Exhibit 4.1

EXECUTION COPY

RADIAN GROUP INC.

SENIOR

INDENTURE

Dated as of June 7, 2005

Providing for Issuance of Senior Debt Securities in Series

WELLS FARGO BANK, NATIONAL ASSOCIATION,

as Trustee

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Reconciliation and Tie Between the Trust Indenture Act of 1939 and Indenture dated as of June 7, 2005, between Radian Group Inc. and Wells Fargo Bank, National Association, as Trustee

INDENTURE dated as of June 7, 2005 between Radian Group Inc., a Delaware corporation, and Wells Fargo Bank, National Association, as Trustee.

The Company has duly authorized the execution and delivery of this Indenture to provide for the issuance from time to time of its secured or unsecured debentures, notes, bonds or other evidences of indebtedness (“ Securities ”) to be issued in one or more series as herein provided.

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

For and in consideration of the premises and the purchase of the Securities by the Holders thereof, it is mutually covenanted and agreed as follows for the equal and ratable benefit of the Holders of the Securities:

ARTICLE 1.

DEFINITIONS AND INCORPORATION

BY REFERENCE

“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, means 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 Registrar or Paying Agent.

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

“Board” or “Board of Directors” means the Board of Directors of the Company or any authorized committee of the Board of Directors.

“Board Resolution” means a resolution of the Board of Directors.

“Business Day” means any day other than a Saturday, a Sunday or a day on which banking institutions in the City of New York or at a place of payment are authorized by law, regulation or executive order to remain closed.

“Capital Lease Obligation” means, at the time any determination thereof is to be made, the amount of the liability in respect of a capital lease that would at such time be required to be capitalized on a balance sheet in accordance with GAAP.

“Clearstream” means Clearstream Banking, société anonyme (or any successor securities clearing agency).

“Code” means the Internal Revenue Code of 1986, as amended.

“Common Stock” means the Company’s Common Stock, par value $0.001 per share.

“Company” means Radian Group Inc., a Delaware corporation, and any and all successors thereto.

“Conversion Notice” means a notice, substantially in the form attached hereto as Exhibit B, given by a Holder irrevocably exercising its option to convert some or all of its Securities.

“Custodian” means the Trustee, as custodian with respect to Securities in global form, or any successor entity thereto.

“Default” means any event that is, or with the passage of time or the giving of notice or both would be, an Event of Default.

“Depositary” means, with respect to any series of Securities issuable or issued in whole or in part in global form, the Person specified in Section 2.06 hereof as the Depositary with respect to the Global Securities of that series, and any and all successors thereto registered and in good standing as a clearing agency under the Exchange Act, appointed as depositary hereunder and having become such pursuant to the applicable provision of this Indenture.

“Euroclear” means Euroclear Bank S.A./N.V., as operator of the Euroclear system (or any successor securities clearing agency).

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

“GAAP” means United States generally accepted accounting principles, consistently applied.

“Global Securities” means, individually and collectively, the Securities issued in global form issued in accordance with Sections 2.01 and 2.09 hereof.

“Hedging Obligations” means, with respect to any Person, the obligations of such Person under (i) interest rate swap agreements, interest rate cap agreements and interest rate collar agreements and (ii) other agreements or arrangements designed to protect such Person against fluctuations in interest rates.

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

“Indebtedness” means, with respect to any Person: (i) the principal of, and any premium, if any, and interest on, indebtedness of any such Person for money borrowed and indebtedness evidenced by notes, debentures, bonds or other similar instruments for the payment of which that such Person is responsible or liable; (ii) all Capital Lease Obligations of such Person; (iii) all obligations of such Person issued or assumed as the deferred purchase price of property, all conditional sale obligations and all obligations under any title retention agreement (but excluding

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trade accounts payable arising in the ordinary course of business and deferred purchase price due and payable within 90 days); (iv) all obligations of such Person for the reimbursement of any obligor on any letter of credit, banker’s acceptance or similar credit transaction, other than obligations with respect to letters of credit securing obligations entered into in the ordinary course of business; (v) all Hedging Obligations of such Person; (vi) all obligations of the type referred to above of other Persons and all dividends of other Persons for which (and to the extent that) such Person is responsible or liable as obligor, guarantor or otherwise; (vii) all obligations of the type referred to above of other Persons to the extent secured by any Lien on any property or asset of that Person; and (viii) any amendments, modifications, refundings, renewals or extensions of any indebtedness or obligation described above.

