Exhibit 4.1

UNITEDHEALTH GROUP INCORPORATED

to

U.S. BANK NATIONAL ASSOCIATION

as Trustee

INDENTURE

Dated as of February 4 , 2008

UNITEDHEALTH GROUP INCORPORATED

Reconciliation And tie between Trust Indenture Act of 1939 and

Indenture, dated as of February 4, 2008

CROSS-REFERENCE TABLE*

i

N.A. means not applicable.

Note: This reconciliation and tie shall not, for any purpose,

be deemed to be part of the Indenture.

ii

Table of Contents

iii

iv

v

INDENTURE, dated as of February 4, 2008, between UNITEDHEALTH GROUP INCORPORATED, a corporation duly organized and existing under the laws of the State of Minnesota (herein called the “ Company ”), having its principal office at UnitedHealth Group Center, 9900 Bren Road East, Minnetonka, Minnesota 55343, and U.S. BANK NATIONAL ASSOCIATION, a national banking association duly organized and existing under the laws of the United States of America, as Trustee (herein called the “ Trustee ”), having its designated corporate trust office at 60 Livingston Avenue, EP-MN-WS3C, St. Paul, MN 55107-2292.

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 notes or other evidences of indebtedness (herein called the “ Securities ”), to be issued in one or more series 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 series thereof (including holders from time to time of the Securities of any series held through a Holder which is a Depositary (as defined herein)), as follows:

ARTICLE I.

DEFINITIONS AND INCORPORATION BY REFERENCE

The following terms (except as otherwise expressly provided or unless the context otherwise clearly requires) for all purposes of this Indenture and of any indenture supplemental hereto shall have the respective meanings specified in this Section. All other terms used in this Indenture that are defined in the TIA, or the definitions of which in the Securities Act, are referred to in the TIA, including terms defined therein by reference to the Securities Act (except as herein otherwise expressly provided or unless the context otherwise clearly requires), shall have the meanings assigned to such terms in the TIA and Securities Act as in force at the date of this Indenture. All accounting terms used herein and not expressly defined shall have the meanings assigned to such terms in accordance with GAAP at the time of any computation. 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. The terms defined in this Article have the meanings assigned to them in this Article and include the plural as well as the singular.

“ 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 purposes of this definition, “control” (including, with correlative meanings, the terms “controlling,” “controlled by” and “under common control with”), as used with respect to any Person,

shall mean the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of such Person, whether through the ownership of voting securities, by agreement or otherwise.

“ Agent ” means any Authenticating Agent, Security Registrar, Paying Agent or co-registrar.

“ Bankruptcy Law ” means title 11, U.S. Code or any similar Federal or state law for the relief of debtors.

“ Board of Directors ” means the Board of Directors of the Company or any duly authorized (generally or in any particular respect) committee appointed by the Board of Directors of the Company.

“ Board Resolution ” means a copy of a resolution certified by the Secretary, any Assistant Secretary, or the Secretary to the Board of Directors 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. Where any provision of this Indenture refers to action to be taken pursuant to a Board Resolution (including establishment of any series of the Securities and the forms and terms thereof), such action may be taken by any committee, officer or employee of the Company authorized to take such action (generally or in any particular respect) by a Board Resolution.

“ Business Day ” means any day other than a Legal Holiday.

“ Capital Stock ” means (i) in the case of a corporation, corporate stock without limitation, common stock and preferred stock, (ii) in the case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock, (iii) in the case of a partnership or limited liability company, partnership interests (whether general or limited) or membership interests and (iv) any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person.

“ Commission ” means the Securities and Exchange Commission.

“ Common Stock ” means the common stock, par value $.01 per share, of the Company.

“ Company ” means the Person named as the “ Company ” in the first paragraph of this instrument, as obligor under the Securities, unless and until a successor replaces the Company in accordance with Article 6 hereof and thereafter means such successor.

“ 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, its Chief Executive Officer, its Chief Operating Officer, its Chief Financial Officer, a Vice President, its Treasurer, an Assistant Treasurer, its Secretary, an Assistant Secretary, its Secretary to the Board of Directors or by any other officer of the Company authorized to sign by Board Resolution, and delivered to the Trustee.

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“ Corporate Trust Office ” means the office of the Trustee at which at any particular time its corporate trust business shall be principally administered, which at the date of original execution of the Indenture is 60 Livingston Avenue, EP-MN-WS3C, St. Paul, MN 55107-2292.

“ Covenant Defeasance ” has the meaning specified in Section 903.

“ Defaulted Interest ” has the meaning specified in Section 307.

“ Depositary ” means, with respect to the Securities of any series issuable or issued in whole or in part in the form of one or more Global Securities, the clearing agency registered under the Exchange Act, specified for that purpose as contemplated by Section 301 or any successor clearing agency registered under the Exchange Act as contemplated by Section 305, and if at any time there is more than one such Person, “Depositary” as used with respect to the Securities of any series shall mean the Depositary with respect to the Securities of such series.

“ Direction ” has the meaning specified in Section 105.

“ Event of Default ” has the meaning specified in Section 701.

“ Exchange Act ” means the Securities Exchange Act of 1934, as amended.

“ 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 Accounting Standards Board or in such other statements by such other entity as have been approved by a significant segment of the accounting profession, which are in effect from time to time.

“ Global Security ” means a Security bearing the legend specified in Section 203 evidencing all or part of a series of Securities, issued to the Depositary for such series or its nominee, and registered in the name of such Depositary or nominee.

“ Government Securities ” means securities issued or directly and fully guaranteed or insured by the United States government or any agency or instrumentality thereof.

“ Holder ” means a Person in whose name a Security is registered.

“ Indebtedness ” means any indebtedness for money borrowed.

“ Indenture ” means this instrument as originally executed or as it may from time to time be supplemented or amended by one or more indentures supplemental hereto entered into pursuant to the applicable provisions hereof and shall include the terms of particular series of Securities established as contemplated by Section 301; provided , however , that, if at any time more than one Person is acting as Trustee under this instrument due to the appointment of one or more separate Trustees for any one or more separate series of Securities pursuant to Section 809(e), “Indenture” shall mean, with respect to such series of Securities for which any such Person is Trustee, this instrument as originally executed or as it may from time to time be supplemented or amended by one or more indentures supplemental hereto entered into pursuant to the applicable provisions hereof and shall include the terms of

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particular series of Securities for which such Person is Trustee established as contemplated by Section 301, exclusive, however, of any provisions or terms which relate solely to other series of Securities for which such Person is not Trustee, regardless of when such terms or provisions were adopted, and exclusive of any provisions or terms adopted by means of one or more indentures supplemental hereto executed and delivered after such Person had become such Trustee but to which such Person, as such Trustee, was not a party.

“ 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.

“ Legal Holiday ” has the meaning specified in Section 1203.

“ Legal Defeasance ” has the meaning specified in Section 902.

“ Lien ” means, any mortgage, lien, pledge, charge, security interest or encumbrance of any kind.

“ 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.

“ Officers ” means the Chairman of the Board, the Chief Executive Officer, the President, the Chief Operating Officer, the Chief Financial Officer, the Treasurer, any Assistant Treasurer, the Controller, the Secretary, any Assistant Secretary, the Secretary to the Board of Directors and any Vice President of the Company or any Subsidiary, as the case may be.

“ Officers’ Certificate ” means a certificate signed by the Chairman of the Board, the President, the Chief Executive Officer, the Chief Operating Officer, the Chief Financial Officer, or a Vice President of the Company, and by the Treasurer, an Assistant Treasurer, the Secretary, an Assistant Secretary, or the Secretary to the Board of Directors of the Company, and delivered to the Trustee.

“ Opinion of Counsel ” means an opinion from legal counsel. The counsel may be an employee of or counsel to the Company, any Subsidiary or 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 702.

“ Outstanding ”, when used with respect to Securities, means, as of the date of determination, all Securities theretofore authenticated and delivered under this Indenture, except:

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

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(ii) Securities 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, notice of such redemption has been duly given pursuant to this Indenture or provision therefor satisfactory to the Trustee has been made; and

(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;

provided , however , that in determining whether the Holders of the requisite principal amount of the Outstanding Securities have given any request, demand, authorization, direction, notice, consent or waiver hereunder or whether a quorum is present at a meeting of Holders of Securities, (i) the principal amount of an Original Issue Discount Security that shall be deemed to be Outstanding shall be the amount of the principal thereof that would be due and payable as of the date of such determination upon acceleration of the Maturity thereof pursuant to Section 702, and (ii) Securities owned by the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor shall be disregarded and deemed not to be Outstanding, except that, in determining whether the Trustee shall be protected in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Securities which a Responsible Officer of the Trustee actually knows to be so owned shall be so disregarded. Securities so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Securities and that the pledgee is not the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor.

