSCo, at any time at or prior to the Time of Delivery, (i) if there has been, since the time of execution of this Agreement or since the respective dates as of which information is


22

given in the Prospectus, any material adverse change in the business, property or condition, financial or otherwise, of PSCo and its subsidiaries, considered as one enterprise, whether or not arising in the ordinary course of business, or (ii) if there has occurred any material adverse change in the financial markets in the United States, 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 Underwriters, impracticable to market the Securities or to enforce contracts for the sale of the Securities, or (iii) if trading in any securities of PSCo has been suspended or materially limited by the Commission or the New York Stock Exchange, or if trading generally on the New York Stock Exchange has been suspended or materially limited, or minimum or maximum prices for trading have been fixed, or maximum ranges for prices have been required, by such exchange or by order of the Commission, or any other governmental authority, or (iv) 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 any Underwriter or Underwriters shall fail or refuse at the Time of Delivery (otherwise than for some reason sufficient to justify, in accordance with the provisions hereof, the cancellation or termination of its or their obligations hereunder) to purchase and pay for the Securities which it or they have agreed to purchase as provided in paragraph 2 hereof (the "Defaulted Securities"), and:

(a) if the aggregate principal amount of the Defaulted Securities does not exceed 10% of the aggregate principal amount of the Securities, the remaining Underwriters (the "Non-Defaulting Underwriters") shall have the right, within a period of 24 hours thereafter, to make arrangements for one or more of the Non-Defaulting Underwriters, or any other purchasers acceptable to PSCo, to purchase all, but not less than all, of the Defaulted Securities in such principal amounts as may be agreed upon and upon the terms herein set forth; if, however, during such 24 hour period the Non-Defaulting Underwriters shall not have completed such arrangements for the purchase of all the Defaulted Securities, then the Non-Defaulting Underwriters shall be obligated to purchase and pay for the Defaulted Securities in proportion to their respective original purchase commitments hereunder (based upon the ratio that each of their respective original purchase commitments bears to the aggregate original purchase commitment of the Non-Defaulting Underwriters); or


23

(b) if the aggregate principal amount of the Defaulted Securities exceeds 10% of the aggregate principal amount of the Securities, the Non-Defaulting Underwriters shall have the right, within a period of 24 hours thereafter, to make arrangements for one or more of the Non-Defaulting Underwriters, or any other purchasers acceptable to PSCo, to purchase the Defaulted Securities in such principal amounts as may be agreed upon and upon the terms herein set forth; if, however, during such 24 hour period the Non-Defaulting Underwriters shall not have completed such arrangements for the purchase of all the Defaulted Securities, then PSCo may, within a further period of 24 hours, make arrangements with one or more other members of the National Association of Securities Dealers, Inc., satisfactory to the Non-Defaulting Underwriters, to purchase and pay for, upon the terms herein set forth, Defaulted Securities for the purchase of which no arrangements shall have been made by the Non-Defaulting Underwriters. In the event that neither the Non-Defaulting Underwriters nor PSCo has arranged for the purchase of the Defaulted Securities as above provided, then this Agreement shall terminate.

No action taken by PSCo or the Non-Defaulting Underwriters under this Section 9 shall relieve any defaulting Underwriter of liability in respect of its default hereunder.

In the event that the sale and delivery of all or any principal amount of the Securities shall be effected as provided in clause (a) or (b) above, (a) either PSCo or the Underwriters shall have the right to postpone the Time of Delivery until the fifth business day after the Time of Delivery originally specified in Section 2 hereof or such other time as PSCo and the Underwriters (or the representative of the Non-Defaulting Underwriters and the substituted purchasers, if any) shall agree,
(b) PSCo shall promptly prepare and file with the Commission any amendments or supplements to the Prospectus which may thereby be made necessary and (c) the respective principal amounts of Securities to be purchased by the Non-Defaulting Underwriters or substituted purchasers shall be taken as the basis of their respective purchase commitments hereunder.

SECTION 11. 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 the Underwriters c/o Merrill Lynch, Pierce, Fenner & Smith Incorporated at North Tower, World Financial Center, New York, New York 10281-1201, attention of: Robert Craig (telecopy number:
212-449-8636); and notices to PSCo shall be directed to it at 1225 17th Street, Suite 900, Denver, Colorado 80507-5533, Attention:
Brian P. Jackson (telecopy number: 303-294-2976).

SECTION 12. PARTIES. This Agreement shall each inure to the benefit of and be binding upon the Underwriters and PSCo and their respective successors. Nothing expressed or mentioned in this Agreement is intended or shall be construed to give any person,


24

firm or corporation, other than the Underwriters and PSCo 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 and PSCo 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 from any Underwriter shall be deemed to be a successor by reason merely of such purchase.

SECTION 13. 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 REFER TO NEW YORK CITY TIME.

SECTION 14. EFFECT OF HEADINGS. The Article and Section headings herein are for convenience only and shall not affect the construction hereof.


25

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

Very truly yours,

PUBLIC SERVICE COMPANY OF COLORADO

By:   /s/  Richard C. Kelly
      ---------------------------
      Richard C. Kelly
      Executive Vice President

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

MERRILL LYNCH & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH

INCORPORATED

LEHMAN BROTHERS INC.
SALOMON SMITH BARNEY INC.

By: MERRILL LYNCH, PIERCE, FENNER & SMITH

INCORPORATED

By /s/  Robert Craig
   ------------------------------
   Authorized Signatory

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


                                   Schedule A
                                   ----------

                                                      Principal Amount of
                  Name of Underwriter              Securities to be Purchased
                  -------------------              --------------------------


Merrill Lynch, Pierce, Fenner
  & Smith Incorporated..................                            $120,000,000
Lehman Brothers Inc.....................                              40,000,000

Salomon Smith Barney Inc................                              40,000,000
                                                                    ------------

      Total.............................                            $200,000,000
                                                                    ------------
                                                                    ------------


Exhibit 4.1


PUBLIC SERVICE COMPANY OF COLORADO,

AS ISSUER

TO

THE BANK OF NEW YORK,

AS TRUSTEE


INDENTURE

SENIOR DEBT SECURITIES

DATED AS OF JULY 1, 1999




PUBLIC SERVICE COMPANY OF COLORADO

Reconciliation and tie between Trust Indenture Act of 1939 and Indenture, dated as of July 1, 1999

Trust Indenture                                                                    Indenture Section
  Act Section

ss.310(a)(1)....................................................................        609
      (a)(2)....................................................................        609
      (a)(3)....................................................................        Not Applicable
      (a)(4)....................................................................        Not Applicable
      (a)(5)....................................................................        609
      (b).......................................................................        608, 610
ss.311(a).......................................................................        613
      (b).......................................................................        613
ss.312(a).......................................................................        701, 702(a)
      (b).......................................................................        702(b)
      (c).......................................................................        702(c)
ss.313(a).......................................................................        703(a)
      (b).......................................................................        Not Applicable
      (c).......................................................................        703(a)
      (d).......................................................................        703(b)
ss.314(a).......................................................................        704
      (b).......................................................................        Not Applicable
      (c)(1)....................................................................        102
      (c)(2)....................................................................        102
      (c)(3)....................................................................        Not Applicable
      (d).......................................................................        Not Applicable
      (e).......................................................................        102
ss.315(a).......................................................................        601(a)
      (b).......................................................................        602
      (c).......................................................................        601(b)
      (d).......................................................................        601(c)
      (d)(1)....................................................................        601(a), 601(c)
      (d)(2)....................................................................        601(c)
      (d)(3)....................................................................        601(c)
      (e)      .................................................................        514
ss.316(a)(last sentence) .......................................................        101
      (a)(1)(A).................................................................        512
      (a)(1)(B).................................................................        502, 513
      (a)(2)....................................................................        Not Applicable
      (b).......................................................................        508
ss.317(a)(1)....................................................................        503
      (a)(2)....................................................................        504
      (b).......................................................................        1008
ss.318(a).......................................................................        107


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


TABLE OF CONTENTS

                                                                                                      Page
                                                                                                      ----
RECITALS OF THE COMPANY..................................................................................1

                          ARTICLE ONE

               Definitions and other Provisions
                    of General Application

SECTION 101.  Definitions................................................................................1
         ACT      .......................................................................................2
         AFFILIATE.......................................................................................2
         AUTHENTICATING AGENT............................................................................2
         BANKRUPTCY LAW..................................................................................2
         BOARD OF DIRECTORS..............................................................................2
         BOARD RESOLUTION................................................................................2
         BUSINESS DAY....................................................................................2
         COMMISSION......................................................................................3
         COMPANY  .......................................................................................3
         COMPANY REQUEST or COMPANY ORDER................................................................3
         CORPORATE TRUST OFFICE..........................................................................3
         COVENANT DEFEASANCE.............................................................................3
         CUSTODIAN.......................................................................................3
         DEFAULT  .......................................................................................3
         DEFAULTED INTEREST..............................................................................3
         DEFEASANCE......................................................................................3
         DEPOSITORY......................................................................................3
         DOLLARS and $...................................................................................4
         EVENT OF DEFAULT................................................................................4
         EXCHANGE ACT....................................................................................4
         GAAP     .......................................................................................4
         GLOBAL SECURITY.................................................................................4
         HOLDER or SECURITYHOLDER........................................................................4
         INDENTURE.......................................................................................4
         INTEREST .......................................................................................4
         INTEREST PAYMENT DATE...........................................................................4
         MATURITY .......................................................................................4
         OFFICER  .......................................................................................4
         OFFICER'S CERTIFICATE...........................................................................5
         OPINION OF COUNSEL..............................................................................5
         ORIGINAL ISSUE DISCOUNT SECURITY................................................................5
         OUTSTANDING.....................................................................................5
         PAYING AGENT....................................................................................6
         PERIODIC OFFERING...............................................................................6
         PERSON   .......................................................................................6
         PLACE OF PAYMENT................................................................................6
         PREDECESSOR SECURITY............................................................................6
         REDEMPTION DATE.................................................................................6
         REDEMPTION PRICE................................................................................7
         REGISTERED SECURITY.............................................................................7
         REGULAR RECORD DATE.............................................................................7
         RESPONSIBLE OFFICER.............................................................................7

-i-

                                                                                                      Page
                                                                                                      ----
         SECURITIES......................................................................................7
         SECURITY REGISTER and SECURITY REGISTRAR........................................................7
         SPECIAL RECORD DATE.............................................................................7
         STATED MATURITY.................................................................................7
         TRANCHE  .......................................................................................7
         TRUST INDENTURE ACT.............................................................................7
         TRUSTEE  .......................................................................................8
         U.S. GOVERNMENT OBLIGATIONS.....................................................................8
         VICE PRESIDENT..................................................................................8
SECTION 102.      Compliance Certificates and Opinions...................................................8
SECTION 103.      Form of Documents Delivered to Trustee.................................................9
SECTION 104.      Acts of Holders.......................................................................10
SECTION 105.      Notices, Etc., to Trustee and Company.................................................11
SECTION 106.      Notice to Holders; Waiver.............................................................11
SECTION 107.      Conflict with Trust Indenture Act.....................................................12
SECTION 108.      Effect of Headings and Table of
                  Contents..............................................................................12
SECTION 109.      Successors and Assigns................................................................12
SECTION 110.      Separability Clause...................................................................13
SECTION 111.      Benefits of Indenture.................................................................13
SECTION 112.      Governing Law.........................................................................13
SECTION 113.      Legal Holidays........................................................................13
SECTION 114.      No Recourse Against Others............................................................13

                          ARTICLE TWO

                        Security Forms

SECTION 201.      Forms Generally.......................................................................14
SECTION 202.      Form of Trustee's Certificate of
                  Authentication........................................................................14

                         ARTICLE THREE

                        The Securities

SECTION 301.      Amount Unlimited; Issuable in Series..................................................15
SECTION 302.      Denominations.........................................................................18
SECTION 303.      Execution, Authentication, Delivery and
                  Dating................................................................................18
SECTION 304.      Temporary Securities..................................................................22
SECTION 305.      Registration, Registration of
                  Transfer and Exchange.................................................................22
SECTION 306.      Mutilated, Destroyed, Lost and Stolen
                  Securities............................................................................24
SECTION 307.      Payment of Interest; Interest Rights
                  Preserved.............................................................................25
SECTION 308.      Persons Deemed Owners.................................................................27
SECTION 309.      Cancellation..........................................................................27
SECTION 310.      Computation of Interest...............................................................28

-ii-

                                                                                                      Page
                                                                                                      ----
                         ARTICLE FOUR

                  Satisfaction and Discharge

SECTION 401.      Satisfaction and Discharge of Indenture...............................................28
SECTION 402.      Application of Trust Money............................................................29

                         ARTICLE FIVE

                           Remedies

SECTION 501.      Events of Default.....................................................................30
SECTION 502.      Acceleration of Maturity; Rescission and
                  Annulment.............................................................................32
SECTION 503.      Collection of Indebtedness and Suits for
                  Enforcement by Trustee................................................................32
SECTION 504.      Trustee May File Proofs of Claim......................................................33
SECTION 505.      Trustee May Enforce Claims Without
                  Possession of Securities..............................................................34
SECTION 506.      Application of Money Collected........................................................34
SECTION 507.      Limitation on Suits...................................................................35
SECTION 508.      Unconditional Right of Holders to
                  Receive Principal, Premium and Interest...............................................36
SECTION 509.      Restoration of Rights and Remedies....................................................36
SECTION 510.      Rights and Remedies Cumulative........................................................36
SECTION 511.      Delay or Omission Not Waiver..........................................................36
SECTION 512.      Control by Holders....................................................................37
SECTION 513.      Waiver of Past Defaults...............................................................37
SECTION 514.      Undertaking for Costs.................................................................37


                          ARTICLE SIX

                          The Trustee


SECTION 601.      Certain Duties and Responsibilities of
                  the Trustee...........................................................................38
SECTION 602.      Notice of Defaults....................................................................38
SECTION 603.      Certain Rights of Trustee.............................................................39
SECTION 604.      Not Responsible for Recitals or Issuance
                  of Securities.........................................................................40
SECTION 605.      May Hold Securities...................................................................40
SECTION 606.      Money Held in Trust...................................................................40
SECTION 607.      Compensation and Reimbursement........................................................41
SECTION 608.      Disqualification; Conflicting Interests...............................................41
SECTION 609.      Corporate Trustee Required; Eligibility...............................................42
SECTION 610.      Resignation and Removal; Appointment of
                  Successor.............................................................................42
SECTION 611.      Acceptance of Appointment by Successor................................................44
SECTION 612.      Merger, Conversion, Consolidation or
                  Succession to Business................................................................45

-iii-

                                                                                                      Page
                                                                                                      ----
SECTION 613.      Preferential Collection of Claims
                  Against Company.......................................................................45
SECTION 614.      Appointment of Authenticating Agent...................................................46

                         ARTICLE SEVEN

       Holders' Lists and Reports by Trustee and Company


SECTION 701.      Company to Furnish Trustee Names and
                  Addresses of Holders..................................................................48
SECTION 702.      Preservation of Information;
                  Communications to Holders.............................................................48
SECTION 703.      Reports by Trustee....................................................................49
SECTION 704.      Reports by Company....................................................................50

                         ARTICLE EIGHT

        Consolidation, Merger, Lease, Sale or Transfer


SECTION 801.      When Company May Merge, Etc...........................................................51
SECTION 802.      Opinion of Counsel....................................................................51
SECTION 803.      Successor Corporation Substituted.....................................................52

                         ARTICLE NINE

                    Supplemental Indentures


SECTION 901.      Supplemental Indentures Without Consent
                  of Holders............................................................................52
SECTION 902.      Supplemental Indentures with Consent of
                  Holders...............................................................................54
SECTION 903.      Execution of Supplemental Indentures..................................................55
SECTION 904.      Effect of Supplemental Indentures.....................................................56
SECTION 905.      Conformity with Trust Indenture Act...................................................56
SECTION 906.      Reference in Securities to Supplemental
                  Indentures............................................................................56

                          ARTICLE TEN

                           Covenants


SECTION 1001.     Payments of Securities................................................................56
SECTION 1002.     Maintenance of Office or Agency.......................................................57
SECTION 1003.     Corporate Existence...................................................................57
SECTION 1004.     Payment of Taxes and Other Claims.....................................................57
SECTION 1005.     Compliance Certificates...............................................................57
SECTION 1006.     Commission Reports....................................................................58
SECTION 1007.     Waiver of Stay, Extension or Usury Laws...............................................59

-iv-

SECTION 1008.     Money for Securities Payments to Be Held
                  in Trust..............................................................................59

                        ARTICLE ELEVEN

                   Redemption of Securities


SECTION 1101.     Applicability of Article..............................................................61
SECTION 1102.     Election to Redeem; Notice to Trustee.................................................61
SECTION 1103.     Selection by Trustee of Securities to Be
                  Redeemed..............................................................................61
SECTION 1104.     Notice of Redemption..................................................................63
SECTION 1105.     Deposit of Redemption Price...........................................................64
SECTION 1106.     Securities Payable on Redemption Date.................................................64
SECTION 1107.     Securities Redeemed in Part...........................................................64

                        ARTICLE TWELVE

                         Sinking Funds


SECTION 1201.     Applicability of Article..............................................................65
SECTION 1202.     Satisfaction of Sinking Fund Payments
                  with Securities.......................................................................65
SECTION 1203.     Redemption of Securities for Sinking
                  Fund..................................................................................65

                       ARTICLE THIRTEEN

              Defeasance and Covenant Defeasance


SECTION 1301.     Applicability of Article; Company's
                  Option to Effect Defeasance or Covenant
                  Defeasance............................................................................66
SECTION 1302.     Defeasance and Discharge..............................................................66
SECTION 1303.     Covenant Defeasance...................................................................67
SECTION 1304.     Conditions to Defeasance or Covenant
                  Defeasance............................................................................67
SECTION 1305.     Deposited Money and Government
                  Obligations To Be Held In Trust.......................................................69

                       ARTICLE FOURTEEN

                         Miscellaneous


SECTION 1401.     Miscellaneous.........................................................................70

-v-

INDENTURE, dated as of July 1,1999 between PUBLIC SERVICE COMPANY OF COLORADO, a corporation duly organized and existing under the laws of the State of Colorado (herein called the "COMPANY"), having its principal office at 1225 17th Street, Denver, Colorado 80202, and The Bank of New York, a New York banking corporation, as Trustee (herein called the "TRUSTEE"), having its principal corporate trust office at 101 Barclay Street, Floor 21 West, New York, New York 10286.