“Indenture” means this Subordinated Indenture, as amended, restated, waived or supplemented from time to time and includes and incorporates by reference the forms and terms of particular series of Securities established as contemplated hereunder.

“Indirect Participant” means a Person who holds a beneficial interest in a Global Security through a Participant.

“Interest Payment Date” means each of December 15 and June 15, unless otherwise provided in Section 2.02.

“Obligations” means any principal, interest, penalties, fees, indemnifications, reimbursements, damages and other liabilities payable under this Indenture or the applicable Securities.

“Officer” means, with respect to any Person, the Chairman of the Board, the Chief Executive Officer, the President, the Chief Operating Officer, the Chief Financial Officer, Vice Chairman of the Board, the Treasurer, any Assistant Treasurer, the Controller, the Secretary, any Assistant Secretary, any Vice President or any Assistant Vice President of such Person.

“Officers’ Certificate” means a certificate signed on behalf of the Company by two Officers of the Company, one of whom must be the principal executive officer, the president, the principal financial officer, the treasurer or any vice president of the Company, that meets the requirements of Section 14.05 hereof.

“Opinion of Counsel” means an opinion from legal counsel that meets the requirements of Section 14.05 hereof. The counsel may be an employee of or counsel to the Company, any Subsidiary of the Company or the Trustee.

“Participant” means, with respect to the Depositary, Euroclear or Clearstream, a Person who has an account with the Depositary, Euroclear or Clearstream.

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

“Regular Record Date” for the interest payable on the Securities means every December 1 and June 1, unless otherwise provided in Section 2.02 (whether or not a Business Day), as applicable, next preceding the corresponding Interest Payment Date.

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“ Responsible Officer” when used with respect to the Trustee, means any officer within the applicable trust services department of the Trustee (or any successor group of the Trustee) or any other officer of the Trustee customarily performing functions similar to those performed by any of the above designated officers, in each case, who is the officer responsible for the administration of this Indenture, and also means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his or her knowledge of and familiarity with the particular subject.

“SEC” means the Securities and Exchange Commission.

“Securities” has the meaning assigned to it in the preamble to this Indenture.

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

“Stated Maturity” means, with respect to any payment of interest or principal on any series of Securities, the date on which such payment of interest or principal is scheduled to be paid thereon by its terms as in effect from time to time, and does not include any contingent obligation to repay, redeem or repurchase any such interest or principal prior to the date scheduled for the payment thereof, provided, however, that, if any such date is not a Business Day, the payment will be made on the next succeeding Business Day.

“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 or other equity interests 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 such Person (or a combination thereof) and (ii) any partnership (a) the sole general partner or the managing general partner of which is such a Person or a Subsidiary of such Person or (b) the only general partners of which are such Person or one or more Subsidiaries of such Person (or any combination thereof.)

“TIA” means the Trust Indenture Act of 1939 (15 U.S.C. §§ 77aaa-77bbbb as amended) as in effect on the date on which this Indenture is qualified under the TIA; provided, however, that if the TIA is amended after such date, “TIA” means, to the extent required by any such amendment, the TIA as so amended.

“Trustee” means the party named as such above until a successor replaces it in accordance with the applicable provisions of this Indenture and thereafter means the successor serving hereunder.