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

“ Periodic Offering ” means an offering of Securities of a series from time to time the specific terms of which Securities, including without limitation the rate or rates of interest (or formula for determining 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 upon the issuance of such Securities.

“ Person ” means any individual, corporation, partnership, limited liability company, joint venture, association, joint-stock company, trust, unincorporated organization (including any subdivision or ongoing business of any such entity or substantially all of the assets of any such entity, subdivision or business).

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“ Place of Payment ”, when used with respect to the Securities of any series, means the place or places where the principal of (and premium, if any) and/or interest on the Securities of that series are payable.

“ 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 evidence the same debt as the mutilated, destroyed, lost or stolen Security.

“ Redemption Date ”, when used with respect to any Security or portion thereof to be redeemed, means the date fixed for such redemption pursuant to this Indenture.

“ Redemption Price ”, when used with respect to any Security or portion thereof to be redeemed, means the price at which it is to be redeemed pursuant to this Indenture.

“ Regular Record Date ” for the interest payable on any Interest Payment Date on the Securities of any series means the date specified for that purpose as contemplated by Section 301.

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

“ Securities ” has the meaning stated in the first recital of this Indenture and more particularly means any Securities authenticated and delivered under this Indenture; provided , however , that if at any time there is more than one Person acting as Trustee under this Indenture, “Securities” with respect to the Indenture as to which such Person is Trustee shall have the meaning stated in the first recital of this Indenture and shall more particularly mean Securities authenticated and delivered under this Indenture, exclusive, however, of Securities of any series as to which such Person is not Trustee.

“ Securities Act ” means the Securities Act of 1933, as amended.

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

“ Special Record Date ” means the date established for that purpose 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.

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“ Subsidiary ” means, with respect to any Person, (i) any corporation, association or other business entity of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency) to vote in the election of directors, managers or trustees thereof is at the time owned or controlled, directly or indirectly, by such Person or one or more of the other Subsidiaries of that Person (or a combination thereof) and (ii) any partnership (a) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person or (b) the only general partners of which are such Person or of one or more Subsidiaries of such Person (or any combination thereof).

“ TIA ” means the Trust Indenture Act of 1939, as amended, as in effect on the date on which this Indenture is qualified under the TIA.

“ 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.

Upon any application or request by the Company to the Trustee to take any action under any provision of this Indenture, the Company shall furnish to the Trustee an Officers’ Certificate stating that all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with and an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent, if any, have been complied with, except that in the case of any such application or request

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as to which the furnishing of such documents is specifically required by any provision of this Indenture relating to such particular application or request, no additional certificate or opinion need be furnished.

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

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

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

(3) a statement that, in the opinion of each such individual, he has made such examination or investigation as is necessary to enable him to express an informed opinion whether such covenant or condition has been complied with; and

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

Every such certificate provided under this Indenture shall be without personal recourse to the individual executing the same and may include an express statement to such effect.

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 any officer of the Company may be based, insofar as it relates to legal matters, upon a certificate or opinion of, or representations by, counsel, unless such officer knows, or in the exercise of reasonable care should know, that the certificate, opinion or representations with respect to the matters upon which such officer’s 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. Any certificate or opinion of counsel may be stated to be based on the certificates or opinions of other counsel, in which event it shall be accompanied by a copy of such other certificates or opinions.

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. All applications, requests, certificates, statements or other instruments given under this Indenture shall be without personal recourse to any individual giving the same and may include an express statement to such effect.

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(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 (including Persons who hold their Securities through a Holder which is a Depositary) in person or by an agent 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 801) conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section.

Without limiting the generality of the foregoing, a Holder, including a Depositary that is a Holder of a Global Security, may make, give or take, by a proxy or proxies duly appointed in writing, any request, demand, authorization, direction, notice, consent, waiver or other action provided or permitted by this Indenture to be made, given or taken by the Holders, and a Depositary that is a Holder of a Global Security may provide its proxy or proxies to the beneficial owners of interest in any such Global Security.

(b) The fact and date of the execution by any Person of any such instrument or writing may be proved in any reasonable manner, provided that, in any instance, the Trustee may require further proof with respect to any matter referred to in this Section.

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

(d) The Company may fix any day as the record date for the purpose of determining the Holders (including Persons who hold Securities through a Holder which is a Depositary) of Securities of any series entitled to give or take any request, demand, authorization, direction, notice, consent, waiver or other action, or to vote on any action, authorized or permitted to be given or taken by Holders of Securities of such series. If not set by the Company prior to the first solicitation of a Holder of Securities of such series made by any Person in respect of any such action, or, in the case of any such vote, prior to such vote, the record date for any such action or vote shall be the 30th day (or, if later, the date of the most recent list of Holders required to be provided pursuant to TIA § 312) prior to such first solicitation or vote, as the case may be. With regard to any record date for action to be taken by the Holders (including Persons who hold Securities through a Holder which is a Depositary) of one or more series of Securities, only the Holders of Securities of such series on such date (or their duly designated proxies) shall be entitled to give or take, or vote on, the relevant action.

With regard to any action that may be given or taken hereunder only by Holders (including Persons who hold their Securities through a Holder which is a Depositary) of a requisite principal amount of Outstanding Securities of any series (or their

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duly appointed agents) and for which a record date is set pursuant to this subsection (d), the Company may, at its option, set an expiration date after which no such action purported to be given or taken by any Holder shall be effective hereunder unless given or taken on or prior to such expiration date by Holders (including Persons who hold Securities through a Holder which is a Depositary) of the requisite principal amount of Outstanding Securities of such series on such record date (or their duly appointed agents). On or prior to any expiration date set pursuant to this subsection (d), the Company may, on one or more occasions at its option, extend such date to any later date. Nothing in this subsection (d) shall prevent any Holder (or any duly appointed agent thereof) from giving or taking, after any expiration date, any action identical to, or, at any time, contrary to or different from any action given or taken, or purported to have been given and taken, hereunder by a Holder on or prior to such date, in which event the Company may set a record date in respect hereof pursuant to this subsection (d).

Notwithstanding the foregoing, upon actual receipt by a Responsible Officer of the Trustee, with respect to Securities of any series, of (i) any “Notice of Default” pursuant to Section 701, (ii) any declaration or acceleration, or any rescission and annulment of any such declaration, pursuant to Section 702, or (iii) any waiver given pursuant to Section 704 (any such notice, declaration, rescission and annulment, or waiver being referred to herein as a “ Direction ”), a record date shall automatically and without any other action by any Person be set for the purpose of determining the Holders (including Persons who hold Securities through a Holder which is a Depositary) of Outstanding Securities of such series entitled to join in such Direction, which record date shall be the close of business on the day the Trustee receives such Direction. The Holders (including Persons who hold Securities through a Holder which is a Depositary) of Outstanding Securities of such series on such record date (or their duly appointed agents), and only such Persons, shall be entitled to join in such Direction, whether or not such Holders remain Holders after such record date; provided that , unless such Direction shall have become effective by virtue of Holders (including Persons who hold Securities through a Holder which is a Depositary) of the requisite principal amount of Outstanding Securities of such series on such record date (or their duly appointed agents) having joined therein on or prior to the 90th day after such record date, such Direction shall automatically and without any action by any Person be canceled and be of no further effect. Nothing in this paragraph shall prevent a Holder (or duly appointed agent thereof) from giving, before or after the expiration of such 90-day period, a Direction contrary to or different from, or, after the expiration of such period, identical to, a Direction that has been canceled pursuant to the proviso to the preceding sentence, in which event a new record date in respect thereof shall be set pursuant to this subsection (d).

(e) 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.

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Any request, demand, authorization, direction, notice, consent, waiver or Act of Holders or other document provided or permitted by this Indenture to be made upon, given or furnished to, or filed with,

(1) the Trustee by any Holder or by the Company shall be sufficient for every purpose hereunder (unless otherwise herein expressly provided) if made, given, furnished or filed in writing to or with a Responsible Officer of the Trustee at its Corporate Trust Office, Attention: Corporate Trust Administration, or

(2) 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 instrument (Attention: Chief Legal Officer) or at any other address previously furnished in writing to a Responsible Officer of the Trustee by the Company.