RECITALS OF THE COMPANY

The Company has duly authorized the execution and delivery of this Indenture to provide for the issuance from time to time of its unsecured senior debentures, notes or other evidences of indebtedness (herein called the "SECURITIES"), to be issued in one or more series, authenticated and delivered, as in this Indenture provided.

All things necessary to make this Indenture a valid agreement of the Company, 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 or of the Securities of any series, without giving priority of any one Security or series over any other, except as otherwise expressly provided herein, 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:

(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 Trust Indenture Act, either directly or by reference therein, have the meanings assigned to them therein;

(3) all accounting terms not otherwise defined herein have the meanings assigned to them in accordance with GAAP;

-1-

(4) the word "INCLUDING" (and with correlative meaning "INCLUDE") means including, without limiting the generality of, any description preceding such term; and

(5) 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 Six, are defined in that Article.

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

"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 with respect to any Security, any Person authorized by the Trustee pursuant to Section 614 to act on behalf of the Trustee to authenticate such Securities.

"BANKRUPTCY LAW" means Title 11, U.S. Code, as in effect from time to time, or any similar federal or state law for the relief of debtors.

"BOARD OF DIRECTORS" means the board of directors of the Company; provided, however, that when the context refers to actions or resolutions of the Board of Directors, then the term "Board of Directors" shall also mean any duly authorized committee of the Board of Directors of the Company or Officer authorized to act with respect to any particular matter to exercise the power of the Board of Directors of the Company.

"BOARD RESOLUTION" means a copy of a resolution certified by the Secretary or an Assistant Secretary of the Company 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.

"BUSINESS DAY", when used with respect to any Place of Payment, means each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in that Place of Payment are authorized or obligated by law, regulation or executive order to close.

-2-

"COMMISSION" means the Securities and Exchange Commission, as from time to time constituted, created under the Exchange Act, or, if at any time after the execution of this instrument such Commission is not existing and performing the duties now assigned to it under the Trust Indenture Act, 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" or "COMPANY ORDER" means a written request or order signed in the name of the Company by its Chairman of the Board, its President or a Vice President, and by its Treasurer, an Assistant Treasurer, its Controller, an Assistant Controller, its Secretary or an Assistant Secretary, and delivered to the Trustee.

"CORPORATE TRUST OFFICE" means the principal office of the Trustee at which at any particular time its corporate trust business shall be administered, which office at the date hereof is located at 101 Barclay Street, Floor 21 West, New York, New
York 10286.

"COVENANT DEFEASANCE" has the meaning specified in
Section 1303.

"CUSTODIAN" means any receiver, trustee, assignee, liquidator, sequestrator or similar official under any Bankruptcy Law.

"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.

"DEFEASANCE" has the meaning specified in Section 1302.

"DEPOSITORY" means, with respect to the Securities of any series, or any Tranche thereof, issuable or issued in whole or in part in the form of one or more Global Securities, the Person designated as Depository by the Company pursuant to Section 301, which must be a clearing agency registered under the Exchange Act until a successor Depository shall have become such pursuant to the applicable provisions of this Indenture, and thereafter "Depository" shall mean or include each Person who is then a Depository hereunder, and if at any time there is more than one such Person, "Depository" shall mean the Depository with respect to the Securities of that series or Tranche.

-3-

"DOLLARS" and "$" means the 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 debt.

"EVENT OF DEFAULT" has the meaning specified in
Section 501.

"EXCHANGE ACT" means the Securities Exchange Act of 1934 and the rules and regulations promulgated thereunder, in each case as amended from time to time.

"GAAP" means generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Standards Accounting Board, and as are applicable to the financial statements of the Company, in each case as of the date of any computation required hereunder.

"GLOBAL SECURITY" means a Security that evidences all or part of the Securities of any series, or any Tranche thereof.

"HOLDER" or "SECURITYHOLDER" means, with respect to a Security, the Person in whose name such Security is registered in the Security Register (which terms, in the case of a Global Security, mean the Depository with respect to such Security).

"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, and any Tranche thereof, established as contemplated by Section 301.

"INTEREST", when used with respect to an Original Issue Discount Security which by its terms bears interest only after Maturity, means interest payable after Maturity.

"INTEREST PAYMENT DATE", when used with respect to any Security, means the Stated Maturity of an installment of interest on such Security.

"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, call for redemption or otherwise.

"OFFICER" means the Chairman of the Board, the Vice Chairman of the Board, the President, any Vice President, the Treasurer, any Assistant Treasurer, the Controller, the Secretary or any Assistant Secretary of the Company.

-4-

"OFFICER'S CERTIFICATE" means a certificate signed by an Officer and delivered to the Trustee.

"OPINION OF COUNSEL" means a written opinion of counsel, who may be an employee of or counsel for the Company, and who shall be reasonably acceptable 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 any Securities, means, as of the date of determination, all such Securities theretofore authenticated and delivered under this Indenture, except:

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

(ii) Securities, or portions thereof, for whose payment or redemption money in the necessary amount has been theretofore deposited with the Trustee or any Paying Agent (other than the Company) in trust or set aside and segregated in trust by the Company (if the Company shall act as its own Paying Agent) for the Holders of such Securities; provided that, if such Securities are to be redeemed prior to the Stated Maturity thereof, notice of such redemption has been duly given pursuant to this Indenture or provision therefor satisfactory to the Trustee has been made;

(iii) 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; and

(iv) Securities which have been defeased pursuant to
Section 1302;

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 (a) the principal amount of an Original Issue Discount Security that shall be deemed to be Outstanding for such purposes shall be that portion of the principal amount thereof that could be declared to be due and payable upon the occurrence of an Event of Default and the continuation thereof pursuant to the terms of such Original Issue Discount Security as of the date of such determination and (b) Securities owned by the Company or any other obligor upon the

-5-

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 pro tected in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Securities which the Trustee 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.

"PAYING AGENT" means any Person authorized by the Company to pay the principal of (and premium, if any) or interest, if any, on any Securities on behalf of the Company. The Company may act as Paying Agent with respect to any Securities issued hereunder.

"PERIODIC OFFERING" means an offering of Securities of a series from time to time any or all of the specific terms of which Securities, which may be in one or more Tranches, including the rate or rates of interest, if any, thereon, the Stated Maturity or Maturities thereof and the redemption provisions, if any, with respect thereto, are to be determined by the Company or its agents from time to time subsequent to the initial request for authentication and delivery of such Securities by the Trustee, all as contemplated in Section 301.

"PERSON" means any individual, corporation, partner ship, 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 any Security, means the place or places where the principal of (and premium, if any) and interest, if any, on such Security or any Tranche thereof, are payable as specified as contemplated by Section 301.

"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 shall be deemed (to the extent lawful) to evidence the same debt as the mutilated, destroyed, lost or stolen Security.

"REDEMPTION DATE", when used with respect to any Security to be redeemed, means the date fixed for such redemption by or pursuant to this Indenture.

-6-

"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" means any Security issued hereunder and registered in the Security Register.

"REGULAR RECORD DATE" for the interest payable on any Interest Payment Date on the Securities means the date specified for that purpose as contemplated by Section 301.

"RESPONSIBLE OFFICER", when used with respect to the Trustee, means any vice president, any assistant secretary, any assistant treasurer, any trust officer or assistant trust officer, or any other officer of the Trustee customarily performing functions similar to those performed by any of the above designated officers and also means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his knowledge of and familiarity with the particular subject.

"SECURITIES" has the meaning stated in the first recital of this Indenture and more particularly means any Securities authenticated and delivered under this Indenture.

"SECURITY REGISTER" and "SECURITY REGISTRAR" have the

respective meanings specified in Section 305.

"SPECIAL RECORD DATE" for the payment of any Defaulted Interest 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 as the fixed date on which the principal of such Security or such installment of principal or interest is due and payable.

"TRANCHE" means a group of Securities which (a) are of the same series and (b) are identical except as to principal amount and/or date of issuance.

"TRUST INDENTURE ACT" means the Trust Indenture Act of 1939, as amended, as in force at the date as of which this Indenture was executed; provided, however, that in the event that such Act is amended after such date, "TRUST INDENTURE ACT" means, to the extent required by such amendment, the Trust Indenture Act of 1939 as so amended.

-7-

"TRUSTEE" means the Person named as the "Trustee" in the first paragraph of this instrument 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, and if at any time there is more than one such Person, "Trustee" as used with respect to the Securities of any series shall mean the Trustee with respect to Securities of that series.

"U.S. GOVERNMENT OBLIGATIONS" means securities which are (i) direct obligations of the United States of America 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 the timely payment of which is unconditionally guaranteed by the full faith and credit of the United States of America which, in either case, are not callable or redeemable at the option of the issuer thereof or otherwise subject to prepayment, and shall also include a depository receipt issued by a New York Clearing House bank or trust company as custodian with respect to any such U.S. Government Obligation or a specific payment or interest on or principal of any such U.S. 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 or from any amount held by the custodian in respect of the U.S. Government Obligation or the specific payment of interest on or principal of the U.S. Government Obligation evidenced by such depository receipt.

"VICE PRESIDENT", when used with respect to the Company or the Trustee, means any vice president, whether or not designated by a number or a word or words added before or after the title "vice president".

SECTION 102. COMPLIANCE CERTIFICATES AND OPINIONS.

Upon any application or request by the Company to the Trustee to take any action under any provision of this Indenture, other than an action permitted by Sections 614 and 704 hereof, the Company shall furnish to the Trustee an Officer's 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 specifi cally required by any provision of this Indenture relating to such particular application or request, no additional certificate or opinion need be furnished.

-8-

Every certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture shall include:

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

b. 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;

c. 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 covenant or condition has been complied with; and

d. 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 with respect 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 may be based, insofar as it relates to legal matters, upon a certificate or opinion of, or representations by, counsel, unless such Officer has actual knowledge that the certificate or opinion or representations with respect to the matters upon which his certificate or opinion is based are erroneous. Any such certificate or Opinion of Counsel 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 stating that the information with respect to such factual matters is in the possession of the Company, unless such counsel has actual knowledge that the certificate or opinion or representations with respect to such matters are erroneous.

The provisions above requiring that certain persons have actual knowledge that certain matters or opinions are erroneous shall not be read to impose any duty of examination or investigation upon such persons.

-9-

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 may be embodied in and evidenced by one or more instruments of substantially similar tenor signed by such Holders in person or by agents duly appointed in writing; and, except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments are delivered to the Trustee and, where it is hereby expressly required, to the Company. Such instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the "ACT" of the Holders signing such instrument or instruments. Proof of execution of any such instrument or of a writing appointing any such agent shall be sufficient for any purpose of this Indenture and (subject to Section 601) conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section.

(b) The fact and date of the execution by any Person of any such instrument or writing may be proved by the affidavit or written statement (which need not be notarized) of a witness of such execution or by a certificate of a notary public or other officer authorized by law to take acknowledgments of deeds, certifying that the individual signing such instrument or writing acknowledged to him the execution thereof. Where such execution is by a signer acting in a capacity other than his individual capacity, such certificate, affidavit or written statement shall also constitute sufficient proof of his authority. The fact and date of the execution of any such instrument or writing, or the authority of the Person executing the same, may also be proved in any other manner which the Trustee and the Company deem sufficient.

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

(d) 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 or the Company in reliance thereon, whether or not notation of such action is made upon such Security.

(e) If the Company shall solicit from the Holders any request, demand, authorization, direction, notice, consent, waiver or other Act, the Company may, at its option, by Company

-10-

Order, 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 shall have no obligation to do so. 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 (i) 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 and/or (ii) which Holders may revoke any such Act (notwithstanding subsection (f) of this Section).

(f) Until such time as written instruments shall have been delivered to the Trustee with respect to the requisite percentage of principal amount of Securities for the action contemplated by such instruments, any such instrument executed and delivered by or on behalf of a Holder may be revoked with respect to any or all of such Securities by written notice by such Holder or any subsequent Holder, proven in the manner in which such instrument was proven.

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,

(a) the Trustee by any Holder or by the Company shall be sufficient for every purpose hereunder if made, given, furnished or filed in writing to or with the Trustee and received by the Trustee at its Corporate Trust Office, Attention: Corporate Trust Administration, or

(b) the Company by the Trustee or by any Holder shall be sufficient for every purpose hereunder (unless otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, to the Company addressed to it at the address of its principal office specified in the first paragraph of this Indenture, attention:
Secretary, or at any other address previously furnished in writing to the Trustee by the Company.

SECTION 106. NOTICE TO HOLDERS; WAIVER.

Where this Indenture or any Security provides for notice to Holders of any event, such notice shall be deemed sufficiently given (unless otherwise herein or in such Security expressly provided) if in writing and mailed, first-class postage prepaid, to each Holder affected by such event, at his address as

-11-

it 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 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 or the validity of the proceedings to which such notice relates. Where this Indenture or any Security 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.

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

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.

SECTION 107. CONFLICT WITH TRUST INDENTURE ACT.

If any provision hereof limits, qualifies or conflicts with another provision hereof which is required to be included in this Indenture by any of the provisions of the Trust Indenture Act, such required provision shall control. If any provision of this Indenture modifies or excludes any provision of the Trust Indenture Act that may be so modified or excluded, the latter provision shall be deemed to apply to this Indenture as so modified or shall be excluded, as the case may be.

SECTION 108. EFFECT OF HEADINGS AND TABLE OF CONTENTS.

The headings of the Articles and Sections herein and the Table of Contents are for convenience of reference only and shall not be taken to be any part of or to control or affect the meaning, construction or effect of provisions of this Indenture.

SECTION 109. SUCCESSORS AND ASSIGNS.

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

-12-

SECTION 110. SEPARABILITY CLAUSE.