“U.S. Government Obligations” means securities that are (i) direct obligations of the United States of America for the payment of which its full faith and credit is pledged or (ii) obligations of a Person controlled or supervised by and acting as an agency or instrumentality of the United States of America the payment of which is unconditionally guaranteed as a full faith and credit obligation by the United States of America, which, in either case under clauses (i) or (ii), are not callable or redeemable at the option of the issuer thereof, and also includes a depository receipt issued by a bank or trust company as custodian with respect to any such U.S. Government Obligation or a specific payment of interest on or principal of any such U.S. Government Obligation held by such custodian for the account of the holder of a depository receipt, provided

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that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such depository receipt from any amount received by the custodian in respect of the U.S. Government Obligation or the specific payment of interest on or principal of the U.S. Government Obligation evidenced by such depository receipt.

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 security holder ” means a Holder of a Security;

“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 SEC rule under the TIA and not otherwise defined herein have the meanings so assigned to them.

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For the purposes of this Indenture, unless the context otherwise requires:

(1) a term has the meaning assigned to it;

(2) an accounting term not otherwise defined has the meaning assigned to it in accordance with United States generally accepted accounting principles;

(3) “or” is not exclusive;

(4) words in the singular include the plural, and in the plural include the singular;

(5) provisions apply to successive events and transactions; and

(6) references to sections of or rules under the Securities Act and the Exchange Act shall be deemed to include substitute, replacement and successor sections thereof or rules adopted by the SEC from time to time.

Any request, demand, authorization, direction, notice, consent, waiver or other action provided or permitted by this Indenture to be given or taken by Holders may be embodied in and evidenced by one or more instruments of substantially similar tenor signed by such Holders, in person or by an agent duly appointed in writing or may be embodied in and evidenced by the record of Holders voting in favor thereof, either in person or by proxies duly appointed in writing, at any meeting of Holders duly called and held in accordance with the provisions of Article 11, or a combination of such instruments or record and, except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments or record or both are delivered to the Trustee and, where it is hereby expressly required, to the Company. Such instrument or instruments and any such record (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the “Act” of Holders signing such instrument or instruments and so voting at any such meeting. Proof of execution of any such instrument or of a writing appointing any such agent or proxy shall be sufficient for any purpose of this Indenture and conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section and Section 11.05. The record of any meeting of Holders shall be proved in the manner provided in Section 11.05.

Without limiting the generality of this Section, unless otherwise provided in or pursuant to this Indenture, 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 in or pursuant to this Indenture to be made, given or taken by Holders, and a Depositary that is a Holder of a Global Security may provide its proxy or proxies to the beneficial owners of interests in any such Global Security through such Depositary’s standing instructions and customary practices.

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The fact and date of the execution by any Person of any such instrument or writing may be proved in any manner which the Trustee deems sufficient.

The ownership of Securities shall be proved by the Register.

ARTICLE 2.

THE SECURITIES

(a) General. The Securities of each series shall be in substantially such form as shall be established by, or by action taken pursuant to, a Board Resolution or in 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 applicable securities exchange, organizational document, governing instrument or law or as may, consistently herewith, be determined by the officers executing such Securities as evidenced by their execution of the Securities. If temporary Securities of any series are issued as permitted by Section 2.12, the form thereof also shall be established as provided in the preceding sentence. If the forms of Securities of any series are established by, or by action taken pursuant to, a Board Resolution, a copy of the Board Resolution, certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors and to be in full force and effect on the date of the certificate, together with an appropriate record of any such action taken pursuant thereto, including a copy of the approved form of Securities, shall be delivered to the Trustee at or prior to the delivery of the Authentication Order contemplated by Section 2.05 or 2.12, as applicable, for the authentication and delivery 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 described in the within-mentioned Indenture.