Where this Indenture provides for notice to Holders of any event, such notice shall be sufficiently given (unless otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, to each Holder (including Persons who hold Securities through a Holder which is a Depositary if the name and address of such beneficial holder has been provided in writing to the Person required to give such notice prior to the date such notice is given) affected by such event, at such Holder’s address as it appears in the Security Register or as provided in writing by the Depositary, 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. Any notice mailed to the Holder in the manner herein prescribed shall be conclusively deemed to have been received by such Holder, whether or not such Holder actually receives such notice. Where this Indenture provides for notice in any manner, such notice may be waived in writing by the Person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with a Responsible Officer of 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 by or with the approval of the Trustee shall constitute a sufficient notification for every purpose hereunder.

Holders may communicate pursuant to TIA § 312(b) with other Holders with respect to their rights under this Indenture or the Securities. The Company, the Trustee, the Registrar and anyone else shall have the protection of TIA § 312(c).

Whenever this Indenture refers to a provision of the TIA, the provision is incorporated by reference in and made a part of this Indenture.

The following TIA terms used in this Indenture have the following meanings:

“indenture securities” means the Securities;

“indenture security holder” means a Holder;

“indenture to be qualified” means this Indenture;

“indenture trustee” or “institutional trustee” means the Trustee;

“obligor” on the Securities means the Company and any successor obligor upon the Securities.

All other terms used in this Indenture that are defined by the TIA, defined by TIA reference to another statute or defined by the Commission rule under the TIA have the meanings so assigned to them.

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ARTICLE II.

SECURITY FORMS

The Securities of each series, including Global Securities representing Securities of such series, shall be substantially in such form (not inconsistent with this Indenture) as shall be established, without the approval of any Holders or the Trustee, by or pursuant to a Board Resolution in accordance with Section 301 or by one or more indentures supplemental hereto, in each case 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 may be required to comply with the rules of any securities exchange or as may, consistently herewith, be determined by the officers executing such Securities, as evidenced by their execution of the Securities.

The definitive Securities may be printed or may be produced in any other manner, all as determined by the officers executing such Securities, as evidenced by their execution of such Securities.

The Trustee’s certificate of authentication shall be in substantially the following form:

This is one of the Securities of the series designated therein and issued pursuant to the within-mentioned Indenture.

Any Global Security authenticated and delivered hereunder shall, in addition to the provisions established by or pursuant to a Board Resolution or in one or more indentures supplemental hereto in accordance with Section 201, bear a legend in substantially the following form or such similar form as may be required by the Depositary:

“Unless this certificate is presented by an authorized representative of [Depositary] to the issuer or to its agent for registration of transfer, exchange or payment, and any certificate issued is registered in the name of [Depositary Nominee] or such other name as requested by an authorized representative of [Depositary] and any payment is made to [Depositary Nominee], ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL since the registered owner hereof, [Depositary Nominee], has an interest herein.”

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ARTICLE III.

THE SECURITIES

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

The Securities may be issued in one or more series. There shall be established, without the approval of any Holders or the Trustee, by or pursuant to authority granted by one or more Board Resolutions, and, subject to Section 303, there shall be set forth in an Officers’ Certificate, or established in one or more indentures supplemental hereto, prior to the initial issuance of Securities of any series, all or any of the following, as applicable:

(1) the title of the Securities of the series (which shall distinguish the Securities of the series from Securities of any other series) and the form of the Securities of the series;

(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 lieu of, other Securities of the series pursuant to Section 304, 305, 306, and 1007 and except for any Securities which, pursuant to Section 303, are deemed never to have been authenticated and delivered hereunder) and the absence of such limitation shall mean that the Company may issue from time to time additional securities of such series without limitation as to aggregate principal amount;

(3) the Person to whom any interest on a Security of the series shall be payable, if other than 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;

(4) the date or dates, or the method by which such date or dates are determined or extended, on which the principal or installments of principal and premium, if any, of the Securities of the series is or are payable;

(5) the rate or rates (which may be fixed or variable) at which the Securities of the series shall bear interest, if any, or the method by which such rate or rates shall be determined, the date or dates from which such interest shall accrue, the Interest Payment Dates on which such interest shall be payable, the Regular Record Date for the interest payable on any Interest Payment Date and the circumstances, if any in which the Company may defer interest payments and the basis upon which interest shall be calculated if other than that of a 360-day year of twelve 30-day months;

(6) the place or places where the principal of (and premium, if any) and interest on Securities of the series shall be payable, any Securities of the series may be surrendered for registration of transfer or exchange and notices and demands to or upon the Company with respect to the Securities of the series and this Indenture may be served, other than or in addition to the Corporate Trust Office of the Trustee;

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(7) if applicable, the period or periods within which, the price or prices at which and the terms and conditions upon which Securities of the series may be redeemed, in whole or in part, at the option of the Company;

(8) the obligation, if any, of the Company to redeem or purchase Securities of the series 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 shall be redeemed or purchased, in whole or in part, pursuant to such obligation;

(9) whether the Securities of the series will be convertible into or exchangeable for shares of Common Stock, and if so, the terms and conditions upon which such Securities will be so convertible or exchangeable, and any deletions from or modifications or additions to this Indenture to permit or to facilitate the issuance of such convertible or exchangeable Securities or the administration thereof;

(10) the identity of each Security Registrar and Paying Agent, if other than or in addition to the Trustee;

(11) if the amount of principal of, or any premium or interest on, any Securities of the series may be determined by reference to an index or pursuant to a formula, the manner in which such amounts shall be determined;

(12) the applicability of, and any addition to or change in, the covenants and definitions currently set forth in this Indenture;

(13) if other than denominations of $1,000 or any amount in excess thereof which is an integral multiple of $1,000, the denominations in which Securities of the series shall be issuable;

(14) any other event or events of default applicable with respect to Securities of the series in addition to or in lieu of those provided in Section 701 and any change in the right of the Trustee or the Holders to declare the principal of or any premium or interest on such Securities due and payable;

(15) if less than the principal amount thereof, the portion of the principal amount of Securities of the series which shall be payable upon declaration of acceleration of the Maturity thereof pursuant to Section 702;

(16) whether the Securities of the series shall be issued in whole or in part in the form of one or more Global Securities and, if so, (a) the Depositary with respect to such Global Security or Securities and (b) the circumstances under which any such Global Security may be exchanged for Securities registered in the name of, and any transfer of such Global Security may be registered to, a Person other than such Depositary or its nominee, if other than as set forth in Section 305;

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(17) if applicable, that the Securities of the series, in whole or any specified part, shall not be defeasible pursuant to Section 902 or Section 903 or both such Sections and, if other than by a Company Order, the manner in which any election by the Company to defend such Securities shall be evidenced;

(18) any other terms of the series (which terms shall not be inconsistent with the provisions of this Indenture, except as permitted by Section 1001(v)); and

(19) CUSIP numbers.

All Securities of any one series (other than Securities offered in a Periodic Offering) shall be substantially identical except as to denomination and except as may otherwise be provided by or pursuant to the Board Resolution referred to above and, subject to Section 303, set forth, or determined in the manner provided, in the Officers’ Certificate referred to above or in any such indenture supplemental hereto. All Securities of any one series need not be issued at the same time. Unless otherwise provided, Securities of a single series may have different terms, and a series may be reopened, without the consent of the Holders of Securities of such series, for issuance of additional Securities of such series.

If any of the terms of the series are established by action taken pursuant to a Board Resolution, a copy of an appropriate record of such action shall be certified by the Secretary, an Assistant Secretary, or the Secretary to the Board of Directors of the Company and delivered to the Trustee at or prior to the delivery of the Officers’ Certificate setting forth the terms of the series.

With respect to Securities of a series offered in a Periodic Offering, such Board Resolution and Officers’ Certificate or supplemental indenture may provide general terms or parameters for Securities of such series and provide either that the specific terms of particular Securities of such series shall be specified in a Company Order or that such terms shall be determined by the Company or its agents in accordance with other procedures specified in a Company Order as contemplated by the third paragraph of Section 303.

Unless otherwise provided in the applicable Officers’ Certificate or supplemental indenture, the Securities of each series shall be issued 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, the Securities of such series shall be issuable in denominations of $1,000 or any amount in excess thereof which is an integral multiple of $1,000.