If any provision of this Indenture or of the Securities, or the application of any such provision to any Person or circumstance, shall be held to be invalid, illegal or unenforceable, the remainder of this Indenture or of the Securities, or the application of such provision to Persons or circumstances other than those as to whom or which it is invalid, illegal or unenforceable, shall not in any way be affected or impaired thereby.

SECTION 111. BENEFITS OF INDENTURE.

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

SECTION 112. GOVERNING LAW.

This Indenture and the Securities shall be governed by and construed in accordance with the laws (other than the choice of law provisions) of the State of New York except to the extent that the Trust Indenture Act shall be applicable.

SECTION 113. LEGAL HOLIDAYS.

In any case where any Interest Payment Date, Redemption Date or Stated Maturity of any Security shall not be a Business Day in any Place of Payment, then (notwithstanding any other provision of this Indenture or of the Securities, other than a provision in Securities of any series, or any Tranche thereof, or in the indenture supplemental hereto, Board Resolution or Officer's Certificate that establishes the terms of the Securities of such series or Tranche, which specifically states that such provision shall apply in lieu of this Section) payment of interest or principal and premium, 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 or Redemption Date, or at the Stated Maturity, and, if such payment is made or duly provided for on such Business Day, no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date or Stated Maturity, as the case may be, to such Business Day.

SECTION 114. NO RECOURSE AGAINST OTHERS.

A director, officer, employee or stockholder, as such, of the Company shall not have any liability for any obligations of the Company under the Securities or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. Each Securityholder, by accepting a Security,

-13-

waives and releases all such liability. Such waivers and releases are part of the consideration for the issuance of the Securities.

ARTICLE TWO

SECURITY FORMS

SECTION 201. FORMS GENERALLY.

The definitive Securities of each series shall be in substantially such form or forms established as shall be established pursuant to
Section 301, with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as the Company may deem appropriate and as are not contrary to the provisions of this Indenture, or as may be required to comply with the rules of any securities exchange or of any automated quotation or book-entry system, or to conform to usage, all as may be determined by the officers executing such Securities, as evidenced by their execution of the Securities.

The Securities of each series shall be issuable in registered form without coupons. The definitive Securities shall be produced in such manner as shall be determined by the officers executing such Securities, as evidenced by their execution thereof.

SECTION 202. FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

The Trustee's certificate of authentication shall be in substantially the form set forth below:

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

Dated:                     By:
      ---------------         ------------------------------------
                               Authorized Signatory

-14-

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 may be issued from time to time in one or more series. There shall be established in or pursuant to a Board Resolution, and set forth in an Officer's Certificate, or established in one or more indentures supplemental hereto, prior to the issuance of Securities of any series:

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

(2) any limit upon the aggregate principal amount of the Securities of the series which 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 Sections 304, 305, 306, 906 or 1107);

(3) whether any Securities of the series, or any Tranche thereof, are to be issuable in global form with or without coupons and, if so, (i) whether beneficial owners of interests in any such Global Security may exchange such interests for Securities of such series and Tranche 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 (ii) the name of the Depository with respect to any Global Security;

(4) the date or dates on which the principal of the Securities of the series, or any Tranche thereof, is payable;

(5) the rate or rates at which the Securities of the series, or any Tranche thereof, shall bear interest, if any (including the rate or rates at which overdue principal shall bear interest, if different from the rate or rates at which such Securities shall bear interest prior to Maturity, and, if applicable, the rate or rates at which overdue premium or interest shall bear interest, if any), or any formulary or other method or other means by which any such rate or rates shall be determined, by reference to an index or other fact or event ascertainable outside this Indenture or otherwise; the date or dates from which such interest shall accrue, the Interest Payment Dates on which such interest shall be payable and the Regular Record Date for

-15-

the interest payable on any Interest Payment Date or any formulary or other method or other means by which such date or dates shall be determined, by reference to an index or other fact or event ascertainable outside of this Indenture or otherwise (without regard to any provisions for redemption, prepayment, acceleration, purchase or extension and, if applicable to such series of Securities, or any Tranche thereof, the basis points and United States Treasury rate(s) and any other rates to be used in calculating the reset rate;

(6) the place or places where the principal of (and premium, if any) and interest, if any (if such interest is not to be paid as specified in Section 307), on Securities of the series, or any Tranche thereof, shall be payable;

(7) the right of the Company, if any, to defer any payment of principal of or interest on the Securities of the series, or any Tranche thereof, and the maximum length of any such deferral period;

(8) the period or periods within which, the price or prices at which and the terms and conditions upon which Securities of the series, or any Tranche thereof, may be redeemed, in whole or in part, at the option of the Company, pursuant to any sinking fund or otherwise;

(9) the obligation, if any, of the Company to redeem or purchase Securities of the series, or any Tranche thereof, pursuant to any sinking fund or analogous provisions or at the option of a Holder thereof and the period or periods within which, the price or prices at which and the terms and conditions upon which Securities of the series, or any Tranche thereof, shall be redeemed or purchased, in whole or in part, pursuant to such obligation, and, where applicable, the obligation of the Company to select the Securities to be redeemed;

(10) if other than denominations of $1,000 and any integral multiple thereof, the denominations in which Securities of the series, or any Tranche thereof, shall be issuable;

(11) if other than the principal amount thereof, the portion of the principal amount of Securities of the series, or any Tranche thereof, which shall be payable upon declaration of acceleration of the Maturity thereof pursuant to Section 502;

(12) additional Events of Default with respect to Securities of the series, or any Tranche thereof, if any, other than those set forth herein;

-16-

(13) if either or both of Section 1302 and Section 1303 shall be inapplicable to the Securities of the series, or any Tranche thereof, (provided that if no such inapplicability shall be specified, then both Section 1302 and Section 1303 shall be applicable to the Securities of the series, or any Tranche thereof);

(14) if other than U.S. dollars, the currency or currencies or units based on or related to currencies in which the Securities of such series, or any Tranche thereof, shall be denominated and in which payments or principal of, and any premium and interest on, such Securities shall or may by payable;

(15) additional covenants with respect to Securities of the series, or any Tranche thereof, if any, other than those set forth herein;

(16) if other than the Trustee, the identity of the Registrar and any Paying Agent;

(17) any exceptions to Section 113 or in the definition of "Business Day" with respect to Securities of the series, or any Tranche thereof; and

(18) any other terms of the Securities of the series, or any Tranche thereof (which terms shall not be inconsistent with the provisions of this Indenture).

All Securities of any one series shall be substantially identical except as to denomination and except as may otherwise be provided in or pursuant to such Board Resolution and set forth in such Officer's Certificate or in any such indenture supplemental hereto.

With respect to Securities of a series subject to a Periodic Offering, the indenture supplemental hereto or the Board Resolution which establishes such series, or the Officer's Certificate pursuant to such Board Resolution, may provide general terms or parameters for Securities of such series and provide either that the specific terms of Securities of such series, or any Tranche thereof, shall be specified in a Company Order or that such terms shall be determined by the Company or its agents in accordance with procedures specified in a Company Order as contemplated by Section 303.

Anything herein to the contrary notwithstanding, the Trustee shall be under no obligation to authenticate and deliver Securities of any series the terms of which, established as contemplated by this Section, would affect the rights, duties, obligations, liabilities or immunities of the Trustee under this Indenture.

-17-

SECTION 302. DENOMINATIONS.

The Securities shall be issuable in registered form without coupons in such denominations as shall be specified as contemplated by Section
301. In the absence of any such provisions with respect to the Securities of any series, or any Tranche thereof, the Securities of such series or Tranche shall be issuable in denominations of $1,000 and any integral multiple thereof.

SECTION 303. EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

The Securities shall be executed on behalf of the Company by its Chairman of the Board, its Vice Chairman of the Board, its President or one of its Vice Presidents, under its corporate seal reproduced thereon attested by its Secretary or one of its Assistant Secretaries. The signature of any of these officers on the Securities may be manual or facsimile. The seal of the Company may be in the form of a facsimile thereof and may be impressed, affixed, imprinted or otherwise reproduced on the Securities. Typographical and other minor errors or defects in any such reproduction of the seal or any such signature shall not affect the validity or enforceability of any Security that has been duly authenticated and delivered by the Trustee.

Securities 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 in dividuals 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.

At any time and from time to time after the original execution and delivery of this Indenture, the Company may deliver Securities of any series, executed by the Company, to the Trustee for authentication. Except as otherwise provided in this Article Three, the Trustee shall thereupon authenticate and make available for delivery, or cause to be authenticated and delivered, said Securities to or upon a Company Order, without any further action by the Issuer; PROVIDED, HOWEVER, that the Trustee shall authenticate and make available for delivery Securities of such series for original issue from time to time in the aggregate principal amount established for such series pursuant to such procedures, acceptable to the Trustee and to such recipients, as may be specified from time to time by a Company Order. The Stated Maturity, original issue dates, interest rates and any other terms of the Securities of such series, or any Tranche thereof, shall be determined by or pursuant to such Company Order and procedures. If provided for in such procedures, such Company Order may authorize authentication and delivery pursuant to oral instructions from the Company or its duly authorized agent, which instructions shall be promptly confirmed in writing.

-18-

In authenticating the Securities of such series and accepting the responsibilities under this Indenture in relation to such Securities, the Trustee shall be entitled to receive, prior to the initial authentication of the Securities of such series, and (subject to Section 601) shall be fully protected in relying upon:

(1) a Board Resolution relating thereto certified by the Secretary or Assistant Secretary of the Company;

(2) an Officer's Certificate or an executed supplemental indenture setting forth the terms of such Securities as provided in
Section 301;

(3) an Officer's Certificate which shall state that all conditions precedent provided for in this Indenture relating to the issuance of such Securities have been complied with, that no Event of Default with respect to any series of Securities, or any Tranche thereof, has occurred and is continuing and that the issuance of such Securities does not constitute and will not result in (i) any Event of Default or any event or condition, which, upon the giving of notice or the lapse of time or both, would become an Event of Default or (ii) any default under the provisions of any other instrument or agreement by which the Company is bound; and

(4) an Opinion of Counsel, which shall state:

(a) that the form or forms of such Securities have been duly authorized by the Company and have been established in conformity with the provisions of this Indenture;

(b) that the term or terms of such Securities have been duly authorized by the Company and have been established in conformity with the provisions of this Indenture;

(c) that such Securities, when authenticated and delivered by the Trustee and issued by the Company in the manner and subject to any conditions specified in such Opinion of Counsel, will constitute valid and legally binding obligations of the Company, enforceable in accordance with their terms, except to the extent enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium and other similar laws affecting the enforcement of creditors' rights generally and by the effect of general principles of equity (regardless of whether enforceability is considered in a proceeding in equity or at law); and

(d) that no consent, approval, authorization, order, registration or qualification of or with any court or any

-19-

governmental agency or body having jurisdiction over the Company is required for the execution and delivery of such Securities by the Company, except such as have been obtained (except that no opinion need be expressed as to state securities or Blue Sky laws).

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 or immunities under the Securities and this Indenture in a manner that in the written opinion of counsel to the Trustee (which counsel may be an employee of the Trustee) such authentication may not lawfully be made or would involve the Trustee in personal liability.

Notwithstanding the provisions of Section 301 and of the immediately preceding paragraph, with respect to Securities of a series subject to a Periodic Offering, the Trustee shall be entitled to receive the Officer's Certificate otherwise required pursuant to Section 303(3) and the Opinion of Counsel required by Section 303(4) only once at or prior to the time of the first authentication and delivery of such Securities (provided that such Opinion of Counsel addresses the authentication and delivery of all such Securities) and that, in lieu of the opinions described in clauses (b) and (c) above, Counsel may opine that:

(x) when the terms of such Securities shall have been established pursuant to a Company Order or Orders or pursuant to such procedures as may be specified from time to time by a Company Order or Orders, all as contemplated by and in accordance with the instrument or instruments delivered pursuant to clause (a) above, such terms will have been duly authorized by the Company and will have been established in conformity with the provisions of this Indenture; and

(y) when such Securities shall have been authenticated and delivered by the Trustee in accordance with this Indenture and the Company Order or Orders or the specified procedures referred to in paragraph (x) above and issued and delivered by the Company in the manner and subject to any conditions specified in such Opinion of Counsel, such Securities will constitute valid obligations of the Company enforceable in accordance with their terms except to the extent enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium and other similar laws affecting the enforcement of creditors rights generally and by the effect of general principles of equity (regardless of whether enforceability is considered in a proceeding in equity or at law).

-20-

With respect to Securities of a series subject to a Periodic Offering, the Trustee may conclusively rely, as to the authorization by the Company of any of such Securities, the forms and terms thereof, the validity thereof and the compliance of the authentication and delivery thereof with the terms and conditions of this Indenture, upon the Opinion or Opinions of Counsel, the Officer's Certificate and the certificates and other documents delivered pursuant to this Section 303 at or prior to the time of the first authentication and delivery of Securities of such series until any of such opinions, certificates or other documents have been superseded or revoked or expire by their terms; PROVIDED, HOWEVER, that any request by the Company to the Trustee to authenticate and deliver Securities of such series shall constitute a representation and warranty by the Company that as of the date of such request the statements made in the most recent Officer's Certificate delivered pursuant to Section 303(3) are true and correct as if made on and as of the date thereof.

If the Company shall establish pursuant to Section 301 that the Securities of a series, or any Tranche thereof, are to be issued in the form of one or more Global Securities, then the Company shall execute and the Trustee shall, in accordance with this Section and the Company Order with respect to the authentication and delivery of such series or Tranche, authenticate and deliver one or more Global Securities that (i) shall be in an aggregate amount equal to the aggregate principal amount specified in such Company Order, (ii) shall be registered in the name of the Depository therefor or its nominee, and (iii) shall be made available for delivery by the Trustee to such Depository or pursuant to such Depository's instruction.

Each Depository designated pursuant to Section 301 must, at the time of its designation and at all times while it serves as Depository, be a clearing agency registered under the Exchange Act and any other applicable statute or regulation.

Unless otherwise provided for in the form of Security, each Security shall be dated the date of its authentication and except that any substitute Security under Section 306 shall be dated so that neither gain nor loss in interest shall result from any mutilation, destruction, loss or theft of the relevant Predecessor Security.

No Security shall be entitled to any benefit under this Indenture or be valid or obligatory for any purpose unless there appears on such Security a certificate of authentication substantially in the form provided for herein executed by the Trustee by manual signature, 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.

-21-

SECTION 304. TEMPORARY SECURITIES.

Pending the preparation of definitive Securities of any series, or any Tranche thereof, the Company may execute, and upon Company Order the Trustee shall authenticate and make available for delivery, temporary Securities which are printed, lithographed, typewritten, mimeographed or otherwise produced, in any authorized denomination, substantially of the tenor of the definitive Securities in lieu of which they are issued and with such appropriate insertions, omissions, substitutions and other variations as the officers executing such Securities may deter mine, as evidenced by their execution of such Securities.

In the case of Securities of any series, or any Tranche thereof, such temporary Securities may be in global form, representing all or a portion of the Outstanding Securities of such series or Tranche.

Except in the case of temporary Securities in global form (which shall be exchanged in accordance with the provisions of Section 305), if temporary Securities of any series, or any Tranche thereof, are issued, the Company will cause definitive Securities of that series or Tranche thereof to be prepared without unreasonable delay. After the preparation of definitive Securities of such series, or any Tranche thereof, the temporary Securities of such series or Tranche shall be exchangeable for definitive Securities of such series or Tranche thereof upon surrender of the temporary Securities of such series or Tranche thereof at the office or agency of the Company in a Place of Payment for that series or Tranche without charge to the Holder. Upon surrender for cancellation of any one or more temporary Securities of any series, or any Tranche thereof, the Company shall execute and the Trustee shall authenticate and make available for delivery in exchange therefor a like principal amount of definitive Securities of the same series, or Tranche thereof, of authorized denominations and of like tenor. Until so exchanged, the temporary Securities of any series, or any Tranche thereof, shall in all respects be entitled to the same benefits under this Indenture as definitive Securities of such series, or any Tranche thereof.

SECTION 305. REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE.