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If the Trustee has designated an authenticating agent pursuant to Section 2.05 and the authenticating agent is authenticating any Security, then the Trustee’s certificate of authentication shall be in substantially the following form:

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

(b) Global Securities. If Securities of or within a series are issuable in whole or in part in global form, any such Security may provide that it shall represent the aggregate or a specified amount of Outstanding Securities from time to time endorsed thereon and may also provide that the aggregate amount of Outstanding Securities represented thereby may from time to time be reduced or increased to reflect exchanges and conversions. Any endorsement of a Security in global form to reflect the amount, or any increase or decrease in the amount, or changes in the rights of Holders, of Outstanding Securities represented thereby, will be made in such manner and by such Person or Persons as shall be specified therein or upon the written order of the Company signed by an Officer to be delivered to the Trustee pursuant to Section 2.05 or 2.12. Subject to the provisions of Section 2.05, Section 2.12, if applicable, and Section 2.09, the Trustee shall deliver and redeliver any Security in permanent global form in the manner and upon instructions given by the Person or Persons specified therein or in the applicable written order of the Company signed by an Officer. Any instructions by the Company with respect to endorsement or delivery or redelivery of a Security in global form shall be in writing.

The provisions of the last paragraph of Section 2.05 shall apply to any Security in global form if such Security was authenticated and delivered as contemplated herein, but never issued and sold by the Company.

Notwithstanding the provisions of this Section 2.01, unless otherwise specified as contemplated by Section 2.02, payment of principal of, premium, if any, and interest on any Security in permanent global form shall be made to the Holder thereof.

(a) The aggregate principal amount of Securities which may be authenticated and delivered under this Indenture is unlimited. The Securities may be issued from time to time in one or more series.

(b) The following matters will be established with respect to each series of Securities issued hereunder (i) by a Board Resolution, (ii) by action taken pursuant to a Board Resolution and set forth, or determined in the manner provided, in an Officers’ Certificate or (iii) in one or more indentures supplemental hereto:

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

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(2) any limit upon the aggregate principal amount of the Securities of the series which may be authenticated and delivered under this Indenture (which limit will not pertain to Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities of the series pursuant to Section 2.09, 2.10, 2.12, 3.06 or 10.05 or any Securities that, pursuant to Section 2.05, are deemed never to have been authenticated and delivered hereunder);

(3) the date or dates on which the principal of and premium, if any, on the Securities of the series is payable or the method or methods of determination thereof;

(4) the rate or rates at which the Securities of the series will bear interest, if any, or the method or methods of calculating such rate or rates of interest, the date or dates from which such interest will accrue or the method or methods by which such date or dates will be determined, the Interest Payment Dates on which any such interest will be payable, the right, if any, of the Company to defer or extend an Interest Payment Date, the record date, if any, for the interest payable on any Security on any Interest Payment Date, and the basis upon which interest will be calculated if other than that of a 360-day year of twelve 30-day months;

(5) the place or places where the principal of, premium, if any, and interest, if any, on Securities of the series will be payable pursuant to Section 2.06, any Securities of the series may be surrendered for registration of transfer pursuant to Section 2.06, Securities of the series may be surrendered for exchange pursuant to Section 2.06 and notices and demands to or upon the Company in respect of the Securities of the series and this Indenture may be served and notices to Holders pursuant to Section 11.02 will be published;

(6) the period or periods within which, the price or prices at which, the currency or currencies (including currency unit or units) in which, and the other terms and conditions upon which, Securities of the series may be redeemed, in whole or in part, at the option of the Company and, if other than as provided in Section 3.03, the manner in which the particular Securities of such series (if less than all Securities of such series are to be redeemed) are to be selected for redemption;

(7) the obligation, if any, of the Company to redeem or purchase Securities of the series pursuant to any sinking fund or analogous provisions or upon the happening of a specified event or at the option of a Holder thereof and the period or periods within which, the price or prices at which, the currency or currencies (including currency unit or units) in which, and the other terms and conditions upon which, Securities of the series will be redeemed or purchased, in whole or in part, pursuant to such obligation;

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

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(9) if other than U.S. dollars, the currency or currencies (including currency unit or units) in which the principal of, premium, if any, and interest, if any, on the Securities of the series will be payable, or in which the Securities of the series will be denominated, and the particular provisions applicable thereto;