The Securities shall be executed on behalf of the Company by its Chairman of the Board, its President, its Chief Executive Officer, its Chief Operating Officer, its Chief Financial Officer or one of its Vice Presidents, and attested by its Secretary, one of its Assistant Secretaries or the Secretary to the Board of Directors. The signature of any of these officers on the Securities may be manual or facsimile.

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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 individuals or any of them have ceased to hold such offices prior to the authentication and delivery of such Securities or did not hold such offices at the date of such Securities.

At any time and from time to time after the execution and delivery of this Indenture, the Company may deliver Securities of any series executed by the Company to the Trustee for authentication, together with a Company Order for the authentication and delivery of such Securities, or, in the case of Securities offered in a Periodic Offering, from time to time in accordance with such other procedures (including, without limitation, the actual receipt by the Trustee of electronic instructions from the Company or its duly authorized agents, promptly confirmed in writing by the Company) acceptable to the Trustee as may be specified from time to time by a Company Order for establishing the specific terms of particular Securities being so offered, and the Trustee in accordance with the Company Order shall authenticate and deliver such Securities. If the form or forms or terms of the Securities of the series have been established by or pursuant to one or more Board Resolutions as permitted by Sections 201 and 301, in authenticating such Securities and accepting the additional responsibilities under this Indenture in relation to such Securities, the Trustee shall be entitled to receive, and (subject to Section 801) shall be fully protected in conclusively relying upon

(a) an Opinion of Counsel (subject to customary exceptions) stating:

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

(2) that the terms of such Securities have been established in conformity with the provisions of this Indenture;

(3) that authentication and delivery of such Securities and the execution and delivery of the supplemental indenture, if any, by the Trustee will not violate the terms of the Indenture;

(4) that the Company has the corporate power to issue, and has duly authorized, such Securities; and

(5) that such Securities, when authenticated and delivered by a Responsible Officer of 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 against the Company in accordance with their terms, subject to bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or transfer and other laws of general applicability relating to or affecting the enforcement of creditors’ rights and to general equity principles;

(b) an executed supplemental indenture, if any;

(c) a copy of a Board Resolution; and

(d) an Officers’ Certificate;

provided , however , that, with respect to Securities of a series offered in a Periodic Offering, the Trustee shall be entitled to receive such Opinion of Counsel in connection only with the first authentication of each form of Securities of such series and that the opinions described in clauses (a)(2) and (a)(5) above may state, respectively, that

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(2) if the terms of such Securities are to be established pursuant to a Company Order or pursuant to such procedures as may be specified from time to time by a Company Order, all as contemplated by a Board Resolution or action taken pursuant thereto, such terms will have been duly authorized by the Company and established in conformity with the provisions of this Indenture; and

(5) that such Securities, when executed by the Company, completed, authenticated and delivered by the Trustee in accordance with this Indenture, and issued and delivered by the Company and paid for, all in accordance with any agreement of the Company relating to the offering, issuance and sale of such Securities, will be duly issued under this Indenture and will constitute valid and legally binding obligations of the Company, enforceable against the Company in accordance with their terms, subject to bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or transfer and other laws of general applicability relating to or affecting the enforcement of creditors’ rights and to general equity principles.

With respect to Securities of a series offered in a Periodic Offering, the Trustee may conclusively rely, as to the authorization by the Company of any of such Securities, the form or forms and terms thereof and the legality, validity, binding effect and enforceability thereof, upon the Opinion of Counsel, Company Order and other documents delivered pursuant to Sections 201 and 301 and this Section, as applicable, in connection with the first authentication of a form of Securities of such series and it shall not be necessary for the Company to deliver such Opinion of Counsel and other documents (except as may be required by the specified other procedures, if any, referred to above) at or prior to the time of authentication of each Security of such series unless and until a Responsible Officer of the Trustee receives notice that such Opinion of Counsel or other documents have been superseded or revoked, and may assume compliance with any conditions specified in such Opinion of Counsel (other than any conditions to be performed by the Trustee). If such form or forms 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.

Each Security shall be dated the date of its authentication.

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 a Responsible Officer of 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. Notwithstanding the foregoing, if any Security shall have been authenticated and delivered hereunder but never issued and sold by the Company, and the Company shall deliver such Security to the Trustee for cancellation as provided in Section 309, for all purposes of this Indenture such Security shall be deemed never to have been authenticated and delivered hereunder and shall never be entitled to the benefits of this Indenture.

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Pending the preparation of definitive Securities of any series, the Company may execute, and upon Company Order a Responsible Officer of the Trustee shall authenticate and deliver, temporary Securities which are printed 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 determine, as evidenced by their execution of such Securities. In the case of Securities of any series, such temporary Securities may be in the form of Global Securities.

If temporary Securities of any series are issued, the Company will cause definitive Securities of that series to be prepared without unreasonable delay. After the preparation of definitive Securities of such series, the temporary Securities of such series shall be exchangeable, subject to Section 305, for definitive Securities of like tenor of such series upon surrender of the temporary Securities of such series at the office or agency of the Company in a Place of Payment for that series, without charge to the Holder. Upon surrender for cancellation of any one or more temporary Securities of any series the Company shall execute and a Responsible Officer of the Trustee shall authenticate and deliver in exchange therefor a like principal amount of definitive Securities of the same series and of like tenor and of any authorized denominations. Until so exchanged the temporary Securities of any series shall in all respects be entitled to the same benefits under this Indenture as definitive Securities of such series and tenor.

The Company shall cause to be kept at the Corporate Trust Office of the Trustee a register (the “ Security Register ”) in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Securities and of transfers of Securities. The Trustee is hereby appointed “Security Registrar” of each series of Securities for the purpose of registering Securities and transfers of Securities as herein provided at the Corporate Trust Office.

Upon surrender for registration of transfer of any Security of any series at the office or agency of the Company in any Place of Payment for such series, the Company shall execute and a Responsible Officer of the Trustee shall authenticate and deliver (in the name of the designated transferee or transferees) one or more new Securities of the same series, of any authorized denominations and of a like aggregate principal amount and tenor and bearing a number not contemporaneously outstanding.

At the option of the Holder, Securities of any series may be exchanged for other Securities of the same series, of any authorized denominations and of a like aggregate principal amount and tenor, upon surrender of the Securities to be exchanged at the office or agency of the Company in any Place of Payment for such series. Whenever any Securities are so surrendered for exchange, the Company shall execute, and a Responsible Officer of the Trustee shall authenticate and deliver, the Securities which the Holder making the exchange is entitled to receive and bearing a number not contemporaneously outstanding.

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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 such Holder’s attorney duly authorized in writing.

No service charge shall be made for any registration of transfer or exchange of Securities, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any registration of transfer or exchange of Securities, other than exchanges pursuant to Section 304 or 1007 not involving any transfer.

The Company may but shall not be required (i) to issue, register the transfer of or exchange Securities of any series 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 selected for redemption under Section 403 and ending at the close of business on the day of such mailing, (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 or (iii) to register the transfer of or exchange any certificated Securities during a period beginning five days before the date of Maturity with respect to such Security and ending on such date of Maturity.

Notwithstanding the foregoing, except as otherwise specified as contemplated by Section 301, no Global Security shall be exchangeable pursuant to this Section 305 for Securities registered in the name of, and no transfer of a Global Security of any series may be registered to, any Person other than the Depositary for such Security or its nominee, unless (i) such Depositary notifies the Company that it is unwilling or unable to continue as Depositary for such Global Security or the Company determines that the Depositary is unable to continue as Depositary and the Company thereafter fails to appoint a successor Depositary, (ii) the Company provides for such exchange or registration of transfer pursuant to Section 301 of this Indenture, (iii) the Company executes and delivers to the Trustee a Company Order that such Global Security shall be so exchangeable and the transfer thereof so registrable, or (iv) there shall have occurred and be continuing an Event of Default with respect to the Securities of such series which entitles the Holders of such Securities to accelerate the maturity thereof. Upon the occurrence in respect of any Global Security of any series of any one or more of the conditions specified in clauses (i), (ii), (iii) or (iv) of the preceding sentence or such other conditions as may be specified as contemplated by Section 301 for such series, such Global Security may be exchanged for Securities not bearing the legend specified in Section 203 and registered in the names of such Persons as may be specified by the Depositary (including Persons other than the Depositary or its nominees).