The Company shall cause to be kept at the Corporate Trust Office of the Trustee a register (the register maintained in such office and in any other office or agency of the Company in a Place of Payment being herein sometimes collectively referred to as the "SECURITY REGISTER") in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Securities of each series, or Tranche thereof, and of registration of transfers of Securities of each series, or Tranche thereof. The Trustee is hereby

-22-

appointed "SECURITY REGISTRAR" for the purpose of registering Securities and transfers of Securities as herein provided.

Upon surrender for registration of transfer of any Security of any series or any Tranche thereof, at the office or agency of the Company in the Place of Payment for that series or Tranche thereof, the Company shall execute, and the Trustee shall authenticate and make available for delivery, in the name of the designated transferee or transferees, one or more new Securities of the same series and Tranche, of any authorized denominations and of a like aggregate principal amount and Stated Maturity.

At the option of the Holder, Securities of any series or any Tranche thereof, may be exchanged for other Securities of the same series and Tranche, of any authorized denominations and of a like aggregate principal amount and Stated Maturity, upon surrender of the Securities to be exchanged at such office or agency. Whenever any Securities are so surrendered for exchange, the Company shall execute, and the Trustee shall authenticate and make available for delivery, the Securities which the Holder making the exchange is entitled to receive.

The provisions of Clauses (1), (2), (3) and (4) below shall apply only to Global Securities:

(1) Each Global Security authenticated under this Indenture shall be registered in the name of the Depository designated for such Global Security or a nominee thereof and delivered to such Depository or a nominee thereof or custodian therefor, and each such Global Security shall constitute a single Security for all purposes of this Indenture.

(2) Notwithstanding any other provision in this Indenture, no Global Security may be exchanged in whole or in part for Securities registered, and no transfer of a Global Security in whole or in part may be registered, in the name of any Person other than the Depository for such Global Security or a nominee thereof unless (A) such Depository (i) has notified the Company that it is unwilling or unable to continue as Depository for such Global Security or (ii) has ceased to be a clearing agency registered under the Exchange Act, (B) there shall have occurred and be continuing an Event of Default with respect to such Global Security or (c) there shall exist such circumstances, if any, in addition to or in lieu of the foregoing as have been specified for this purpose as contemplated by Section 301.

(3) Subject to Clause (2) above, any exchange of a Global Security for other Securities may be made in whole or in part, and all Securities issued in exchange for a Global Security or any portion thereof shall be registered in such names as the Depository for such Global Security shall direct.

-23-

(4) Every Security authenticated and delivered upon registration of transfer of, or in exchange for or in lieu of, a Global Security or any portion thereof, whether pursuant to this Section,
Section 304, 306, 906 or 1107 or otherwise, shall be authenticated and delivered in the form of, and shall be, a Global Security, unless such Security is registered in the name of a Person other than the Depository for such Global Security or a nominee thereof.

All Securities issued upon any registration of transfer or exchange of Securities shall be the 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 Security presented or surrendered for registration of transfer or for exchange shall (if so required by the Company or the Trustee) 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.

Unless otherwise provided in the Securities to be transferred or exchanged, 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 or 1107 not involving any transfer.

The Company shall not be required (i) to issue, register the transfer of or exchange Securities of any series, or any Tranche thereof, during a period beginning at the opening of business 15 days before the day of the mailing of a notice of redemption of Securities of that series or Tranche selected for redemption under Section 1103 and ending at the close of business on the day of such mailing, or (ii) to register the transfer of or exchange any Security so selected for redemption in whole or in part, except the unredeemed portion of any Security being redeemed in part.

SECTION 306. MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES.

If any mutilated Security is surrendered to the Trustee, the Company shall execute and the Trustee shall authenticate and make available for delivery in exchange therefor a new Security of the same series and Tranche, and of like tenor and principal amount and bearing a number not contemporaneously outstanding.

If there shall be delivered to the Company and the Trustee (i) evidence to their satisfaction of the destruction, loss or theft of any Security and (ii) such security or indemnity

-24-

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 has been acquired by a bona fide purchaser, the Company shall execute and upon its request the Trustee shall authenticate and make available for delivery, in lieu of any such destroyed, lost or stolen Security, a new Security of the same series and Tranche, and of like tenor and principal amount and bearing a number not contemporaneously outstanding.

In case any such mutilated, destroyed, lost or stolen Security has become or is about to become due and payable, the Company in its discretion may, instead of issuing a new Security, pay such Security.

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 issued pursuant to this Section in lieu of any destroyed, lost or stolen Security shall constitute an original additional contractual obligation of the Company, whether or not the destroyed, lost or stolen Security 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 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.

SECTION 307. PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

Unless otherwise specified as contemplated by Section 301 with respect to the Securities of any series, or Tranche thereof, interest on any Security which 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 any Paying Agent therefor; provided however, that unless otherwise specified as contemplated by Section 301 with respect to the Securities of any series, or any Tranche thereof, interest on any Security shall be paid by check mailed to the address of the Person entitled thereto as such address appears on the Security Register; and, further, provided that interest payable at Maturity shall be paid to the Person to whom principal is paid at Maturity.

Any interest on any Security of any series, or Tranche thereof, which is payable, but is not punctually paid or duly

-25-

provided for, on any Interest Payment Date (herein called "DEFAULTED INTEREST") shall forthwith cease to be payable to the Holder 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 Securities of such series or Tranche thereof (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 Security of such series or any Tranche thereof and the date of the proposed payment, and at the same time the Company shall deposit with the Trustee an amount of money 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 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
Section 307 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 Securities of such series or any Tranche thereof 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 so mailed, such Defaulted Interest shall be paid to the Persons in whose names the Securities of such series or any Tranche thereof (or their respective Predecessor Securities) are registered at the close of business on such Special Record Date and shall no longer be payable pursuant to the following Clause (2).

(2) The Company may make payment of any Defaulted Interest on the Securities of any series, or any Tranche thereof, 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

-26-

this Section 307, such manner of payment shall be deemed practicable by the Trustee.

Subject to the foregoing provisions of this Section, 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. PERSONS DEEMED OWNERS.

Prior to due presentment of a Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name such 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 Section 307) interest, if any, on such Security and for all other purposes whatsoever, whether or not such Security be overdue, and neither the Company, the Trustee nor any agent of the Company or the Trustee shall be affected by notice to the contrary.

None of the Company, the Trustee or any agent of the Company or the Trustee shall have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interest of a Security in global form, or for maintaining, supervising or reviewing any records relating to such beneficial ownership interest. Notwithstanding the foregoing, with respect to any Security in global form, nothing herein shall prevent the Company or the Trustee or any agent of the Company or the Trustee from giving effect to any written certification, proxy or other authorization furnished by any Depository (or its nominee), as a Holder, with respect to such Security in global form or impair, as between such Depository and owners of beneficial interests in such Security in global form, the operation of customary practices governing the exercise of the right of such Depository (or its nominee) as holder of such Security in global form.

SECTION 309. CANCELLATION.

All Securities surrendered for payment, redemption, 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 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 all Securities so delivered shall be promptly cancelled by the Trustee. 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. All cancelled Securities shall be held

-27-

by the Trustee and shall be returned to the Company upon written request.

SECTION 310. COMPUTATION OF INTEREST.

Except as otherwise specified as contemplated by Section 301 for Securities of any series, or any Tranche thereof, 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 and, with respect to any period less than a full calendar month, on the basis of the actual number of days elapsed during such period in relation to the deemed 30 days of such month.

ARTICLE FOUR

SATISFACTION AND DISCHARGE

SECTION 401. SATISFACTION AND DISCHARGE OF INDENTURE.

This Indenture shall cease to be of further effect (except as to any surviving rights of registration of transfer or exchange of Securities herein expressly provided for or in the form of Security for such series or Tranche), when the Trustee, upon Company Request and at the expense of the Company, shall execute proper instruments acknowledging satisfaction and discharge of this Indenture, when

(1) either

(A) all Securities theretofore authenticated and delivered (other than (i) Securities which have been destroyed, lost or stolen and which have been replaced or paid as provided in Section 306 and (ii) Securities for whose payment money or U.S. Government Obligations 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 1008) have been delivered to the Trustee for cancellation; or

(B) all such Securities 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) 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,

-28-

and the Company, in the case of (i), (ii) or (iii) above, has deposited with the Trustee as trust funds in trust for the purpose (a) money in the necessary amount or (b) U.S. Government Obligations, the principal of and the interest on which when due, and without any regard to reinvestment thereof, in the opinion of an independent accountant, and, in the opinion of the officers of the Company executing an Officer's Certificate to that effect, will provide moneys which, together with the moneys, if any, deposited with or held by the Trustee, shall be sufficient to pay when due the principal of, premium, if any, and interest due and to become due on said Securities or portions thereof on the Redemption Date or the Stated Maturity thereof, as the case may be, in trust to pay and discharge the entire indebtedness on such Securities not theretofore delivered to the Trustee for cancellation, for 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 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 Officer's Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for herein relating to the satisfaction and discharge of this Indenture have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the obligations of the Company to the Trustee under Section 607, the obligations of the Company to any Authenticating Agent under Section 614 and, if money or U.S. Government Obligations 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 1008 shall survive.

SECTION 402. APPLICATION OF TRUST MONEY.

Subject to the provisions of the last paragraph of Section 1008, all money or U.S. Government Obligations 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 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 or U.S. Government Obligations has been deposited with or received by the Trustee.

-29-

ARTICLE FIVE

REMEDIES

SECTION 501. EVENTS OF DEFAULT.

"EVENT OF DEFAULT," wherever used herein with respect to the Securities of any series means any one of the following events:

(1) failure to pay interest on any Security of that series when such interest becomes due and payable and such failure continues for a period of 30 days and the time for payment of such interest has not been extended; provided, however that if the Company is permitted by the terms of the Securities of the applicable series to defer the payment in question, the date on which such payment is due and payable shall be the date on which the Company is required to make payment following such deferral, if such deferral has been elected pursuant to the terms of the Securities of that series; or

(2) failure to pay principal of (or premium, if any, on) any Security of that series when the same becomes due and payable at Maturity (including redemptions under Article Eleven but excluding any failure by the Company to deposit money with the Trustee in connection with any redemption at the option of the Company) and the time for payment of such principal (or premium, if any), has not been extended; provided, however, that if the Company is permitted by the terms of the Securities of the applicable series to defer the payment in question, the date on which such payment is due and payable shall be the date on which the Company is required to make payment following such deferral, if such deferral has been elected pursuant to the terms of the Securities of that series; or

(3) the Company fails to observe or perform any of its other covenants, warranties or agreements in the Securities of that series or in this Indenture (other than a covenant, agreement or warranty a default in whose performance or whose breach is elsewhere in this Section specifically dealt with or which has expressly been included in this Indenture solely for the benefit of series of Securities other than that series), and the failure to observe or perform continues for the period and after the notice specified in the last paragraph of this Section; or

(4) the Company pursuant to or within the meaning of any Bankruptcy Law (A) commences a voluntary case or proceeding under any Bankruptcy Law with respect to itself, (B) consents to the entry of a judgment, decree or order for relief against it in an involuntary case or proceeding under any Bankruptcy Law, (c) consents to or acquiesces in the institution of bankruptcy or insolvency proceedings against it, (D) applies for, consents to or acquiesces in the appointment of or taking possession by a

-30-

Custodian of the Company or for any material part of its property, (E) makes a general assignment for the benefit of its creditors, (F) admits in writing its inability to pay its debts generally as they become due, or (G) takes any corporate action in furtherance of or to facilitate, conditionally or otherwise, any of the foregoing; or

(5) (i) a court of competent jurisdiction enters a judgment, decree or order for relief in respect of the Company in an involuntary case or proceeding under any Bankruptcy Law which shall (A) approve as properly filed a petition seeking reorganization, arrangement, adjustment or composition in respect of the Company, (B) appoint a Custodian of the Company or for any material part of its property or (c) order the winding-up or liquidation of its affairs, and such judgment, decree or order shall remain unstayed and in effect for a period of 60 consecutive days; or (ii) any bankruptcy or insolvency petition or application is filed, or any bankruptcy or insolvency proceeding is commenced against the Company and such petition, application or proceeding is not dismissed within 60 days; or (iii) a warrant of attachment is issued against any material portion of the property of the Company which is not released within 60 days of service; or

(6) failure to pay any installment of interest, when the same shall become due and payable, on any other series of Securities issued or hereafter issued pursuant to this Indenture and such failure shall continue for a period of thirty days, or failure to pay the principal of (or premium, if any, on) any such other series of Securities when the same shall become due and payable at Maturity (including upon redemption but excluding any failure by the Company to deposit money with the Trustee in connection with any redemption at the option of the Company), and the time for payment of such interest or principal (or premium, if any) shall not have been extended; provided, however, that if the Company is permitted by the terms of the Securities of the applicable series to defer the payment in question, the date on which such payment is due shall be the date on which the Company is required to make payment following such deferral, if such deferral has been elected pursuant to the terms of the Securities of that series; or

(7) any other Event of Default provided with respect to Securities of that series as contemplated by Section 301.

A Default under clause (3) above is not an Event of Default until the Trustee or the Holders of at least 25% in aggregate principal amount of the Outstanding Securities of that series notify the Company in writing of the Default and the Company does not cure the Default within 60 days after receipt of the notice. The notice must specify the Default, demand that it be remedied and state that the notice is a "Notice of Default". When a Default under clause (3) above is cured within such 60-day period, it ceases.

-31-

SECTION 502. ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.

If an Event of Default with respect to Securities of any series, (other than an Event of Default specified in clause (4) or (5) of
Section 501) occurs and is continuing, the Trustee by notice in writing to the Company, or the Holders of at least 25% in aggregate principal amount of the Outstanding Securities of the affected series by notice in writing to the Company and the Trustee, may declare the unpaid principal of and accrued interest, if any, to the date of acceleration (or, if the Securities of that series, or any Tranche thereof, are Original Issue Discount Securities, such portion of the principal amount as may be specified in the terms of that series) on all the Outstanding Securities of that series, to be due and payable immediately and, upon any such declaration, the Outstanding Securities of that series (or specified principal amount) shall become and be immediately due and payable.

If an Event of Default specified in clause (4) or (5) of
Section 501 occurs, all unpaid principal of and accrued interest, if any, on the Outstanding Securities of all series (or specified principal amount) 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.

The Holders of a majority in principal amount of the Outstanding Securities of the affected series by notice to the Trustee may rescind an acceleration and its consequences if (i) all existing Events of Default, other than the nonpayment of the principal and interest of the Securities of that series that has become due solely by such declaration of acceleration, have been cured or waived, (ii) to the extent the payment of such interest is lawful, interest on overdue installments of interest and overdue principal that has become due otherwise than by such declaration of acceleration have been paid, (iii) the rescission would not conflict with any judgment or decree of a court of competent jurisdiction and (iv) all payments due to the Trustee and any predecessor Trustee under Section 607 have been made.

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 interest on any Security when such interest 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 at the Maturity thereof,

the Company will, upon demand of the Trustee, pay to it, for the benefit of the Holders of such Securities, the whole amount then

-32-

due and payable on such Securities for principal (and premium, if any) and interest, if any, and, to the extent that payment of such interest shall be legally enforceable, interest on any overdue principal (and premium, if any) and on any overdue interest, at the rate or rates prescribed therefor in such Securities, and, in addition thereto, such further amount as shall be sufficient to cover the reasonable 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, may prosecute such proceeding to judgment or final decree and may enforce the same against the Company or any other obligor upon such Securities 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, wherever situated.

If an Event of Default with respect to any Securities occurs and is continuing, the Trustee may in its discretion proceed to protect and enforce its rights and the rights of the Holders thereof 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 secure any other proper remedy.

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 or any other obligor upon the Securities or the property of the Company or of such other obligor or their creditors, the Trustee (irrespective of whether the principal of the Securities 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 overdue principal or interest) shall be entitled and empowered, by intervention in such proceeding or otherwise,

(i) to file and prove a claim for the whole amount of principal (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 agent and counsel) and of the Holders allowed in such judicial proceedings, and

-33-

(ii) 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 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 it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 607.

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

SECTION 505. TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF SECURITIES.