(10) if the payments of principal of, premium, if any, or interest, if any, on the Securities of the series are to be made, at the election of the Company or a Holder, in a currency or currencies (including currency unit or units) other than that in which such Securities are denominated or designated to be payable, the currency or currencies (including currency unit or units) in which such payments are to be made, the terms and conditions of such payments and the manner in which the exchange rate with respect to such payments will be determined, and the particular provisions applicable thereto;

(11) if the amount of payments of principal of, premium, if any, and interest, if any, on the Securities of the series will be determined with reference to an index, formula or other method (which index, formula or method may be based, without limitation, on a currency or currencies (including currency unit or units) other than that in which the Securities of the series are denominated or designated to be payable), the index, formula or other method by which such amounts will be determined and any special voting or defeasance provisions in connection therewith;

(12) if other than the principal amount thereof, the portion of the principal amount of such Securities of the series which will be payable upon declaration of acceleration thereof pursuant to Section 6.02 or the method by which such portion will be determined;

(13) the Person to whom any interest on any Security of the series will be payable;

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

(15) any deletions from, modifications of or additions to the Events of Default set forth in Section 6.01 or covenants of the Company set forth in Article 4 pertaining to the Securities of the series;

(16) under what circumstances, if any, and with what procedures and documentation the Company will pay additional amounts on the Securities of that series held by a Person who is not a U.S. Person (including any definition of such term) in respect of taxes, assessments or similar charges withheld or deducted and, if so, whether the Company has the option to redeem such Securities rather than pay such additional amounts (and the terms of any such option);

(17) the forms of the Securities of the series;

(18) the applicability, if any, of Sections 9.02 and 9.03 to the Securities of the series or such other means of defeasance or covenant defeasance as may be specified for the Securities of such series;

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(19) if other than the Trustee, the identity of the Registrar, Conversion Agent (if any) and any Paying Agent pursuant to Section 2.06;

(20) if the Securities of the series will be issued in whole or in part in global form, (A) the Depositary for such Global Securities, (B) whether beneficial owners of interests in any Securities of the series in global form may exchange such interests for certificated Securities of such series, to be registered in the names of or to be held by such beneficial owners or their nominees and to be of like tenor of any authorized form and denomination, and (C) if other than as provided in Section 2.09, the circumstances under which any such exchange may occur;

(21) the designation of the Depositary with respect to the Securities of the series pursuant to Section 2.06;

(22) any restrictions on the registration, transfer or exchange of the Securities of the series;

(23) if the Securities of the series may be issued or delivered (whether upon original issuance or upon exchange of a temporary Security of such series or otherwise), or any installment of principal or interest is payable, only upon receipt of certain certificates or other documents or satisfaction of other conditions in addition to those specified in this Indenture, the form and terms of such certificates, documents or conditions;

(24) if the Securities of the series will be convertible into or for other securities or property of the Company, and any deletions from, modifications of or additions to the terms and conditions of any right to convert or exchange Securities of the series into or for other securities or property of the Company set forth in Article 12;

(25) whether the Securities of the series are secured or unsecured, and if secured, the security and related terms in connection therewith (which will be provided for in a separate security agreement and/or other appropriate documentation); and

(26) any other terms of the series (which terms will not be inconsistent with the provisions of this Indenture) including any terms which may be required by or advisable under United States laws or regulations or advisable (as determined by the Company) in connection with the marketing of Securities of the series.

(c) All Securities of any one series will be substantially identical except as to denomination and except as may otherwise be provided (i) by a Board Resolution, (ii) by action taken pursuant to a Board Resolution and set forth, or determined in the manner provided, in the related Officers’ Certificate or (iii) in an indenture supplemental hereto. All Securities of any one series need not be issued at the same time and, unless otherwise provided, a series may be reopened, without the consent of the Holders, for issuances of additional Securities of such series.

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Except as otherwise specified in any Security issued hereunder, or in any supplemental indenture, interest shall be due and payable on a Security as follows:

(a) A Holder as of the close of business on a Regular Record Date shall be entitled to receive and shall receive (except as otherwise indicated in this Section 2.03), accrued and unpaid interest on such Security from the date specified in such Security to the Interest Payment Date next succeeding such Regular Record Date, other than any Security whose Stated Maturity is prior to such Interest Payment Date.