Notwithstanding any other provision of this Indenture, a Global Security may not be transferred except as a whole by the Depositary for such Global Security to a nominee of the Depositary or by a nominee of the Depositary to the Depositary or another nominee of the Depositary.

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If any mutilated Security, including a Global Security, is surrendered to the Trustee or the Company, together with such security, bond or indemnity as may be required by the Trustee or the Company to save each of them and any agent of either of them harmless, the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor a new Security, including a new Global Security if the mutilated Security was a Global Security, of the same series 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, including a Global Security if the destroyed, lost or stolen Security was a Global Security, and (ii) such security or indemnity as may be required by them to save each of them and any agent of either of them harmless, then, in the absence of notice to the Company or the Trustee that such Security has been acquired by a bona fide purchaser, the Company shall execute and upon its written request the Trustee shall authenticate and deliver, in lieu of any such destroyed, lost or stolen Security, a new Security, including a Global Security if the destroyed, lost or stolen Security was a Global Security, of the same series 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), if any, connected therewith.

Every new Security of any series 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. A new Security shall have such legends as appeared on the old Security unless the Company determines otherwise.

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.

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Unless otherwise provided as contemplated by Section 301 with respect to any series of Securities, 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 in the Security Register at the close of business on the Regular Record Date for such Interest Payment Date.

Any interest on any Security of any series which is payable but is not punctually paid or duly provided for on any Interest Payment Date (herein called “ Defaulted Interest ”) shall forthwith cease to be payable to the 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 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 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 clause provided. Thereupon the Trustee shall fix a Special Record Date for the payment of such Defaulted Interest which shall be not more than 15 days and not less than 5 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 at such Holder’s 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 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 in any other lawful manner not inconsistent with the requirements of any securities exchange on which such Securities may be listed, and upon such notice as may be required by such exchange, if, after notice given by the Company to the Trustee of the proposed payment pursuant to this clause, such manner of payment shall be deemed practicable by the Trustee.

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.

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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 in the Security Register as the absolute owner of such Security for the purpose of receiving payment of or on account of the principal of (and premium, if any) and (subject to Section 307) interest 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. All such payments so made to any such person, or upon his order, shall be valid, and, to the extent of the sum or sums so paid, effectual to satisfy and discharge the liability for moneys payable upon any such Security.

No Holder of any beneficial interest in any Global Security held on its behalf by a Depositary (or its nominees) shall have any rights under this Indenture with respect to such Global Security or any Security represented thereby, and such Depositary may be treated by the Company, the Trustee, and any agent of the Company or the Trustee as the owner of such Global Security or any Security represented thereby for all purposes whatsoever. Notwithstanding the foregoing, with respect to any Global Security, nothing herein shall prevent the Company, the Trustee, or any agent of the Company or the Trustee, from giving effect to any written certification, proxy or other authorization furnished by a Depositary as Holder of such Global Security, or impair, as between a Depositary and the owners of beneficial interests in such Global Security, the operation of customary practices governing the exercise of the rights of the Depositary (or its nominees) as Holder of such Global Security. None of the Company, the Trustee, the Paying Agent, or the Security Registrar will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests of a Global Security or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

All Securities surrendered for payment, redemption, registration of transfer or exchange or for credit against any sinking fund payment or analogous fund shall, if surrendered to any Person other than the Trustee, be delivered to the Trustee for cancellation and shall be promptly canceled by it. The Company may at any time deliver to the Trustee for cancellation any Securities previously authenticated and delivered hereunder which the Company may have acquired in any manner whatsoever, and may deliver to the Trustee (or to any other Person for delivery to the Trustee) for cancellation any Securities previously authenticated hereunder which the Company has not issued and sold, and all Securities so delivered shall be promptly canceled by the Trustee. No Securities shall be authenticated in lieu of or in exchange for any Securities canceled as provided in this Section, except as expressly permitted by this Indenture. The Trustee is hereby directed by the Company to cancel the Securities held by the Trustee (subject to the record retention requirements of the Exchange Act). All cancelled Securities held by the Trustee shall be disposed of in accordance with the Trustee’s customary procedures.

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Except as otherwise specified pursuant to Section 301 for Securities of any series, interest on the Securities of each series shall be computed on the basis of a 360-day year of twelve 30-day months and no interest will accrue with respect to the 31st day of any month.

The Company in issuing the Securities may use “CUSIP” numbers, and if it does so, the Trustee shall use the applicable CUSIP number in notices of redemption or exchange as a convenience to Holders; provided that any such notice may state that no representation is made as to the correctness or accuracy of the CUSIP number printed in the notice or on the Securities, and that reliance may be placed only on the other identification numbers printed on the Securities. The Company will promptly notify the Trustee of any change in any CUSIP number.

ARTICLE IV.

REDEMPTION OF SECURITIES

Unless otherwise specifically provided for in accordance with Section 301 with respect to any series of Securities, the Company shall have no mandatory redemption or sinking fund obligations with respect to the Securities of any series. Securities of any series which are redeemable before their Stated Maturity in accordance with their terms as specifically established in accordance with Section 301 shall be redeemable in accordance with their terms and, except as otherwise provided by such terms, in accordance with this Article.

If the Company elects to redeem any Securities pursuant to any optional redemption provisions established with respect to such series hereof, it shall furnish to the Trustee, at least 40 days but not more than 60 days before the Redemption Date, an Officers’ Certificate setting forth (i) such Redemption Date, (ii) the Redemption Price, (iii) if the Securities of such series have different terms and less than all of the Securities of such series are to be redeemed, the terms of the Securities to be redeemed and (iv) if less than all the Securities of such series with identical terms are to be redeemed, the principal amount of such 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 Officers’ Certificate evidencing compliance with such restriction.

If less than all of the Securities of like tenor of any series are to be redeemed at any time, the Trustee shall select the particular Securities to be redeemed among the Holders on a pro rata basis (and in such manner as complies with applicable legal and stock exchange requirements, if any) or in such other manner as the Trustee, in the exercise of its reasonable discretion, deems fair

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and appropriate. In the event of partial redemption by lot, the particular Securities to be redeemed from the Outstanding Securities of like tenor of such series shall be selected, unless otherwise provided herein, not less than 30 nor more than 60 days prior to the Redemption Date by the Trustee from the Outstanding Securities of like tenor of such series not previously called for redemption.

The Trustee shall promptly notify the Company in writing of the Securities selected for redemption and, in the case of any Security selected for partial redemption, the principal amount thereof to be redeemed. Securities and portions of them selected shall be in amounts of $1,000 or whole multiples of $1,000; except that if all of the Securities of a Holder are to be redeemed, the entire outstanding amount of Securities held by such Holder, even if not a multiple of $1,000, shall be redeemed. Except as provided in the preceding sentence, provisions of this Indenture that apply to Securities called for redemption also apply to portions of Securities called for redemption.

At least 30 days but not more than 60 days before a Redemption Date, notice of redemption shall be delivered by first-class mail, postage prepaid, to each Holder whose Securities are to be redeemed at each such Holder’s address appearing in the Security Register.

The notice shall identify the Securities to be redeemed and shall state:

(1) the Redemption Date;

(2) the Redemption Price;

(3) if less than all the Outstanding Securities of like tenor of any series are to be redeemed, the portion of the principal amount of any Security of such series to be redeemed and that, after the redemption date upon surrender of such Security, a new Security or Securities in principal amount equal to the unredeemed portion shall be issued;

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

(5) that, unless the Company defaults in making such redemption payment, interest on Securities called for redemption ceases to accrue on and after the Redemption Date;

(6) the paragraph of the Securities and/or Section of this Indenture pursuant to which the Securities called for redemption are being redeemed; and

(7) that no representation is made as to the correctness or accuracy of the CUSIP number listed in such notice or printed on the Securities.

At the Company’s request, the Trustee shall give the notice of redemption in the Company’s name and at its expense; provided , however , that the Company shall have delivered to the Trustee, at least 40 days prior to the Redemption Date, an Officers’ Certificate requesting that the Trustee give such notice and setting forth the information to be stated in such notice as

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provided in the preceding paragraph. The notice mailed in the manner herein provided shall be conclusively presumed to have been duly given whether or not the Holder receives such notice. In any case, failure to give such notice by mail or any defect in the notice to the Holder of any Security shall not affect the validity of the proceeding for the redemption of any other Security.

Once notice of redemption is mailed in accordance with Section 404 hereof, Securities called for redemption become due and payable on the Redemption Date at the Redemption Price plus accrued and unpaid interest, if any, to such date.