All rights of action and claims under this Indenture or the Securities may be prosecuted and enforced by the Trustee without the possession of any of the Securities 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 for the ratable benefit of the Holders of the Securities 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 in respect of the Securities of any series 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 in respect of which moneys have been collected 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 under Section 607 applicable to such series;

Second: To the payment of the amounts then due and unpaid for principal of (and premium, if any) and interest, if any, on the Securities 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 amounts due and payable

-34-

on such Securities of such series for principal (and premium, if any) and interest, if any, respectively; and

Third: To the Company.

The Trustee may fix a record date and payment date for any payment to Holders pursuant to this Section 506. At least fifteen (15) days before such record date, the Trustee shall mail to each Holder and the Company a notice that states the record date, the payment date and the amount to be paid.

SECTION 507. LIMITATION ON SUITS.

No Holder of any series of Securities 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 the affected 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 the affected series; it being understood and intended that no one or more of Holders of Securities of any affected series shall have any right in any manner whatever by virtue of, or by availing of, any provision of this Indenture to affect, disturb 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 Holders of Securities of the affected series.

-35-

SECTION 508. UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE PRINCIPAL, PREMIUM AND INTEREST.

Notwithstanding any other provision in this Indenture, the Holder of any Security shall have the right, which is absolute and unconditional, to receive payment of the principal of (and premium, if any) and (subject to Section 307) interest, if any, on such Security on the Stated Maturity or Maturities expressed in such Security (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 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, subject to any determination in such proceeding, the Company, the Trustee and the Holders shall 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 has 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 in the last paragraph of Section 306, no right or remedy herein conferred upon or reserved to the Trustee or to the Holders 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 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, as the case may be.

-36-

SECTION 512. CONTROL BY HOLDERS.

The Holders of a majority in principal amount of the Outstanding Securities of any affected 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) subject to Section 601, the Trustee need not take any action which might involve the Trustee in personal liability or be unduly prejudicial to the Holders not joining therein.

SECTION 513. WAIVER OF PAST DEFAULTS.

The Holders of not less than a majority in principal amount of the Outstanding Securities of any affected series may by written notice to the Trustee on behalf of the Holders of all the Securities of such series waive any Default or Event of Default with respect to such series and its consequences, except a Default or Event of Default

(1) in respect of the payment of the principal of (or premium, if any) or interest, if any, on any Security of such series, or

(2) in respect of a covenant or other 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 or Event of Default shall cease to exist and shall be deemed to have been cured, for every purpose of this Indenture and the Securities of such series; but no such waiver shall extend to any subsequent or other Default or Event of Default or impair any right consequent thereon.

SECTION 514. UNDERTAKING FOR COSTS.

All parties to this Indenture agree, and each Holder of any Security by his acceptance thereof shall be deemed to have agreed, that any court may in its discretion require, 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, suffered or omitted by it as Trustee, the filing by any party litigant in such suit of an undertaking to pay the costs of such suit, and

-37-

that such court may in its discretion assess reasonable costs, including reasonable attorneys' fees and expenses, against any party litigant in such suit, having due regard to the merits and good faith of the claims or defenses made by such party litigant; but the provisions of this Section shall not apply to any suit instituted by the Company, to any suit instituted by the Trustee, to any suit instituted by any Holder, or group of Holders, holding in the aggregate more than 10% in principal amount of the Outstanding Securities, or to any suit instituted by any Holder for the enforcement of the payment of the principal of (or premium, if any) or interest, if any, on any Security on or after the Stated Maturity or Maturities expressed in such Security (or, in the case of redemption, on or after the Redemption Date).

ARTICLE SIX

THE TRUSTEE

SECTION 601. CERTAIN DUTIES AND RESPONSIBILITIES OF THE TRUSTEE.

The Trustee hereby accepts the Trusts herein created. The Trustee further undertakes and agrees, as follows:

(a) Except during the continuance of an Event of Default, the Trustee's duties and responsibilities under this Indenture shall be governed by
Section 315(a) of the Trust Indenture Act.

(b) In case an Event of Default has occurred and is continuing, and is known to the Trustee, the Trustee shall exercise the rights and powers vested in it by this Indenture, and shall use the same degree of care and skill in their exercise, as a prudent man would exercise or use under the circumstances in the conduct of his own affairs.

(c) None of the provisions of Section 315(d) of the Trust Indenture Act shall be excluded from this Indenture.

SECTION 602. NOTICE OF DEFAULTS.

Within 30 days after the occurrence of any Default or Event of Default with respect to any Securities of any series, the Trustee shall give to all Holders of Securities of that series, as their names and addresses appear in the Security Register, notice of such Default or Event of Default known to the Trustee, unless such Default or Event of Default shall have been cured or waived; provided, however, that, except in the case of a Default or Event of Default in the payment of the principal of (or premium, if any) or interest, if any, on any Security or in the payment of any sinking fund installment with respect to Securities, the Trustee shall be protected in withholding such notice if and so long as the board of directors, the executive

-38-

committee or directors or Responsible Officers of the Trustee in good faith determine that the withholding of such notice is in the interest of the Holders of the affected Securities.

SECTION 603. CERTAIN RIGHTS OF TRUSTEE.

Subject to the provisions of the Trust Indenture Act:

(a) 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, other evidence of indebtedness or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties;

(b) any request or direction of the Company mentioned herein shall be sufficiently evidenced by a Company Request or Company Order and any resolution of the Board of Directors may be sufficiently evidenced by a Board Resolution;

(c) 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 an Officer's Certificate;

(d) the Trustee may consult with counsel of its selection and the written 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;

(e) 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 pursuant to this Indenture, unless such Holders shall have offered to the Trustee security or indemnity to its reasonable satisfaction against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction;

(f) prior to the occurrence of an Event of Default with respect to the Securities of any series and after the curing or waiving of all such Events of Default which may have occurred, 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, approval or other paper or document, or the books and records of the Company, unless requested in writing to do so by the Holders of a majority in principal amount of the Outstanding Securities of any series; provided, however, that if the payment within a reasonable time to the Trustee of

-39-

the costs, expenses or liabilities likely to be incurred by it in the making of such investigation is not, in the opinion of the Trustee, reasonably assured to the Trustee by the security afforded to it by the terms of this Indenture, the Trustee may require reasonable indemnity against such costs, expenses or liabilities as a condition to so proceeding; the reasonable expense of every such investigation shall be paid by the Company or, if paid by the Trustee, shall be repaid by the Company upon demand;

(g) the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys and the Trustee shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed with due care by it hereunder; and

(h) 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 its rights or powers.

SECTION 604. NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF SECURITIES.

The recitals herein and in the Securities, except the Trustee's certificates of authentication, shall be taken as the statements of the Company, and the Trustee or any Authenticating Agent assumes no responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Indenture or of the Securities. 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 605. MAY HOLD SECURITIES.

The Trustee, any Authenticating Agent, any Paying Agent, any Security Registrar or any other agent of the Company, in its individual or any other capacity, may become the owner or pledgee of Securities and, subject to Sections 608 and 613, may otherwise deal with the Company with the same rights it would have if it were not Trustee, Authenticating Agent, Paying Agent, Security Registrar or such other agent.

SECTION 606. MONEY HELD IN TRUST.

Money held by the Trustee in trust hereunder (including amounts held by the Trustee as Paying Agent) 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 upon in writing with the Company.

-40-

SECTION 607. 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 the parties shall agree 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 the 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 the Trustee for, and to hold it harmless against, any loss, liability, damage, claim or expense, including taxes (other than taxes based upon or determined or measured by the income of the Trustee), incurred without gross negligence or bad faith on its 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, a Securityholder or any other Person) or liability in connection with the exercise or performance of any of its powers or duties hereunder.

When the Trustee incurs expenses or renders services in connection with an Event of Default specified in Section 501(4) or Section 501(5), the expenses (including the reasonable charges and expenses of its counsel) and the compensation for the services are intended to constitute expenses of administration under any applicable federal or state bankruptcy, insolvency or other similar law.

The provisions of this Section 607 shall survive the discharge of this Indenture.

SECTION 608. DISQUALIFICATION; CONFLICTING INTERESTS.

The Trustee shall be disqualified only where such disqualification is required by Section 310(b) of the Trust Indenture Act. Nothing shall prevent the Trustee from filing with the Commission the application referred to in the second to last paragraph of Section 310(b) of the Trust Indenture Act.

-41-

SECTION 609. CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

There shall at all times be a Trustee hereunder which shall be eligible to act as Trustee under Section 310(a)(1) of the Trust Indenture Act having a combined capital and surplus of at least $50,000,000 subject to supervision or examination by federal or State authority. If such corporation publishes reports of condition at least annually, pursuant to law or to the requirements of said 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. Neither the Company nor any Person directly or indirectly controlling, controlled by, or under common control with the Company may serve as Trustee. If at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section, it shall resign immediately in the manner and with the effect hereinafter specified in this Article.

SECTION 610. 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 611.

(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. If the instrument of acceptance by a successor Trustee required by
Section 611 shall not have been delivered to the Trustee within 30 days after the giving of such notice of resignation, the resigning Trustee may petition any court of competent jurisdiction for the appointment of a successor Trustee with respect to the Securities of such series.

(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. If the instrument of acceptance by a successor Trustee required by
Section 611 shall not have been delivered to the Trustee within 30 days after the delivery of notice of removal, the Trustee may petition any court of competent jurisdiction for the appointment of a successor Trustee with respect to the Securities of such series.

(d) If at any time:

(1) the Trustee shall fail to comply with Section 310(b) of the Trust Indenture Act after written request therefor by the Company or by any Holder who has

-42-

been a BONA FIDE Holder of a Security for at least six months; or

(2) the Trustee shall cease to be eligible under Section 609 and shall fail to resign after written request therefor by the Company or by any such 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 a Board Resolution may remove the Trustee with respect to all Securities, or (ii) subject to Section 315(e) of the Trust Indenture Act, any Holder 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 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 a Board Resolution, shall promptly appoint a successor Trustee or Trustees with respect to the Securities of that or those series (it being 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) and shall comply with the applicable requirements of Section 611. 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 in accordance with the applicable requirements of Section 611, become the successor Trustee with respect to the Securities of such series and to that extent supersede the successor Trustee appointed by the Company with respect to such Securities. If no successor Trustee with respect to the Securities of any series shall have been so appointed by the Company or the Holders and accepted appointment in the manner required by Section 611, any Holder 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

-43-

for the appointment of a successor Trustee with respect to the Securities of such series.

(f) 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 by mailing written notice of such event by first-class mail, postage prepaid, to all Holders of Securities of such series as their names and addresses appear in the Security Register. 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 611. 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 so appointed 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 the 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.

(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 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 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

-44-

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 the Trust Indenture Act.

SECTION 612. 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 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 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 so authenticated with the same effect as if such successor Trustee had itself authenticated such Securities.

SECTION 613. PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

The Trustee shall comply with Section 311(a) of the Trust Indenture Act, excluding any creditor relationship listed in Section 311(b) of the Trust Indenture Act. A Trustee who has resigned or been removed shall be subject to Section 311(a) of the Trust Indenture Act to the extent indicated therein.

-45-

SECTION 614. 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, or any Tranche thereof, which shall be authorized to act on behalf of, and subject to the direction of, the Trustee to authenticate Securities of such series or Tranche issued upon exchange, registration of transfer or partial redemption thereof or pursuant to Section 306, 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. 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 acceptable to the Company and shall at all times be a corporation organized and doing business under the laws of the United States of America, any State thereof 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 authority. If such Authenticating Agent publishes reports of condition at least annually, pursuant to law or to the requirements of said 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. If 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 all or substantially all 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 any further act on the part of the Trustee or the Authenticating Agent.

An Authenticating Agent may resign at any time by giving written notice thereof to the Trustee and to the Company. The Trustee may at any time terminate the agency of an Authenticating Agent by giving written notice thereof to such Authenticating Agent and to the Company. Upon receiving such a notice of resignation or upon such a termination, or in case at

-46-

any time such Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, the Trustee may appoint a successor Authenticating Agent which shall be acceptable to the Company and shall mail written notice of such appointment by first-class mail, postage prepaid, to all Holders of Securities of the series, or Tranche thereof, with respect to which such Authenticating Agent will serve, as their names and addresses appear in the Security Register. 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. 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 for its services under this Section.

If an appointment with respect to one or more series or any Tranche thereof, is made pursuant to this Section, the Securities of such series or Tranche may have endorsed thereon, in addition to the Trustee's certificate of authentication, an alternate certificate of authentication in the following form:

Form of Authenticating Agent's Certificate of Authentication

Dated:

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


AUTHORIZED SIGNATORY

If all of the Securities of a series may not be originally issued at one time, and if the Trustee does not have an office capable of authenticating Securities upon original issuance located in a Place of Payment where the Company wishes to have Securities of such series authenticated upon original issuance, the Trustee, if so requested by the Company in writing (which writing need not comply with Section 102 and need not be accompanied by an Opinion of Counsel), shall appoint, in accordance with this Section and in accordance with such

-47-

procedures as shall be acceptable to the Trustee, an Authenticating Agent having an office in a Place of Payment designated by the Company with respect to such series of Securities.

ARTICLE SEVEN

HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701. COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF HOLDERS.

The Company will furnish or cause to be furnished to the Trustee:
(a) semi-annually, not later than January 15 and July 15 in each year, a list, in such form as the Trustee may reasonably require, of the names and addresses of the Holders as of the preceding December 15 or June 15, as the case may be; 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.

SECTION 702. PRESERVATION OF INFORMATION; COMMUNICATIONS TO HOLDERS.

(a) 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.

(b) If three or more Holders (herein referred to as "applicants") apply in writing to the Trustee, and furnish to the Trustee reasonable proof that each such applicant has owned a Security for a period of at least six months preceding the date of such application, and such application states that the applicants desire to communicate with other Holders with respect to their rights under this Indenture or under the Securities and is accompanied by a copy of the form of proxy or other communication which such applicants propose to transmit, then the Trustee shall, within five Business Days after the receipt of such application, at its election, either

(i) afford such applicants access to the information preserved at the time by the Trustee in accordance with Section 702(a); or

-48-

(ii) inform such applicants as to the approximate number of Holders whose names and addresses appear in the information preserved at the time by the Trustee in accordance with Section 702(a), and as to the approximate cost of mailing to such Holders the form of proxy or other communication, if any, specified in such application.

If the Trustee shall elect not to afford such applicants access to such information, the Trustee shall, upon the written request of such applicants, mail to each Holder whose name and address appears in the information preserved at the time by the Trustee in accordance with Section 702(a) a copy of the form of proxy or other communication which is specified in such request, with reasonable promptness after a tender to the Trustee of the material to be mailed and of payment, or provision for the payment, of the reasonable expenses of mailing, unless within five days after such tender the Trustee shall mail to such applicants and file with the Commission, together with a copy of the material to be mailed, a written statement to the effect that, in the opinion of the Trustee, such mailing would be contrary to the best interest of the Holders or would be in violation of applicable law. Such written statement shall specify the basis of such opinion. If the Commission, after opportunity for a hearing upon the objections specified in the written statement so filed, shall enter an order refusing to sustain any of such objections or if, after the entry of an order sustaining one or more of such objections, the Commission shall find, after notice and opportunity for hearing, that all objections so sustained have been met and shall enter an order so declaring, the Trustee shall mail copies of such material to all such Holders with reasonable promptness after the entry of such order and the renewal of such tender; otherwise the Trustee shall be relieved of any obligation or duty to such applicants respecting their application.

(c) Every Holder of Securities, by receiving and holding the same, agrees with the Company and the Trustee that neither the Company nor the Trustee nor any agent of either of them shall be held accountable by reason of the disclosure of any such information as to the names and addresses of the Holders in accordance with Section 702(b), 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 Section 702(b).

SECTION 703. REPORTS BY TRUSTEE.

(a) Within 60 days after May 15 of each year commencing with the year 2000, the Trustee shall transmit by mail to all Holders of Securities as provided in Section 313(c) of the Trust Indenture Act, a brief report dated as of May 15, if required by and in compliance with Section 313(a) of the Trust Indenture Act.

-49-

(b) A copy of each such report shall, at the time of such transmission to Holders, be filed by the Trustee with each stock exchange upon which any Securities are listed, with the Commission and with the Company. The Company will notify the Trustee when any Securities are listed on any stock exchange.