(b) In the event that a Security of any series becomes subject to redemption pursuant to Article 3 and the redemption date occurs after a Regular Record Date but on or prior to the next succeeding Interest Payment Date, the person whose Security becomes subject to redemption (and only such Person rather than the Holder as of such Regular Record Date) shall be entitled to receive and shall receive accrued and unpaid interest from the preceding Interest Payment Date (or such earlier date on which interest was last paid) to, but excluding, the redemption date of such Security, even if such Person is not the Holder of such Security on the Regular Record Date. In the event that a Security of any series becomes subject to redemption pursuant to Article 3 and the redemption date occurs on an Interest Payment Date, the Holder as of the Regular Record Date corresponding to such Interest Payment Date shall be entitled to receive and shall receive accrued and unpaid interest from the preceding Interest Payment Date (or such earlier date on which interest was last paid or as otherwise provided in the Security) to, but excluding, the redemption date of such Security, even if such Person is not the Holder of such Security.

(c) In the event that Securities of any series are convertible and if, in such case, a Security is converted pursuant to Article 12, the Holder who converts such Security on any date other than an Interest Payment Date (except in the case of a Security whose Stated Maturity is after the immediately preceding Record Date but prior to such Interest Payment Date) shall not be entitled to receive unpaid interest on such Security from the preceding Interest Payment Date until the Conversion Date, such amounts being deemed to have been paid by receipt of shares of Common Stock in full rather than canceled, extinguished or forfeited. As a result, if a Security is converted between a Regular Record Date and an Interest Payment Date (but not including on the Interest Payment Date), the Holder of record on the Regular Record Date will receive accrued and unpaid interest on such Security for such period on such Interest Payment Date but the Holder which converts the Security will be required to remit to the Company an amount equal to that interest at the time such Holder surrenders the Security for conversion, pursuant to Article 12; provided, however, that such Holder will not be required to remit such interest if (1) the Company has specified a redemption date that occurs during the period from the close of business on a Regular Record Date to the close of business on the Business Day immediately preceding the Interest Payment Date to which such record date relates or (2) any overdue interest exists on the Conversion Date with respect to the Securities converted, but only to the extent of overdue interest.

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Unless otherwise specified in any Security issued hereunder or in any supplemental indenture, Securities of a series denominated in Dollars shall be issuable in denominations of U.S. $1,000 and any integral multiple thereof. Securities denominated in a foreign currency shall be issuable in such denominations as are established with respect to such Securities in or pursuant to this Indenture.

An Officer shall sign the Securities for the Company by manual or facsimile signature.

If an Officer whose signature is on a Security no longer holds that office at the time a Security is authenticated, the Security shall nevertheless be valid.

A Security shall not be valid until authenticated by the manual signature of the Trustee (or its authenticating agent as provided below). The signature shall be conclusive evidence that the Security has been authenticated under this Indenture.

The Trustee shall, upon a written order of the Company signed by an Officer (an “ Authentication Order ”), together with an Officers’ Certificate and an Opinion of Counsel, authenticate Securities for original issue in the aggregate principal amount stated in the Authentication Order. The Officers’ Certificate and Opinion of Counsel shall each state that all conditions precedent provided for or relating to the issuance of such Securities have been complied with.

If all of the Securities of a series are not to be originally issued at the same time, then the documents required to be delivered pursuant to this Section 2.05 must be delivered only once, prior to the authentication and delivery of the first Security of such series; provided, however, that any subsequent request by the Company to the Trustee to authenticate additional Securities of such series upon original issuance shall constitute a representation and warranty by the Company that, as of the date of such request, the statements made in the Officers’ Certificate delivered pursuant to this Section 2.05 shall be true and correct as if made on such date and that all the conditions precedent, if any, provided for in this Indenture or the terms of the Securities of such series relating to the authentication and delivery of additional Securities of such series have been complied with.