At or before 10:00 a.m. Central Time on the 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 503) an amount of money, sufficient to pay the Redemption Price of and accrued interest on all Securities to be redeemed on that date. The Trustee or the Paying Agent shall promptly return to the Company any money deposited with the Trustee or the Paying Agent by the Company in excess of the amounts necessary to pay the Redemption Price of (including any applicable premium), and accrued interest on, all Securities to be redeemed.

Notice of redemption having been given as required above, 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 (unless the Company shall default in the payment of the Redemption Price and accrued interest) such Securities shall cease to bear interest. Upon surrender of any such Security for redemption in accordance with such notice, such Security shall be paid by the Company at the Redemption Price, together with accrued interest to the Redemption Date; provided , however , that, unless otherwise specified as contemplated by Section 301, 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 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 prescribed therefor in the Security.

Any Security which is to be redeemed in part shall be surrendered at a Place of Payment for such series (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 such Holder’s 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

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Securities of the same series and of like tenor, 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. To the extent a series of Securities represented by a Global Security is to be redeemed only in part, a notation of such redemption shall be made by the Trustee in the schedule of exchanges on the Global Security.

ARTICLE V.

COVENANTS

The Company covenants and agrees for the benefit of each series of Securities that it will duly and punctually pay or cause to be paid the principal of (and premium, if any) and interest on the Securities of such series in accordance with the terms of such Securities and this Indenture. Principal of (premium, if any) and interest on the Securities of any series shall be considered paid on the date due if the Paying Agent, if other than the Company or a Subsidiary of the Company, holds as of 10:00 a.m. Central Time on the due date money, deposited by the Company in immediately available funds and designated for and sufficient to pay all principal, premium, if any, and interest then due. Such Paying Agent shall return to the Company, no later than one Business Day following the date of payment, any money (including accrued interest) that exceeds such amount of principal (premium, if any) and interest paid on the Securities of such series.

The Company shall, unless otherwise provided for as contemplated by Section 301, pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal of the Securities of any series at the rate equal to 1% per annum in excess of the interest rate then applicable to such series to the extent lawful. In addition, the Company shall pay interest on the Securities of any series (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest (without regard to any applicable grace period) at the same rate to the extent lawful.

The Company shall maintain in each Place of Payment for any series of Securities an office or agency (which may be an office of the Trustee or an affiliate of the Trustee, the Security Registrar or co-registrar) where Securities of such series may be surrendered for registration of transfer or exchange and where notices and demands to or upon the Company in respect of the Securities of such series and this Indenture may be served. The Company shall give prompt written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company shall fail to maintain such an office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the Corporate Trust Office of the Trustee, and the Company hereby appoints the Trustee as its agent to receive all such presentations, surrenders, notices and demands.

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The Company may also from time to time designate one or more other offices or agencies where the Securities of one or more series may be presented or surrendered for any or all such purposes and may from time to time rescind such designations; provided , however , that no such designation or rescission shall in any manner relieve the Company of its obligation to maintain an office or agency in each Place of Payment for Securities of any series for such purposes. The Company shall 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.

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

Whenever the Company shall have one or more Paying Agents for any series of Securities, it will, prior to each due date of the principal of (and premium, if any) or interest on any Securities of such series, 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, and (unless such Paying Agent is the Trustee) the Company will promptly notify the Trustee of any failure to take such action.

The Company will cause each Paying Agent for any series of Securities 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 received by it for the payment of the principal of (and premium, if any) or interest on Securities of such series (whether such sums have been paid to it by the Company or by any other obligor on the Securities of such series) in trust for the benefit of the Holders of such Securities until such sums shall be paid to such Holders 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 such series) in the making of any payment of principal (and premium, if any) or interest on the Securities of such series; and

(3) during the continuance of any such default by the Company (or any other obligor upon the Securities of such series) in the making of any payment of principal (and premium, if any) or interest on the Securities of such series, 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.

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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 on any Security and remaining unclaimed for two years after such principal (and premium, if any) or interest 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 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.

(i) So long as any of the Securities remain Outstanding, the Company shall file with the Trustee, within 15 days after the Company files the same with the Commission, copies of the annual reports and of the information, documents, and other reports which the Company may be required to file with the Commission pursuant to Section 13 or Section 15(d) of the Exchange Act. The filing of such reports, information and documents with the Commission on EDGAR (or any successor system thereto) shall be deemed to constitute filing of such reports, information and documents with the Trustee; provided , however that the Company shall provide a physical or electronic copy thereof to the Trustee promptly following a request therefor from the Trustee. The Company shall also comply with the provisions of TIA § 314(a).

(ii) Delivery of such reports, information and documents to the Trustee is for information purposes only and the Trustee’s receipt of such shall not constitute constructive notice of any information contained therein or determinable from information contained therein, including the Company’s compliance with any of its covenants hereunder (as to which the Trustee is entitled to rely exclusively on Officers’ Certificates).

(i) The Company shall deliver to the Trustee, within 120 days after the end of each fiscal year, a brief certificate (which need not comply with Section 103) from any Officer of the Company as to his or her knowledge of the Company’s compliance with all conditions and covenants under this Indenture (such compliance to be determined without regard to any period of grace or requirement of notice provided under this Indenture).

(ii) The Company shall, so long as any of the Securities of any series are Outstanding, deliver to the Trustee, within five Business Days upon any Officer becoming aware of (a) any default or Event of Default with respect to such series of Securities or (b) any event of default under any other mortgage, indenture or instrument, an Officers’ Certificate specifying such default, Event of Default or event of default and what action the Company is taking or proposes to take with respect thereto.

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Subject to Article 6 hereof, the Company shall do or cause to be done all things necessary to preserve and keep in full force and effect its corporate existence.

The Company shall file with the Trustee promptly at the end of each calendar year (i) a written notice specifying the amount of original issue discount (including daily rates and accrual periods) accrued on Outstanding Securities as of the end of such year and (ii) such other specific information relating to such original issue discount as may then be relevant under the Internal Revenue Code of 1986, as amended from time to time.

ARTICLE VI.

SUCCESSORS

The Company may not consolidate or merge with or into (whether or not the Company is the surviving corporation), or sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of its properties or assets in one or more related transactions, to another Person unless:

(i) the Company is the surviving Person or the Person formed by or surviving any such consolidation or merger (if other than the Company) or to which such sale, assignment, transfer, lease, conveyance or other disposition shall have been made is a corporation organized or existing under the laws of the United States, any state thereof or the District of Columbia;

(ii) the Person formed by or surviving any such consolidation or merger (if other than the Company) or the Person to which such sale, assignment, transfer, lease, conveyance or other disposition shall have been made assumes all the obligations of the Company under the Securities and this Indenture pursuant to a supplemental indenture in a form reasonably satisfactory to the Trustee; and

(iii) immediately after such transaction no default or Event of Default exists.

Upon any consolidation or merger, or any sale, assignment, transfer, lease, conveyance or other disposition of all or substantially all of the assets of the Company in accordance with Section 601 hereof, the successor entity formed by such consolidation or into or with which the Company is merged or to which such sale, assignment, transfer, lease, conveyance or other disposition is made shall succeed to, and be substituted for (so that from and after the date of such consolidation, merger, sale, assignment, transfer, lease, conveyance or other disposition, the provisions of this Indenture referring to the “Company” shall refer instead to the successor entity), and may exercise every right and power of the Company under this Indenture with the same effect as if such successor Person has been named as the Company, herein.

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Upon the order of such successor entity instead of the Company and subject to all the terms, conditions and limitations in this Indenture prescribed, the Trustee shall authenticate and shall deliver any Securities which previously shall have been signed and delivered by the officers of the Company to the Trustee for authentication, and any Securities which such successor entity thereafter shall cause to be signed and delivered to the Trustee for that purpose. All of the Securities so issued shall in all respects have the same legal rank and benefit under this Indenture as the Securities theretofore or thereafter issued in accordance with the terms of this Indenture as though all of such Securities had been issued at the date of the execution hereof.

In case of any such consolidation, merger, sale, lease or conveyance such changes in phraseology and form (but not in substance) may be made in the Securities thereafter to be issued as may be appropriate.

In the event of any such sale or conveyance (other than a conveyance by way of lease) the Company or any successor entity which shall theretofore have become such in the manner described in this Article shall be discharged from all obligations and covenants under this Indenture and the Securities and may be liquidated and dissolved.