SECTION 704. REPORTS BY COMPANY.

The Company shall:

(1) file with the Trustee, within 30 days after the Company 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 may be required to file with the Commission pursuant to Section 13 or
Section 15(d) of the Exchange Act; or, if the Company is not required to file information, documents or reports pursuant to either of said Sections, then it shall 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 Exchange Act 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 with the conditions and covenants of this Indenture as may be required from time to time by such rules and regulations;

(3) transmit by mail to all Holders, as their names and addresses appear in the Security Register, (a) concurrently with furnishing the same to its stockholders, the Company's annual report to stockholders, containing certified financial statements, and any other financial reports which the Company generally furnishes to its stockholders, and (b) within 30 days after the filing thereof with the Trustee, such summaries of any other information, documents and reports required to be filed by the Company 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; and

(4) furnish to the Trustee, on or before May 1 of each 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

-50-

compliance with all conditions and covenants under this Indenture. For purposes of this paragraph, such compliance shall be determined without regard to any period of grace or requirement of notice provided under this Indenture. Such certificate need not comply with Section 102.

ARTICLE EIGHT

CONSOLIDATION, MERGER, LEASE, SALE OR TRANSFER

SECTION 801. WHEN COMPANY MAY MERGE, ETC.

The Company shall not consolidate with, or merge with or into any other corporation (whether or not the Company shall be the surviving corporation), or sell, assign, transfer or lease all or substantially all of its properties and assets as an entirety or substantially as an entirety to any Person or group of affiliated Persons, in one transaction or a series of related transactions, unless:

(1) either the Company shall be the continuing Person or the Person (if other than the Company) formed by such consolidation or with which or into which the Company is merged or the Person (or group of affiliated Persons) to which all or substantially all the properties and assets of the Company as an entirety or substantially as an entirety are sold, assigned, transferred or leased shall be a corporation (or constitute corporations) organized and existing under the laws of the United States of America or any State thereof or the District of Columbia and shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all the obligations of the Company under the Securities and this Indenture; and

(2) immediately before and after giving effect to such transaction or series of related transactions, no Event of Default, and no Default, shall have occurred and be continuing.

SECTION 802. OPINION OF COUNSEL.

The Company shall deliver to the Trustee prior to the proposed transaction(s) covered by Section 801 an Officer's Certificate and an Opinion of Counsel stating that the transaction(s) and such supplemental indenture comply with this Indenture and that all conditions precedent to the consummation of the transaction(s) under this Indenture have been met.

-51-

SECTION 803. SUCCESSOR CORPORATION SUBSTITUTED.

Upon any consolidation by the Company with or merger by the Company into any other corporation or any lease, sale, assignment, or transfer of all or substantially all of the property and assets of the Company in accordance with Section 801, the successor corporation formed by such consolidation or into which the Company is merged or the successor corporation or affiliated group of corporations to which such lease, sale, assignment, 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 corporation or corporations had been named as the Company herein, and thereafter, except in the case of a lease, the predecessor corporation or corporations shall be relieved of all obligations and covenants under this Indenture and the Securities and in the event of such conveyance or transfer, except in the case of a lease, any such predecessor corporation may be dissolved and liquidated.

ARTICLE NINE

SUPPLEMENTAL INDENTURES

SECTION 901. SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

Without notice to or the consent of any Holders, the Company, when authorized by 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 corporation to the Company and the assumption by any such successor of the covenants of the Company herein and in the Securities; or

(2) to add to the covenants of the Company for the benefit of the Holders of all or one or more specified series of Securities or one or more specified Tranches thereof (and if such covenants are to be for the benefit of fewer than all series of Securities or fewer than all Securities of a Series, stating that such covenants are expressly being included solely for the benefit of such series or one or more Tranches of such series) or to surrender any right or power herein conferred upon the Company; or

(3) to add any additional Events of Default with respect to all or one or more series of Securities; or

-52-

(4) to add or change any of the provisions of this Indenture to such extent as shall be necessary to permit or facilitate the issuance of Securities in bearer form, registrable or not registrable as to principal, and with or without interest coupons; 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; or

(7) to establish the form or terms of Securities of any series as permitted by Sections 201 and 301; 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, pursuant to the requirements of Section 611(b); or

(9) to cure any ambiguity, defect or inconsistency or to correct or supplement any provision herein which may be defective or inconsistent with any other provision herein; or

(10) to make any change to the provisions hereof or to add other provisions with respect to matters or questions arising under this Indenture; provided that such changes or additions shall not materially adversely affect the interests of the Holders of Securities of any series.

Without limiting the generality of the foregoing, if the Trust Indenture Act as in effect at the date of the original execution and delivery of this Indenture or at any time thereafter shall be amended and

(x) if any such amendment shall require one or more changes to any provisions hereof or the inclusion herein of any additional provisions, or shall by operation of law be deemed to effect such changes or incorporate such provisions by reference or otherwise this Indenture shall be deemed to have been amended so as to conform to such amendment to the Trust Indenture Act, and the Company and the Trustee may, without the consent of any Holders, enter into an indenture supplemental hereto to evidence such amendment hereof; or

-53-

(y) if any such amendment shall permit one or more changes to, or the elimination of, any provisions hereof which, at the date of the original execution and delivery hereof or at any time thereafter, are required by the Trust Indenture Act to be contained herein or are contained herein to reflect any provisions of the Trust Indenture Act as in effect at such date, this Indenture shall be deemed to have been amended to effect such changes or elimination, and the Company and the Trustee may, without the consent of any Holders, enter into an indenture supplemental hereto to evidence such amendment hereof.

Upon request of the Company, accompanied by a Board Resolution authorizing the execution of any such supplemental indenture, and upon receipt by the Trustee of the documents described in (and subject to the last sentence of) Section 903, the Trustee shall join with the Company in the execution of any supplemental indenture authorized or permitted by the terms of this Indenture.

SECTION 902. SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

Subject to the provisions of Section 901, with the consent of the Holders of not less than a majority in aggregate principal amount of the Securities of all series then Outstanding under this Indenture, considered as one class, by Act of said Holders delivered to the Company and the Trustee, the Company 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; provided, however, that if there shall be Securities of more than one series Outstanding hereunder and if a proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but fewer than all, of such series, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series so directly affected, considered as one class, shall be required; and provided, further, that if the Securities of any series shall have been issued in more than one Tranche and if the proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but fewer than all, of such Tranches, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all Tranches so directly affected, considered as one class, shall be required; and provided, further, that no such supplemental indenture shall without the consent of each Holder affected thereby:

(1) change the Stated Maturity of the principal of, or any installment of principal of or interest on, any Security, or reduce the principal amount thereof or the rate of interest thereon or any premium payable upon the redemption thereof or extend the time for payment thereof,

-54-

or reduce the amount of the principal of an Original Issue Discount Security that would be due and payable upon a declaration of acceleration of the Maturity thereof pursuant to Section 502, or change any Place of Payment where, or the coin or currency in which, the principal of any Security or any premium or interest 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, on or after the Redemption Date);

(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 of compliance with certain provisions of this Indenture or Defaults or Events of Default hereunder and their consequences provided for in this Indenture; or

(3) change the redemption provisions (including Article Eleven) hereof in a manner adverse to such Holder; or

(4) modify any of the provisions of this Section or Section 513, 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; provided, however, that this clause shall not be deemed to require the consent of any Holder with respect to changes in the references to "the Trustee" and concomitant changes in this Section, or the deletion of this proviso, in accordance with the requirements of Sections 611(b) and 901(8).

A supplemental indenture which changes or eliminates any covenant or other provisions of this Indenture which has expressly been included solely for the benefit of one or more particular series of Securities or one or more Tranches thereof, or which modifies the rights of the Holders of Securities of such series, or any Tranche thereof, 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 or Tranche.

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.

SECTION 903. EXECUTION OF SUPPLEMENTAL INDENTURES.

The Trustee shall sign any supplemental indenture authorized pursuant to this Article, subject to the last sentence of this Section 903. In executing, or accepting the additional trusts created by, any supplemental indenture permitted by this

-55-

Article or the modifications thereby of the trusts created by this Indenture, the Trustee shall be entitled to receive, and (subject to Section 601) shall be fully protected in relying upon, an Officer's Certificate and 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 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 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. PAYMENTS OF SECURITIES.

The Company will duly and punctually pay the principal of (and premium, if any) and interest, if any, on the Securities of each series in accordance with the terms of such Securities and this Indenture, and will duly comply with all the other terms, agreements and conditions contained in, or made in the Indenture for the benefit of, the Securities of such series or any Tranche thereof.

-56-

SECTION 1002. MAINTENANCE OF OFFICE OR AGENCY.

The Company will maintain an office or agency in each Place of Payment where Securities of each series, or any Tranche thereof, may be surrendered for registration of transfer or exchange or for presentation for payment, and where notices and demands to or upon the Company in respect of such Securities and this Indenture may be served. The Company will give prompt written notice to the Trustee of the location, and any change in location, of 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 address of the Trustee as set forth in Section 105 hereof.

The Company may also from time to time designate one or more other offices or agencies where the Securities of one or more series, or any Tranche thereof, may be presented or surrendered for any or all such purposes and may from time to time rescind such designations. 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.

The Company hereby initially designates the office of The Bank of New York as such office of the Company.

SECTION 1003. CORPORATE EXISTENCE.

Subject to Article 8 hereof, the Company will do or cause to be done all things necessary to preserve and keep in full force and effect its corporate existence.

SECTION 1004. PAYMENT OF TAXES AND OTHER CLAIMS.

The Company will pay or discharge, or cause to be paid or discharged, before the same shall become delinquent, (1) all material taxes, assessments and governmental charges levied or imposed upon the Company or upon the income, profits or property of the Company, and (2) all lawful claims for labor, materials and supplies which, if unpaid, might by law become a material lien upon the property of the Company; provided, however, that the Company shall not be required to pay or discharge or cause to be paid or discharged any such tax, assessment, charge or claim whose amount, applicability or validity is being contested in good faith by appropriate proceedings.

SECTION 1005. COMPLIANCE CERTIFICATES.

(a) The Company shall deliver to the Trustee within 90 days after the end of each fiscal year of the Company (which fiscal year currently ends on December 31), an Officer's Certificate signed by the principal executive,

-57-

financial or accounting officer of the Company stating whether or not the signer knows of any Default or Event of Default by the Company that occurred prior to the end of the fiscal year and is then continuing. If the signer does know of such a Default or Event of Default, the certificate shall describe each such Default or Event of Default and its status and the specific section or sections of this Indenture in connection with which such Default or Event of Default has occurred. The Company shall also promptly notify the Trustee in writing should the Company's fiscal year be changed so that the end thereof is on any date other than the date on which the Company's fiscal year currently ends. The certificate need not comply with Section 102 hereof.

(b) The Company shall deliver to the Trustee forthwith upon becoming aware of a Default or Event of Default (but in no event later than 10 days after the occurrence of each Default or Event of Default that is continuing), an Officer's Certificate setting forth the details of such Default or Event of Default and the action that the Company proposes to take with respect thereto and the specific section or sections of this Indenture in connection with which such Default or Event of Default has occurred.

SECTION 1006. COMMISSION REPORTS.

(a) The Company shall file with the Trustee, within 30 days after it files them with the Commission, copies of the quarterly and annual reports and of the information, documents, and other reports (or copies of such portions of any of the foregoing as the Commission may by rules and regulations prescribe) which the Company is required to file with the Commission pursuant to Section 13 or 15(d) of the Exchange Act. If the Company is not subject to the requirement of such
Section 13 or 15(d) of the Exchange Act, the Company shall file with the Trustee, within 30 days after it would have been required to file such information with the Commission, financial statements, including any notes thereto and, with respect to annual reports, an auditors' report by an accounting firm of established national reputation and a "Management's Discussion and Analysis of Financial Condition and Results of Operations," both comparable to that which the Company would have been required to include in such annual reports, information, documents or other reports if the Company had been subject to the requirements of such Sections 13 or 15(d) of the Exchange Act. The Company also shall comply with the other provisions of Section 314(a) of the Trust Indenture Act.

(b) So long as the Securities remain outstanding, the Company shall cause its annual report to stockholders and any other financial reports furnished by it to stockholders

-58-

generally, to be mailed to the Holders at their addresses appearing in the register of Securities maintained by the Security Registrar in each case at the time of such mailing or furnishing to stockholders. If the Company is not required to furnish annual or quarterly reports to its stockholders pursuant to the Exchange Act, the Company shall cause its financial statements, including any notes thereto and, with respect to annual reports, an auditors' report by an accounting firm of established national reputation and a "Management's Discussion and Analysis of Financial Condition and Results of Operations," to be so filed with the Trustee and mailed to the Holders within 90 days after the end of each of the Company's fiscal years and within 45 days after the end of each of the first three quarters of each fiscal year.

(c) The Company shall provide the Trustee with a sufficient number of copies of all reports and other documents and information that the Company may be required to deliver to the Holders under this
Section 1007.

SECTION 1007. WAIVER OF STAY, EXTENSION OR USURY LAWS.

The Company 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, and will actively resist any and all efforts to be compelled to take the benefit or advantage of, any stay or extension law or any usury law or other law, which would prohibit or forgive the Company from paying all or any portion of the principal of and/or interest, if any, on the Securities as contemplated herein, wherever enacted, now or at any time hereafter in force, or which may affect the covenants or the performance of this Indenture; and (to the extent that it may lawfully do so) the Company 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.

SECTION 1008. MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST.

If the Company shall at any time act as its own Paying Agent with respect to any series of Securities, or any Tranche thereof, it will, on or before each due date of the principal of (and premium, if any) or interest, if any, on any of the Securities of that series, or any Tranche thereof, segregate and hold in trust for the benefit of the Persons entitled thereto a sum sufficient to pay the principal (and premium, if any) or interest, if any, 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.

-59-

Whenever the Company shall have one or more Paying Agents for any series of Securities, or any Tranche thereof, it will, prior to each due date of the principal of (and premium, if any) or interest, if any, on any Securities of that series, or any Tranche thereof, deposit with a Paying Agent a sum sufficient to pay the principal (and premium, if any) or interest so becoming due, such sum to be held in trust for the benefit of the Persons entitled to such principal, premium or interest, if any, and (unless such Paying Agent is the Trustee) the Company will promptly notify the Trustee of its action or failure to so act.

The Company will cause each Paying Agent for any series of Securities, or any Tranche thereof (other than the Trustee) to execute and deliver to the Trustee an instrument in which such Paying Agent shall agree with the Trustee, subject to the provisions of this Section, that such Paying Agent will:

(1) hold all sums held by it for the payment of the principal of (and premium, if any) or interest, if any, on Securities of that series, or any Tranche thereof, in trust for the benefit of the Persons entitled thereto until such sums shall be paid to such Persons or otherwise disposed of as herein provided;

(2) give the Trustee notice of any default by the Company (or any other obligor upon the Securities of that series, or any Tranche thereof) in the making of any payment of principal (and premium, if any) or interest, if any, on the Securities of that series, or any Tranche thereof; and

(3) at any time during the continuance of any such default, upon the written request of the Trustee, forthwith pay to the Trustee all sums so held in trust by such Paying Agent.

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 money.

Any money deposited with the Trustee or any Paying Agent, or then held by the Company, in trust for the payment of the principal of (and premium, if any) or interest, if any, on any Security of any series and remaining unclaimed for two years after such principal (and premium, if any) or interest, if any, has become due and payable shall be paid to the Company on Company Request, or (if then held by the Company) shall be discharged from such trust; and the Holder of such Security shall thereafter, as an unsecured general creditor, look only to the

-60-

Company for payment thereof, and all liability of the Trustee or such Paying Agent with respect to such trust money, and all liability of the Company as trustee thereof, shall thereupon cease; provided, however, that the Trustee of such Paying Agent, before being required to make any such repayment, may at the expense of the Company cause to be published once, in a newspaper published in the English language, customarily published on each Business Day and of general circulation in New York, New York, notice that such money remains unclaimed and that, after a date specified therein, which shall not 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.

ARTICLE ELEVEN

REDEMPTION OF SECURITIES

SECTION 1101. APPLICABILITY OF ARTICLE.