The Trustee may appoint an authenticating agent acceptable to the Company to authenticate Securities. An authenticating agent may authenticate Securities whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. An authenticating agent has the same rights as an Agent to deal with Holders or an Affiliate of the Company.

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 2.13 together with a written statement stating that such Security has never been issued and sold by the Company, for all purposes of this Indenture such Security shall be deemed never to have been authenticated and delivered hereunder and shall not be entitled to the benefits of this Indenture.

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The Company shall, in accordance with Section 4.02, maintain an office or agency where Securities may be presented for registration of transfer or for exchange (“ Registrar ”), (if Securities of any series are convertible) an office or agency where Securities may be presented for conversion (“ Conversion Agent ”), and an office or agency where Securities may be presented for payment (“ Paying Agent ”). The Registrar shall keep a register of the Securities and of their transfer and exchange. The Company may appoint one or more co-registrars, one or more additional paying agents and one or more Conversion Agents. The term “ Registrar ” includes any co-registrar, the term “ Paying Agent ” includes any additional paying agent and the term “Conversion Agent” includes any additional Conversion Agent. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company shall promptly notify the Trustee in writing of the name and address of any Agent not a party to this Indenture. If the Company fails to appoint or maintain another entity as Registrar or Paying Agent or, if the Securities of any series are convertible, a Conversion Agent, the Trustee shall act as such. The Company or any of its Subsidiaries may act as Paying Agent, Conversion Agent or Registrar.

The Company initially appoints The Depository Trust Company to act as Depositary with respect to the Global Securities.

The Company initially appoints the Trustee to act as the Registrar and Paying Agent with respect to the Securities and to act as Custodian with respect to the Global Securities.

The Company shall require each Paying Agent other than the Trustee to agree in writing that the Paying Agent will hold in trust for the benefit of Holders or the Trustee all money held by the Paying Agent for the payment of principal, premium, if any, or interest on the Securities or other payment in respect of the Securities or otherwise held by it as Paying Agent, and will notify the Trustee of any default by the Company in making any such payment when due. While any such default continues, the Trustee may require a Paying Agent to pay all money held by it to the Trustee. The Company at any time may require a Paying Agent to pay all money held by it to the Trustee. Upon payment over to the Trustee, the Paying Agent (if other than the Company or a Subsidiary) shall have no further liability for the money. If the Company or a Subsidiary acts as Paying Agent, it shall segregate and hold in a separate trust fund for the benefit of the Holders all money held by it as Paying Agent. Upon any bankruptcy or reorganization proceedings relating to the Company, the Trustee shall serve as Paying Agent for the Securities.

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The Trustee shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of all Holders and shall otherwise comply with TIA §312(a). If the Trustee is not the Registrar, the Company shall, or shall cause the Registrar to, furnish to the Trustee at least seven Business Days before each Interest Payment Date and at such other times as the Trustee may request in writing, a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of the Holders of Securities, and the Company shall otherwise comply with TIA §312(a).

(a) Upon surrender for registration of transfer of any certificated Security of any series at the office or agency maintained pursuant to Section 4.02, the Company shall execute, and the Trustee shall authenticate and deliver, in the name of the designated transferee or transferees, one or more new certificated Securities of the same series, of any authorized denominations and of a same aggregate principal amount and like tenor and containing identical terms and provisions.

(b) At the option of the Holder, Securities of any series (except a Security in global form) may be exchanged for other Securities of the same series, of any authorized denominations, of a same aggregate principal amount and like tenor and containing identical terms and provisions, upon surrender of the Securities to be exchanged at such office or agency. Whenever any Securities are so surrendered for exchange, the Company shall execute, and the Trustee shall authenticate and deliver, the Securities which the Holder making the exchange is entitled to receive.

(c) Notwithstanding any other provision of this Section, unless and until it is exchanged in whole or in part for Securities in certificated form, a Security in global form representing all or a portion of the Securities of a series may not be transferred except as a whole by the Depositary for such series to a nominee of such Depositary or by a nominee of such Depositary to such Depositary or another nominee of such Depositary or by such Depositary or any such nominee to a successor Depositary for such series or a nominee of such successor Depositary.