ARTICLE VII.

DEFAULTS AND REMEDIES

“ Event of Default ”, wherever used herein with respect to Securities of any series, and unless otherwise provided with respect to Securities of any series pursuant to Section 301, means any one of the following events (whatever the reason for such Event of Default and whether it shall be voluntary or involuntary or be effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body):

(i) default in the payment of any interest upon any Security of that series when it becomes due and payable, and continuance of such default for a period of 30 days;

(ii) default in the payment of the principal of or any premium on any Security of that series at its Maturity, upon redemption or otherwise;

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

(iv) default in the performance or breach of Article 6;

(v) default in the performance, or breach, of any covenant or warranty of the Company in this Indenture or any Security of such series (other than a covenant 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 continuance of such default or breach for a period of 60 days after there has been given, by registered or certified mail, to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in principal amount of the Outstanding Securities of that series a written notice specifying such default or breach and requiring it to be remedied and stating that such notice is a “Notice of Default” hereunder;

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(vi) the Company pursuant to or within the meaning of any Bankruptcy Law:

(A) commences a voluntary case,

(B) consents to the entry of an order for relief against it in an involuntary case in which it is the debtor,

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

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

(E) admits in writing its inability generally to pay its debts as the same become due;

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

(A) is for relief against the Company in an involuntary case in which it is the debtor,

(B) appoints a custodian of the Company or for all or substantially all of the property of the Company, or

(C) orders the liquidation of the Company, and the order or decree remains unstayed and in effect for 60 days; and

(viii) any other Event of Default provided with respect to Securities of that series pursuant to Section 301.

If an Event of Default with respect to Securities of any series (other than an Event of Default specified in clauses (vi) and (vii) of Section 701) at the time Outstanding occurs and is continuing, then in every such case the Trustee or the Holders of not less than 25% in principal amount of the Outstanding Securities of that series may declare the principal amount of all the Securities of that series (or, if any Securities of that series are Original Issue Discount Securities, such portion of the principal amount of such Securities as may be specified by the terms thereof), premium, if any, and any accrued and unpaid interest on all the Securities of that series to be due and payable immediately, by a notice in writing to the Company (and to the Trustee if given by Holders). Upon such declaration the principal (or specified portion thereof), premium, if any, and interest shall be due and payable immediately. If an Event of Default specified in clause (vi) or (vii) of Section 701 occurs with respect to the Company, such an 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.

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

(i) the Company has paid or deposited with the Trustee a sum sufficient to pay:

(A) all overdue interest on all Securities of that series,

(B) the principal of (and premium, if any, on) any Securities of that series which have become due otherwise than by such declaration of acceleration and any interest thereon at the rate or rates prescribed therefor in such Securities,

(C) to the extent that payment of such interest is lawful, interest upon overdue interest at the rate or rates prescribed therefor in such Securities, and

(D) all sums paid or advanced by the Trustee hereunder and the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel; and

(ii) all Events of Default with respect to Securities of that series, other than the non-payment of the principal of Securities of that series which have become due solely by such declaration of acceleration, have been cured or waived as provided in Section 713.

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

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.

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.

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

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

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

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

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

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

(ii) the Trustee may take any other action deemed proper by the Trustee which is not inconsistent with such direction.

No Holder of any Security of any series 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

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

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

(iii) 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;

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

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

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

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 any premium and (subject to Section 307) interest on such Security on the respective Stated Maturities expressed in such Security (or, in the case of redemption or repayment, on the Redemption Date or date for repayment, as the case may be) and to institute suit for the enforcement of any such payment, and such rights shall not be impaired without the consent of such Holder.

The Company covenants that if:

(i) 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

(ii) default is made in the payment of the principal of (or premium, if any, on) any Security at the Maturity thereof and such default continues for a period of five days,

the Company will, upon demand of the Trustee, pay to it, for the benefit of the Holders of such Securities, the whole amount then due and payable on such Securities for principal and any premium and interest and, to the extent that payment of such interest shall be legally enforceable, interest on any overdue principal and premium 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 an Event of Default with respect to Securities of any series occurs and is continuing, the Trustee may in its discretion proceed to protect and enforce its rights and the rights of the Holders of Securities of such series by such appropriate judicial proceedings as the Trustee shall deem most effectual to protect and enforce any such rights, whether for the specific enforcement of any covenant or agreement in this Indenture or in aid of the exercise of any power granted herein, or to enforce any other proper remedy.

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In case of any judicial proceeding relative to the Company (or any other obligor upon the Securities), its property or its creditors, the Trustee shall be entitled and empowered, by intervention in such proceeding or otherwise, to take any and all actions authorized under the TIA in order to have claims of the Holders and the Trustee allowed in any such proceeding. In particular, the Trustee shall be authorized 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 808.

No provision of this Indenture 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; provided , however , that the Trustee may, on behalf of the Holders, vote for the election of a trustee in bankruptcy or similar official and be a member of a creditors’ or other similar committee.

If the Trustee collects any money with respect to the Securities of any series pursuant to this Article, it shall pay out the money in the following order:

First : to the Trustee, its agents and attorneys for amounts due under Section 808, including payment of all compensation, expenses and liabilities incurred, and all advances made, by the Trustee and the costs and expenses of collection;

Second : to Holders of the Securities of such series for amounts due and unpaid on the Securities of such series for principal, premium, if any, and interest, ratably, without preference or priority of any kind, according to the amounts due and payable on the Securities of such series for principal, premium, if any and interest, respectively;

Third : without duplication, to Holders of the Securities of such series for any other principal, interest, penalties, fees, indemnifications, reimbursements, damages and other liabilities payable under the documentation governing any Indebtedness owing to such Holders under this Indenture or the Securities of such series; and

Fourth : to the Company.

The Trustee may fix a record date and payment date for any payment to Holders.

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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, a court may require any party litigant in such suit to file an undertaking to pay the costs of such suit, and may assess reasonable costs against any such party litigant, in the manner and to the extent provided in the TIA; provided that neither this Section nor the TIA shall be deemed to authorize any court to require such an undertaking or to make such an assessment in any suit instituted by the Company.

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 had been instituted.

No delay or omission of the Trustee or of any Holder of any Securities 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.

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

ARTICLE VIII.

TRUSTEE

(i) With respect to the Securities of any series, if an Event of Default has occurred and is continuing, the Trustee shall exercise such of the rights and powers vested in it by this Indenture, and 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.

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(ii) With respect to the Securities of any series, except during the continuance of an Event of Default actually known to a Responsible Officer of the Trustee:

(A) the duties of the Trustee shall be determined solely by the express provisions of this Indenture or the TIA and the Trustee need perform only those duties that are specifically set forth in this Indenture or the TIA and no others, and no implied covenants or obligations shall be read into this Indenture against the Trustee, and

(B) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture; but in the case of any such certificates or opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine the same to determine whether or not they conform to the requirements of this Indenture (but need not confirm or investigate the accuracy or mathematical calculations or other facts stated therein).

(iii) The Trustee may not be relieved from liabilities for its own negligent action, its own negligent failure to act, or its own willful misconduct, except that:

(A) this paragraph does not limit the effect of paragraph (ii) of this Section;

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

(C) the Trustee shall not be liable with respect to any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 705 hereof.

(iv) Whether or not therein expressly so provided, every provision of this Indenture that in any way relates to the Trustee is subject to paragraphs (i), (ii), and (iii) of this Section.

(v) No provision of this Indenture shall require the Trustee to expend or risk its own funds or incur any liability. The Trustee may refuse to perform any duty or exercise any right or power unless it receives indemnity satisfactory to it against any loss, liability or expense.

(vi) The Trustee shall not be liable for interest on any money received by it except as the Trustee may agree in writing with the Company. Money held in trust by the Trustee need not be segregated from other funds except to the extent required by law.

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(i) The Trustee may conclusively rely upon any document believed by it to be genuine and to have been signed or presented by the proper Person. The Trustee need not investigate any fact or matter stated in any such document.

(ii) Any request or direction of the Company mentioned herein shall be sufficiently evidenced by a Company Request or Company Order or as otherwise expressly provided herein and any resolution of the Board of Directors may be sufficiently evidenced by a Board Resolution.

(iii) Before the Trustee acts or refrains from acting, it may require an Officers’ Certificate or an Opinion of Counsel or both. The Trustee shall not be liable for any action it takes or omits to take in good faith in reliance on such Officers’ Certificate or Opinion of Counsel. The Trustee may consult with counsel of its selection and the advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection from liability in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon.