Securities of any series, or any Tranche thereof, 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, or any Tranche thereof) in accordance with this Article.

SECTION 1102. ELECTION TO REDEEM; NOTICE TO TRUSTEE.

The election of the Company to redeem any Securities shall be evidenced by a Board Resolution. In case of any redemption at the election of the Company of any series, or any Tranche thereof, the Company shall, at least 45 days prior to the Redemption Date fixed by the Company (unless a shorter notice shall be satisfactory to the Trustee), notify the Trustee of such Redemption Date and of the principal amount of Securities 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 Officer's Certificate evidencing compliance with such restriction.

SECTION 1103. SELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED.

If fewer than all the Securities of any series, or any Tranche thereof, are to be redeemed, and if at the time the Company shall have given notice of redemption to the Trustee in accordance with Section 1102, there shall not be on file with the Trustee and in effect a Holders' Redemption Agreement, as hereinafter defined and the particular Securities to be redeemed shall be selected by the Trustee, from the Outstanding Securities of such series or Tranche not previously called for redemption, substantially pro rata, by lot or by any other method as the Trustee considers fair and appropriate and that complies with the

-61-

requirements of the principal national securities exchange, if any, on which such Securities are listed, and which may provide for the selection for redemption of portions (equal to the minimum authorized denomination for Securities of that series or Tranche or any integral multiple thereof) of the principal amount of Securities of such series or Tranche of a denomination larger than the minimum authorized denomination for Securities of that series or Tranche; provided that in case the Securities of such series or Tranche have different terms and maturities, the Securities to be redeemed shall be selected by the Company and the Company shall give notice thereof to the Trustee; provided however, that if, as indicated in an Officer's Certificate, the Company shall have offered to purchase all or any principal amount of the Securities then Outstanding of any series, or any Tranche thereof, and fewer than all of such Securities as to which such offer was made shall have been tendered to the Company for such purchase, the Trustee, if so directed by Company Order, shall select for redemption all or any principal amount of such Securities which have not been so tendered.

If at the time the Company shall have given notice of redemption to the Trustee in accordance with Section 1102, there shall be on file with the Trustee and in effect a Holders' Redemption Agreement, as hereinafter defined, then the Trustee shall select, in accordance with the provisions of said Holders' Redemption Agreement, the Securities or parts thereof to be redeemed.

For the purposes of this Indenture, the term "Holders' Redemption Agreement" shall mean an agreement, reasonably satisfactory to the Trustee, executed as provided in this Section, which provides for the method to be followed by the Trustee in selecting Securities or parts of Securities for redemption out of any funds held by the Trustee to be applied to such redemption. A Holders' Redemption Agreement may be made with respect to a single series of Securities, or Tranche thereof, in which case it shall be executed by or on behalf of the Holders of all Outstanding Securities of such series or Tranche, or it may be made with respect to all Outstanding Securities, in which case it shall be executed by or on behalf of the Holders of all Securities Outstanding hereunder.

The Trustee shall promptly notify the Company and the Securities Registrar 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 the Securities shall relate, in the case of any Securities redeemed or to be redeemed only in part, to the portion of the principal amount of such Securities which has been or is to be redeemed.

-62-

SECTION 1104. NOTICE OF REDEMPTION.

Notice of redemption shall be given by first-class mail, postage prepaid, mailed at least 30 days prior to the Redemption Date, to each Holder of Securities to be redeemed, at his address appearing in the Security Register.

All notices of redemption shall state:

(1) the Redemption Date;

(2) the Redemption Price;

(3) if fewer than all the Outstanding Securities of any series or Tranche are to be redeemed, the identification (and, in the case of partial redemption, the principal amounts) of the particular Securities to be redeemed;

(4) that on the Redemption Date the Redemption Price will be come due and payable upon each such Security to be redeemed and, if applicable, that interest thereon, if any, will cease to accrue on and after said date;

(5) the place or places where such Securities are to be surrendered for payment of the Redemption Price;

(6) that the redemption is for a sinking or other fund, if such is the case;

(7) the CUSIP number, if any, of the Securities to be redeemed; and

(8) unless otherwise provided as to a particular series of Securities or any Tranche thereof, if at the time of publication or mailing of any notice of redemption the Company shall not have deposited with the Trustee or Paying Agent and/or irrevocably directed the Trustee or Paying Agent to apply, from money held by it available to be used for the redemption of Securities, an amount in cash sufficient to redeem all of the Securities called for redemption, including accrued interest, if any, to the Redemption Date, such notice shall state that it is subject to the receipt of the redemption moneys by the Trustee or Paying Agent before the Redemption Date (unless such redemption is mandatory) and such notice shall be of no effect unless such moneys are so received before such date.

Notice of redemption of Securities to be redeemed at the election of the Company 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. Notice of mandatory redemption of Securities shall be given by the Trustee in the name and at the expense of the Company.

-63-

SECTION 1105. DEPOSIT OF REDEMPTION PRICE.

Prior to 10:00 a.m., New York Time, on 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, segregate and hold in trust as provided in Section 1009) an amount of money sufficient to pay the Redemption Price of, and (except if the Redemption Date shall be an Interest Payment Date) accrued interest, if any, on, all the Securities which are to be redeemed on that date.

SECTION 1106. SECURITIES PAYABLE ON REDEMPTION DATE.

Notice of redemption having been given as aforesaid, and the Company having on or before the Redemption Date deposited with the Trustee (and/or having irrevocably directed the Trustee to apply, from money held by it available to be used for the redemption of Securities) an amount in cash sufficient to redeem all of the Securities to be redeemed, the Securities so to be redeemed shall, on the Redemption Date, become due and payable at the Redemption Price therein specified, and from and after such date such Securities shall cease to bear interest. Upon surrender of any such Security for redemption in accordance with said notice, 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 whose Stated Maturity is on or prior to 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 Regular or Special Record Dates according to their terms and the provisions of Section 307.

If any Security called for redemption shall not be so paid upon surrender thereof for redemption, the principal (and premium, if any) shall, until paid, bear interest from the Redemption Date at the rate, if any, prescribed therefor in the Security.

SECTION 1107. SECURITIES REDEEMED IN PART.

Any Security which is to be redeemed only in part shall be surrendered at an office or agency of the Company 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 and Tranche and Stated Maturity, 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.

-64-

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 or any Tranche thereof, except as otherwise specified as contemplated by Section 301 for Securities of such series, or Tranche.

The minimum amount of any sinking fund payment provided for by the terms of Securities of any series, or any Tranche thereof, 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 Securities of any series, or any Tranche thereof, is herein referred to as an "OPTIONAL SINKING FUND PAYMENT". If provided for by the terms of Securities of any series, or any Tranche thereof, the cash amount of any 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, or any Tranche thereof, as provided for by the terms of Securities of such series, or any Tranche thereof.

SECTION 1202. SATISFACTION OF SINKING FUND PAYMENTS WITH SECURITIES.

The Company (1) may deliver Securities of a series, or Tranche (other than any Securities previously called for redemption) and (2) may apply as a credit Securities of a series or Tranche 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, in each case in satisfaction of all or any part of any sinking fund payment with respect to the Securities of such series or Tranche required to be made pursuant to the terms of such Securities as provided for by the terms of such series or Tranche thereof; PROVIDED that such Securities have not been previously so credited. Such Securities shall be received and credited for such purpose by the Trustee at the Redemption Price specified in such Securities for redemption through operation of the sinking fund and the amount of such sinking fund payment shall be reduced accordingly.

SECTION 1203. REDEMPTION OF SECURITIES FOR SINKING FUND.

Not fewer than 45 days prior to each sinking fund payment date for any series of Securities or any Tranche thereof, the Company will deliver to the Trustee an Officer's Certificate specifying the amount of the next ensuing sinking fund payment for that series or Tranche pursuant to the terms of that series or Tranche, the portion thereof, if any, which is to be satisfied

-65-

by payment of cash and the portion thereof, if any, which is to be satisfied by delivering and crediting Securities of that series or Tranche pursuant to
Section 1202 and will also deliver to the Trustee any Securities to be so delivered. 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

DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1301. APPLICABILITY OF ARTICLE; COMPANY'S OPTION TO EFFECT DEFEASANCE OR COVENANT DEFEASANCE.

Unless pursuant to Section 301 provision is made for the inapplicability of either or both of (a) Defeasance of the Securities of a series, or any Tranche thereof, under Section 1302 or (b) Covenant Defeasance of the Securities of a series, or any Tranche thereof, under Section 1303, then the provisions of such Section or Sections, as the case may be, together with the other provisions of this Article, shall be applicable to the Securities of such series or Tranche, and the Company may at its option by Board Resolution, at any time, with respect to the Securities of such series, or Tranche, elect to have either Section 1302 (unless inapplicable) or Section 1303 (unless inapplicable) be applied to the Outstanding Securities of such series or Tranche upon compliance with the applicable conditions set forth below in this Article.

SECTION 1302. DEFEASANCE AND DISCHARGE.

Upon the Company's exercise of the option provided in Section 1301 to defease the Outstanding Securities of a particular series or Tranche, the Company shall be discharged from its obligations with respect to the Outstanding Securities of such series or Tranche on the date the applicable conditions set forth in Section 1304 are satisfied (hereinafter, "DEFEASANCE"). Defeasance shall mean that the Company shall be deemed to have paid and discharged the entire indebtedness represented by the Outstanding Securities of such series or Tranche and to have satisfied all its other obligations under such Securities and this Indenture insofar as such Securities are concerned (and the Trustee, at the expense of the Company, shall execute proper instruments acknowledging the same); provided, however, that the following rights, obligations, powers, trusts, duties and immunities shall survive until otherwise terminated or discharged hereunder: (A) the rights of Holders of Outstanding

-66-

Securities of such series or Tranche to receive, solely from the trust fund provided for in Section 1304, payments in respect of the principal of (and premium, if any) and interest, if any, on such Securities when such payments are due, (B) the Company's obligations with respect to such Securities under Sections 304, 305, 306, 1002 and 1008, (c) the rights, powers, trusts, duties and immunities of the Trustee hereunder and (D) this Article. Subject to compliance with this Article, the Company may exercise its option with respect to Defeasance under this Section 1302 notwithstanding the prior exercise of its option with respect to Covenant Defeasance under Section 1303 in regard to the Securities of such series or Tranche.

SECTION 1303. COVENANT DEFEASANCE.

Upon the Company's exercise of the option provided in Section 1301 to obtain a Covenant Defeasance with respect to the Outstanding Securities of a particular series, or Tranche thereof, the Company shall be released from its obligations under this Indenture (except its obligations under Sections 304, 305, 306, 506, 509, 610, 1001, 1002, 1006, 1007 and 1008) with respect to the Outstanding Securities of such series, or Tranche thereof, on and after the date the applicable conditions set forth in Section 1304 are satisfied (hereinafter, "COVENANT DEFEASANCE"). Covenant Defeasance shall mean that, with respect to the Outstanding Securities of such series, or Tranche thereof, the Company may omit to comply with and shall have no liability in respect of any term, condition or limitation set forth in this Indenture (except its obligations under Sections 304, 305, 306, 506, 509, 610, 1001, 1002, 1005, 1007 and 1008), whether directly or indirectly by reason of any reference elsewhere herein or by reason of any reference to any other provision herein or in any other document, and such omission to comply shall not constitute an Event of Default under Section 501(3) with respect to Outstanding Securities of such series, and the remainder of this Indenture and of the Securities of such series or Tranche shall be unaffected thereby.

SECTION 1304. CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE.

The following shall be the conditions to Defeasance under
Section 1302 and Covenant Defeasance under Section 1303:

(1) the Company shall irrevocably have deposited or caused to be deposited with the Trustee (or another trustee satisfying the requirements of Section 609 who shall agree to comply with the provisions of this Article applicable to it), under the terms of an irrevocable trust agreement in form and substance reasonably satisfactory to such Trustee, 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, (A) Dollars in an amount, or (B) U.S.

-67-

Government Obligations which through the scheduled payment of principal and interest in respect thereof in accordance with their terms will provide, not later than the due date of any payment, money in an amount, or (c) a combination thereof, in each case sufficient, after payment of all federal, state and local taxes or other charges or assessments in respect thereof payable by the Trustee, in the opinion of a nationally recognized firm of independent public accountants 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, on) and each installment of principal of (and premium, if any) and interest, if any, on the Outstanding Securities of such series or Tranche 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 the Outstanding Securities of such series or Tranche on the day on which such payments are due and payable in accordance with the terms of this Indenture and of such Securities.

(2) No Default or Event of Default with respect to the Securities of such series shall have occurred and be continuing on the date of such deposit or shall occur as a result of such deposit, and no Default or Event of Default under clause (4) or (5) of Section 501 hereof shall occur and be continuing, 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).

(3) Such deposit, Defeasance or Covenant Defeasance shall not result in a breach or violation of, or constitute a default under, any other agreement or instrument to which the Company is a party or by which it is bound.

(4) Such Defeasance or Covenant Defeasance shall not cause any Securities of such series, or Tranche thereof, then listed on any national securities exchange registered under the Exchange Act to be delisted.

(5) In the case of an election with respect to
Section 1302, the Company shall have delivered to the Trustee either (A) a ruling directed to the Trustee received from the Internal Revenue Service to the effect that the Holders of the Outstanding Securities of such series, or Tranche thereof, will not recognize income, gain or loss for federal income tax purposes as

-68-

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 or (B) an Opinion of Counsel, based on such ruling or on a change in the applicable federal income tax law since the date of this Indenture, in either case to the effect that, and based thereon such opinion shall confirm that, the Holders of the Outstanding Securities of such series, or Tranche thereof, 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.

(6) In the case of an election with respect to
Section 1303, the Company shall have delivered to the Trustee an Opinion of Counsel or a ruling directed to the Trustee received from the Internal Revenue Service to the effect that the Holders of the Outstanding Securities of such series or Tranche thereof 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.

(7) Such Defeasance or Covenant Defeasance shall be effected in compliance with any additional terms, conditions or limitations which may be imposed on the Company in connection therewith pursuant to Section 301.

(8) The Company shall have delivered to the Trustee an Officer's Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for relating to either the Defeasance under Section 1302 or the Covenant Defeasance under Section 1303 (as the case may be) have been complied with.

SECTION 1305. DEPOSITED MONEY AND GOVERNMENT OBLIGATIONS TO BE HELD IN TRUST.

Subject to the provisions of the last paragraph of Section 1008, all money and Government Obligations (including the proceeds thereof) deposited with the Trustee (or other qualifying trustee--collectively for purposes of this Section 1305, the "Trustee") pursuant to Section 1304 in respect of the Outstanding Securities of a particular series, or Tranche, shall be held in trust and applied by the Trustee, in accordance with the provisions of such Securities and this Indenture, to the payment,

-69-

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 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.

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 1304 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 the Outstanding Securities of such series or Tranche.

Anything in this Article to the contrary notwithstanding, the Trustee shall deliver to pay to the Company from time to time upon Company Request any money or Government Obligations held by it as provided in Section 1304 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 thereof which would then be required to be deposited for the purpose for which such money or Government Obligations were deposited.

ARTICLE FOURTEEN

MISCELLANEOUS

SECTION 1401. MISCELLANEOUS.

This instrument 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 instrument.

-70-

IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, all as of the day and year first above written.

PUBLIC SERVICE COMPANY
OF COLORADO

By  /s/ Richard C.  Kelly
  -------------------------------
  Richard C.  Kelly
  Executive Vice President

THE BANK OF NEW YORK,
as Trustee

By  /s/ Walter N.  Gitlin
  -------------------------------
  Walter N.  Gitlin
  Vice President

-71-

Exhibit 4.2



PUBLIC SERVICE COMPANY
OF COLORADO

TO

THE BANK OF NEW YORK,

AS TRUSTEE


FIRST SUPPLEMENTAL INDENTURE

Dated as of July 15, 1999

Supplementing the Indenture
dated as of July 1, 1999


Establishing the Securities of Series A Senior Notes 6 7/8% due 2009




THIS FIRST SUPPLEMENTAL INDENTURE, dated as of July 15, 1999, is between PUBLIC SERVICE COMPANY OF COLORADO, a Colorado corporation (hereinafter called the "Issuer" or the "Company"), having its principal office at 1225 17th Street, Denver, Colorado 80202, and THE BANK OF NEW YORK, as Trustee (hereinafter called the "Trustee"), having its principal corporate trust office at 101 Barclay Street, Floor 21 West, New York, New York 10286.