(iv) The Trustee may act through its attorneys and agents and shall not be responsible nor liable for the misconduct or negligence of any agent appointed with due care.

(v) The Trustee shall not be liable for any action it takes or omits to take in good faith which it believes to be authorized or within its rights or powers conferred upon it by this Indenture.

(vi) Except with respect to Section 501, the Trustee shall have no duty to inquire as to the performance of the Company with respect to the covenants contained in Article V. In addition, the Trustee shall not be deemed to have knowledge of an Event of Default except (a) any default or Event of Default occurring pursuant to Sections 501, 701(i), 701(ii) or 701(iii) or (b) any default or Event of Default of which the Trustee shall have received written notification or obtained actual knowledge.

The Trustee in its individual or any other capacity may become the owner or pledgee of Securities and may otherwise deal with the Company or any Affiliate of the Company with the same rights it would have if it were not Trustee, Authenticating Agent, Paying Agent, Security Registrar or such other agent. Any Agent may do the same with like rights. However, the Trustee is subject to Sections 812 and 813 hereof.

The Trustee and the Authenticating Agent shall not be responsible for and make no representation as to the validity or adequacy of this Indenture or the Securities of any series, nor shall the Trustee or the Authenticating Agent be accountable for the Company’s use of the proceeds from the Securities or any money paid to the Company or upon the Company’s direction under any provision of this Indenture, nor shall it or the Authenticating Agent be responsible for the use or application of any money received by

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any Paying Agent other than the Trustee, nor shall it be responsible for any statement or recital herein or any statement in the Securities of any series or any other document in connection with the sale of the Securities or pursuant to this Indenture other than its certificate of authentication.

If a default or Event of Default with respect to the Securities of any series occurs and is continuing and if it is actually known to a Responsible Officer of the Trustee, the Trustee shall mail to Holders of such Securities a notice of the default or Event of Default within 90 days after it occurs. Except in the case of a default or Event of Default in payment on any Security of any series or in the payment of any sinking fund installment with respect to the Securities of such series, the Trustee may withhold the notice if and so long as a committee of its Responsible Officers in good faith determines that withholding the notice is in the interests of the Holders of Securities of such series.

The Trustee shall preserve, in as current a form as is reasonably practicable, the names and addresses of Holders of such series of Securities received by the Trustee in its capacity as Security Registrar.

Within 60 days after May 15 of each year commencing with the later of May 15, 2008 or the first May 15 after the first issuance of Securities pursuant to this Indenture, the Trustee shall mail to the Holders of Securities of all series a brief report dated as of such reporting date that complies with TIA § 313(a) (but if no event described in TIA § 313(a) has occurred within the twelve months preceding the reporting date, no report need be transmitted). The Trustee also shall comply with TIA § 313(b). The Trustee shall also transmit by mail all reports as required by TIA § 313(c).

A copy of each report at the time of its mailing to the Holders shall be mailed to the Company and filed with the Commission and each stock exchange on which the Securities are listed. The Company shall promptly notify the Trustee when the Securities are listed on any stock exchange or delisted therefrom.

The Company shall pay to the Trustee from time to time such compensation for its acceptance of this Indenture and services hereunder mutually satisfactory to the Company and Trustee. The Trustee’s compensation shall not be limited by any law on compensation of a trustee of an express trust. The Company shall reimburse the Trustee promptly upon request for all disbursements, advances and expenses incurred or made by it in addition to the compensation for its services. Such expenses shall include the reasonable compensation, disbursements and expenses of the Trustee’s agents and counsel.

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The Company shall fully indemnify the Trustee against any and all losses, liabilities, claims, damages or expenses (including taxes other than taxes based on the income of the Trustee) incurred by it arising out of or in connection with the acceptance of its duties and the administration of the trusts under this Indenture, except as set forth below. The Trustee shall notify the Company promptly of any claim for which it may seek indemnity. Failure by the Trustee to so notify the Company shall not relieve the Company of its obligations hereunder. The Company shall defend the claim and the Trustee shall cooperate in the defense. The Trustee may have separate counsel of its own selection and the Company shall pay the reasonable fees and expenses of such counsel. The Company need not pay for any settlement made without the Company’s consent, which consent shall not be unreasonably withheld.

The obligations of the Company under this Section 808 shall survive the satisfaction and discharge of this Indenture.

The Company need not reimburse any expense or indemnify against any loss or liability incurred by the Trustee through its own negligence or willful misconduct.

To secure the Company’s payment obligations in this Section 808, the Trustee shall have a Lien prior to the Securities on all money or property held or collected by the Trustee, except that held in trust to pay principal and interest on the Securities of any series. Such Lien shall survive the satisfaction and discharge of this Indenture.

When the Trustee incurs expenses or renders services after an Event of Default specified in Section 701(vi) or (vii) hereof occurs, the expenses and the compensation for the services (including the fees and expenses of its agents and counsel) are intended to constitute expenses of administration under any Bankruptcy Law.

(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 810.

(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 specifying its intention to resign, the applicable series affected by such resignation, the reason therefor and the date upon which such resignation shall become effective. Notwithstanding the foregoing, unless the reason for such resignation is a conflict pursuant to TIA § 310(b) as provided in Section 812 hereof, the Trustee must resign with respect to all Securities if the Trustee resigns with respect to any series of Securities. If the instrument of acceptance by a successor Trustee required by Section 810 shall not have been delivered to the Trustee within 60 days after the giving of such notice of resignation, the resigning Trustee may petition at the expense of the Company 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.

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(d) If at any time:

(1) the Trustee shall fail to comply with TIA § 310(b) after written request therefor by the Company or by any Holder who has been a bona fide Holder of a Security for at least six months, or

(2) the Trustee shall cease to be eligible under Section 812 and shall fail to resign after written request therefor by the Company or by any such Holder, 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 any one or more series of Securities or all Securities, or (ii) subject to Section 711, 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 such series of 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). 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 810, become the successor Trustee with respect to the Securities of such series and to that extent supersede the successor Trustee appointed by the Company. If no successor Trustee with respect to the Securities of any series shall have been so appointed by the Company or the Holders and accepted appointment in the manner required by Section 810, 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 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.

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(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 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. Whenever there is a successor Trustee with respect to one or more (but less than all) series of securities issued pursuant to this Indenture, the terms “Indenture” and “Securities” shall have the meanings specified in the provisos to the respective definitions of those terms in Section 101 which contemplate such situation.

(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) and (b) of this Section, as the case may be.

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(d) No successor Trustee shall accept its appointment unless at the time of such acceptance such successor Trustee shall be qualified and eligible under this Article.

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; in case any of the Securities shall not have been authenticated by the Trustee then in office, any successor by merger, conversion or consolidation to such Trustee may authenticate such Securities either in the name of such predecessor hereunder or in the name of the successor Trustee; and in all such cases such certificates shall have the full force which it is anywhere in the Securities or in this Indenture provided that the certificate of the Trustee shall have; provided , however , that the right to adopt the certificate of authentication of any predecessor Trustee or to authenticate Securities in the name of any predecessor Trustee shall apply only to its successor or successors by merger, conversion or consolidation.

There shall at all times be a Trustee hereunder which shall be a corporation organized and doing business under the laws of the United States of America or of any state thereof authorized under such laws to exercise corporate trustee power, shall be subject to supervision or examination by Federal or state authority and shall have a combined capital and surplus of at least $50,000,000 as set forth in its most recent published annual report of condition.

This Indenture shall always have a Trustee who satisfies the requirements of TIA § 310(a)(1), (2) and (5). The Trustee is subject to TIA § 310(b).

The Trustee is subject to TIA § 311(a), excluding any creditor relationship listed in TIA § 311(b). A Trustee who has resigned or been removed shall be subject to TIA § 311(a) to the extent indicated therein.

At any time when any of the Securities remain Outstanding the Trustee, with the concurrence of the Company, may appoint an Authenticating Agent or Agents with respect to one or more series of Securities which shall be authorized to act on behalf of the Trustee to authenticate Securities of such series, 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

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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, State or District of Columbia 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 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 anytime 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 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 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 Trustee agrees to pay to each Authenticating Agent from time to time reasonable compensation for its services under this Section, and the Trustee shall be entitled to reimbursement for such payments subject to Section 808.

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

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