RECITALS OF THE ISSUER

The Issuer has heretofore executed and delivered an Indenture, dated as of July 1, 1999 (the "Original Indenture", the Original Indenture, as supplemented by this supplemental indenture being hereinafter referred to as the "Indenture"), relating to the issuance at any time or from time to time of its Securities on terms to be specified at the time of issuance. As of the date hereof, no Securities have been issued under the Indenture. Terms used and not otherwise defined herein shall (unless the context otherwise clearly requires) have the respective meanings given to them in the Original Indenture.

The Original Indenture provides in Article Three thereof that, prior to the issuance of Securities of any series, the form of such Securities and the terms applicable to such series shall be established in, or pursuant to, the authority granted in a resolution of the Board of Directors or established in one or more indentures supplemental thereto.

The Issuer desires by this supplemental indenture, among other things, to establish the form of the Securities of a series, to be titled Series A Senior Notes 6 7/8% due 2009 of the Issuer, and to establish the terms applicable to such series, pursuant to Sections 201, 301 and 901 of the Original Indenture. The Issuer has duly authorized the execution and delivery of this supplemental indenture.

Article Nine of the Original Indenture provides that the Issuer, when authorized by a resolution of its Board of Directors, and the Trustee may from time to time and at any time amend the Indenture without the consent of Securityholders for certain purposes enumerated in Section 901 thereof, including the purposes set forth in subsection (7) of said Section 901.

The execution and delivery of this supplemental indenture by the parties hereto are in all respects authorized by the provisions of the Indenture.

All things necessary have been done to make this supplemental indenture a valid agreement of the Issuer, in accordance with its terms.


NOW, THEREFORE, THIS FIRST SUPPLEMENTAL INDENTURE WITNESSETH:

For and in consideration of the premises, it is mutually covenanted and agreed, as follows:

ARTICLE ONE

ESTABLISHMENT OF SERIES A SENIOR NOTES 6 7/8% DUE 2009

Section 1.01. The title of the series of the Securities established by this supplemental indenture shall be Series A Senior Notes 6 7/8 % due 2009 of the Issuer (hereinafter called the "Series A Notes").

Section 1.02. The Series A Notes shall be limited to $200,000,000 in aggregate principal amount.

Section 1.03. The Series A Notes may be issued in whole or in part as one or more Global Securities and The Depository Trust Company, or a nominee thereof, shall be the Depository for such Global Security or Global Securities. The Depository for such Global Security or Global Securities representing Series A Notes may surrender one or more Global Securities representing Series A Notes in exchange in whole or in part for individual Series A Notes on such terms as are acceptable to the Issuer and such Depository and otherwise subject to the terms of the Indenture.

Section 1.04. The principal of the Series A Notes shall be payable on July 15, 2009.

Section 1.05. The Series A Notes shall bear interest at the rate of 6 7/8% per annum and shall accrue from July 16, 1999. The Interest Payment Dates shall be January 15 and July 15 in each year, commencing January 15, 2000. The Regular Record Dates in respect of such Interest Payment Dates shall be January 1 and July 1 in each year, respectively.

Section 1.06. The Corporate Trust Office of The Bank of New York shall be the place at which the principal of the Series A Notes shall be payable. Any interest thereon shall be paid as specified in Section 307 of the Original Indenture.

Section 1.07. The Series A Notes are subject to redemption upon not less than 30 days' notice by first class mail, in whole at any time or in part from time to time at the option of the Company at a redemption price equal to the greater of (i) 100% of the principal amount hereof to be redeemed or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date on a semiannual basis (assuming a 360 day year consisting of

-2-

twelve 30-day months) at the Treasury Yield plus 15 basis points, plus in each case accrued and unpaid interest to the redemption date.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such 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 hereof 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 hereof. "Independent Investment Banker" means Merrill Lynch, Pierce, Fenner & Smith Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, one of the remaining Reference Treasury Dealers appointed by the Trustee after consultation with the Company.

"Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such Redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations for such redemption date, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any Redemption date, the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Company by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date.

"Reference Treasury Dealer" means (i) any primary U.S. Government securities dealer in New York City (a "Primary Treasury Dealer") designated by the Company.

In the event of redemption of the Series A Notes in part only, a new Series A Note or Notes of the same series for

-3-

the unredeemed portion thereof will be issued in the name of the Holder thereof upon the cancellation hereof.

Section 1.08. Notice of redemption will be mailed at least 30 days before the redemption date to the Holder thereof at his address appearing on the Security Register. A notice of redemption shall provide that it is subject to the occurrence of any event before the date fixed for such redemption as described in such notice ("Conditional Redemption") and such notice of Conditional Redemption shall be of no effect unless all such conditions to the redemption have occurred before such date or have been waived by the Company.

Section 1.09. The Series A Notes shall be issued in denominations of $1000 and any integral multiple thereof.

Section 1.10. Sections 1301 and 1302 of the Indenture shall be applicable to the Series A Notes.

Section 1.11. The Issuer hereby appoints, or confirms the appointment of, The Bank of New York as the initial Trustee, Securities Registrar and Paying Agent, subject to the provisions of the Indenture with respect to resignation, removal and succession, and subject, further, to the right of the Issuer to appoint additional agents (including Paying Agents).

Section 1.12. The Series A Notes shall be substantially in the form set forth in EXHIBIT A hereto, and shall have such further terms as are reflected in such form, subject to changes in the form thereof made by the Issuer and acceptable to the Trustee.

ARTICLE TWO

MISCELLANEOUS

Section 2.01. The recitals contained herein shall be taken as the statements of the Issuer, and the Trustee assumes no responsibility for the correctness of the same. The Trustee makes no representation as to the validity of this supplemental indenture. The Indenture, as supplemented by this supplemental indenture, is in all respects hereby adopted, ratified and confirmed.

Section 2.02. This supplemental indenture may be executed in any number of counterparts, and on separate counterparts, each of which shall be an original; but such counterparts shall together constitute but one and the same instrument.

-4-

Section 2.03. If any provision of this supplemental indenture limits, qualifies or conflicts with the duties imposed by any of Sections 310 to 317, inclusive, of the Trust Indenture Act of 1939, as amended by the Trust Indenture Reform Act of 1990, through operation of Section 318(c), such imposed duties shall control.

Section 2.04. The Article headings herein are for convenience only and shall not affect the interpretation hereof.

-5-

IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental Indenture to be duly executed as of the 15th day of July, 1999.

PUBLIC SERVICE COMPANY OF COLORADO

By:   /s/ Richard C. Kelly
    --------------------------
      Richard C. Kelly
      Executive Vice President

THE BANK OF NEW YORK

By:   /s/ Walter N. Gitlin
    --------------------------
      Authorized Signatory

-6-

EXHIBIT A

Form of Series A Senior Note 6 7/8% due 2009

THIS SECURITY IS A GLOBAL SECURITY REGISTERED IN THE NAME OF THE DEPOSITORY (REFERRED TO HEREIN) OR A NOMINEE THEREOF AND UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR THE INDIVIDUAL SECURITIES REPRESENTED HEREBY, THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITORY TO A NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY OR ANOTHER NOMINEE OF THE DEPOSITORY OR BY THE DEPOSITORY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITORY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITORY.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (55 WATER STREET, NEW YORK, NEW YORK), TO THE TRUSTEE FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

PUBLIC SERVICE COMPANY OF COLORADO
Series A Senior Note 6 7/8 % due 2009

                 Interest Rate:    6 7/8%
        Interest Payment Dates:    January 15 and July 15
          Regular Record Dates:    January 1 and July 1
Original Interest Accrual Date:    January 16,1999
               Stated Maturity:    July 15,2009


CUSIP No. ___________              Principal Amount
                                   $200,000,000

PUBLIC SERVICE COMPANY OF COLORADO, a corporation duly organized and existing under the laws of the State of Colorado (herein called the "Company", which term includes any successor

A-1

corporation under the Indenture referred to below) promises to pay to _____________________________________ or registered assigns the principal sum of Two Hundred Million Dollars on July 15, 2009, the Stated Maturity specified above.

1. Interest.

The Company promises to pay interest on the principal amount hereof at the Interest Rate per annum shown above from the Original Interest Accrual Date specified above, or from the most recent Interest Payment Date to which interest has been paid, semiannually in arrears, on the Interest Payment Dates specified above, in each year, commencing with the Interest Payment Date next succeeding the Original Interest Accrual Date specified above, until the principal hereof is paid or duly provided for. Interest will be computed on the basis of a 360-day year of twelve 30-day months.

2. Method of Payment.

The Company will pay interest so payable to the person who is the registered holder hereof at the close of business on the Regular Record Date for the next Interest Payment Date, except as otherwise provided in the Indenture and except that interest payable at Maturity will be paid to the person to whom principal is paid at Maturity. Payment of principal shall be made upon presentation hereof at the office of this Paying Agent. The Company will pay principal and interest in money of the United States that at the time of payment is legal tender for payment of public and private debts. The Company may pay principal and interest by check payable in such money. It may mail an interest check to the holder's registered address.

3. Agents.

Initially, The Bank of New York, 101 Barclay Street, Floor 21 West, New York, New York 10286 Attention: Corporate Trust Administration, will act as Paying Agent and Securities Registrar. The Company may change the Paying Agent to provide for more than one such agent. The Company may appoint one or more Security Registrars. The Company or any Affiliate may act in any such capacity. The Trustee may appoint one or more Authenticating Agents to authenticate the Securities.

4. Indenture.

The securities of this series (the "Securities") have been issued under an Indenture dated as of July 1, 1999

A-2

(the "Indenture") between the Company and The Bank of New York (the "Trustee," which term includes any successor trustee under the Indenture). The terms of the Securities include those stated in the Indenture and in the Supplemental Indenture creating the Securities and those made part of the Indenture by the Trust Indenture Act of 1939 (15 U.S. Code Sections 77aaa-77bbbb). Securityholders are referred to the Indenture, the Supplemental Indenture and the Trust Indenture Act of 1939, as amended, for a statement of such terms.

5. Redemption.

This Security is subject to redemption upon not less than 30 days' notice by first class mail, in whole at any time or in part from time to time at the option of the Company at a redemption price equal to the greater of (i) 100% of the principal amount hereof to be redeemed or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date on a semiannual basis (assuming a 360 day year consisting of twelve 30-day months) at the Treasury Yield plus 15 basis points, plus in each case accrued and unpaid interest to the redemption date.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such 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 hereof 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 hereof. "Independent Investment Banker" means Merrill Lynch, Pierce, Fenner & Smith Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, one of the remaining Reference Treasury Dealers appointed by the Trustee after consultation with the Company.

"Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such

A-3

Redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations for such redemption date, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any Redemption date, the average, as determined by the Company, of the bid and asked prices for the Comparable Treasury Issue
(expressed in each case as a percentage of its principal amount)
quoted in writing to the Company by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date.

"Reference Treasury Dealer" means (i) any primary U.S. Government securities dealer in New York City (a "Primary Treasury Dealer") designated by the Company.

In the event of redemption of this Security in part only, a new Security or Securities of this series for the unredeemed portion hereof will be issued in the name of the Holder hereof upon the cancellation hereof.

6. Notice of Redemption.

Notice of redemption will be mailed at least 30 days before the redemption date to the holder hereof at his address appearing on the Security Register.

A notice of redemption shall provide that it is subject to the occurrence of any event before the date fixed for such redemption as described in such notice ("Conditional Redemption") and such notice of Conditional Redemption shall be of no effect unless all such conditions to the redemption have occurred before such date or have been waived by the Company.

7. Denominations, Transfer, Exchange.

The Securities of this series are in registered form without coupons in denominations of $1000 and whole multiples of $1000. The transfer of this Security may be registered and this Security may be exchanged as provided in the Indenture. The Securities Registrar may require a holder, among other things, to furnish

A-4

appropriate endorsements and transfer documents and to pay any taxes and fees required by law or the Indenture. The Securities Registrar need not exchange or register the transfer of any Security of this series or portion thereof selected for redemption. Also, it need not exchange or register the transfer of any Security for a period of 15 days before the mailing of a notice of redemption of Securities of this series selected to be redeemed.

8. Persons Deemed Owners.

The registered holder of a Security may be treated as its owner for all purposes.

9. Amendments and Waivers.

Subject to certain exceptions, the Indenture may be amended with the consent of the holders of a majority in outstanding principal amount of the Securities. Subject to certain exceptions, a default under the Indenture may be waived with the consent of the holders of a majority in outstanding principal amount of the Securities.

Without the consent of any Securityholder, the Indenture may be amended, among other things, to cure any ambiguity, omission, defect or inconsistency; to provide for assumption of Company obligations to Securityholders; or to make any change that does not materially adversely affect the rights of any Securityholder.

10. Restrictive Covenants.

The Securities are unsecured general obligations of the Company limited to $200,000,000 principal amount. The Indenture does not limit the amount of debt the Company may issue thereunder or otherwise.

11. Successors.

When a successor assumes all the obligations of the Company under the Securities and the Indenture, the Company will be released from those obligations.

12. Defeasance Prior to Redemption or Maturity.

Subject to certain conditions, the Company at any time may terminate some or all of its obligations hereunder and the Indenture if the Company deposits with the Trustee money or U.S. Government Obligations for the payment of principal and interest hereon to redemption or maturity. U.S. Government Obligations are securities backed by the full faith and credit of the United States

A-5

of America or certificates representing an ownership interest in such Obligations.

13. Defaults and Remedies.

If an Event of Default occurs and is continuing, the Trustee or the holders of at least 25% in principal amount of the outstanding Securities may declare the principal of all such Securities to be due and payable immediately.

Securityholders may not enforce the Indenture or the Securities except as provided in the Indenture. The Trustee may require indemnity satisfactory to it before it enforces the Indenture or the Securities. Subject to certain limitations, holders of a majority in principal amount of the Securities may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Securityholders notice of any continuing default (except a default in payment) if it determines that withholding notice is in their interests. The Company must furnish annual compliance certificates to the Trustee.

14. Trustee Dealings with Company.

The Bank of New York, the Trustee under the Indenture, in its individual or any other capacity, may make loans to, accept deposits from, and perform services for the Company or its Affiliates, and may otherwise deal with the Company or its Affiliates, as if it were not Trustee.

15. No Recourse Against Others.

A director, officer, employee or stockholder, as such, of the Company shall not have any liability for any obligations of the Company under the Securities or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. Each Securityholder by accepting a Security waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Securities.

16. Authentication.

This Security shall not be valid for any purpose and shall not be entitled to any benefit under the Indenture until authenticated by a manual signature of the Trustee or any Authenticating Agent.

A-6

17. Abbreviations.

Customary abbreviations may be used in the name of a Securityholder or an assignee, such as: TEN COM (tenants in common), TEN ENT (tenants by the entireties), JT TEN (joint tenants with right of survivorship and not as tenants in common), CUST (custodian), and U/G/M/A (Uniform Gifts to Minors Act).

A-7

The Company will furnish to any Securityholder upon written request and without charge a copy of the Indenture, including the Supplemental Indenture which contains the text of this Security in larger type. Requests may be made to: Public Service Company of Colorado, 1225 17th Street, Denver, Colorado, 80202 attention: Corporate Secretary.

[Corporate Seal] PUBLIC SERVICE
COMPANY OF COLORADO

By: _______________________
name:
title:

Attest:

By:__________________
name:
title:

Authenticated:

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

Dated: July 16, 1999 By: ____________________________ Authorized Signatory

A-8

ASSIGNMENT FORM

To assign this Security, fill in the form below:

I or we assign and transfer this Security to:



(Insert assignee's social security or tax I.D. no.)




(Print or type assignee's name, address and zip code)

and irrevocably appoint __________________________________ agent to transfer this Security on the books of the Company. The agent may substitute another to act for him.

Date:_________________ Your Signature:___________________

(Sign exactly as your name appears on the other side of this Security)

A-9