(d) If at any time the Depositary for the Securities of a series notifies the Company that it is unwilling or unable to continue as Depositary for the Securities of such series or if at any time the Depositary for the Securities of such series shall no longer be registered and in good standing as a clearing agency under the Exchange Act, the Company shall appoint a successor Depositary with respect to the Securities of such series. If a successor Depositary for the Securities of such series is not appointed by the Company prior to the resignation of the Depositary and, in any event, within 90 days after the Company receives such notice or becomes aware of such ineligibility, the Company’s designation of the Depositary pursuant to Section 2.02(b)(21) shall no longer be effective with respect to the Securities of such series and the Company shall execute, and the Trustee, upon receipt of an Authentication Order for the authentication and delivery of certificated Securities of such series of like tenor, shall authenticate and deliver, Securities of such series of like tenor in certificated form, in authorized

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denominations and in an aggregate principal amount equal to the principal amount of the Security or Securities of such series of like tenor in global form in exchange for such Security or Securities in global form.

(e) The Company may at any time in its sole discretion determine that all (but not less than all) Securities of a series issued in global form shall no longer be represented by such a Security or Securities in global form. In such event the Company shall execute, and the Trustee, upon receipt of an Authentication Order for the authentication and delivery of certificated Securities of such series of like tenor, shall authenticate and deliver in accordance with Section 2.02(g), Securities of such series of like tenor in certificated form, in authorized denominations and in an aggregate principal amount equal to the principal amount of the Security or Securities of such series of like tenor in global form in exchange for such Security or Securities in global form.

(f) If specified by the Company pursuant to Section 2.02 with respect to a series of Securities, the Depositary for such series may surrender a Security in global form of such series in exchange in whole or in part for Securities of such series in certificated form on such terms as are acceptable to the Company and such Depositary. Thereupon, the Company shall execute, and the Trustee shall authenticate and deliver, without service charge,

(g) Upon the exchange of a Security in global form for Securities in certificated form, such Security in global form shall be canceled by the Trustee. Securities in certificated form issued in exchange for a Security in global form pursuant to this Section shall be registered in such names and in such authorized denominations as the Depositary for such Security in global form, pursuant to instructions from its direct or Indirect Participants or otherwise, shall instruct the Trustee in writing. The Trustee shall deliver such Securities to the Persons in whose names such Securities are so registered.

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

(i) All Securities issued upon any registration of transfer or upon any 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 were the Securities surrendered upon such registration of transfer or exchange.

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

(k) No service charge shall be made for any registration of transfer or for any 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 or transfer or exchange of Securities, other than exchanges pursuant to Section 2.13 or 3.06 not involving any transfer.

(l) The Company 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 3.02 and ending at the close of business on the day of such mailing, or (ii) to register the transfer of or exchange any security so selected for redemption in whole or in part, except the unredeemed portion of any Security being redeemed in part.

(m) The provisions of this Section 2.09 may be modified, supplemented or superseded with respect to any series of Securities by a Board Resolution or in one or more indentures supplemental hereto.

(n) The following legend shall appear on the face of all Global Securities unless specifically stated otherwise in the applicable provision of this Indenture:

“THIS GLOBAL SECURITY IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE GOVERNING THIS SECURITY) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND, UNLESS AND UNTIL IT IS EXCHANGED FOR SECURITIES IN DEFINITIVE FORM IN ACCORDANCE WITH THE INDENTURE, (I) IS NOT TRANSFERABLE EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY, OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY, OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR SUCCESSOR NOMINEE, AND (II) MAY NOT BE EXCHANGED OR CANCELLED EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.”

(o) At such time as all beneficial interests in a particular Global Security have been exchanged for definitive Securities or a particular Global Security has been redeemed, repurchased or canceled in whole and not in part, each such Global Security shall be returned to or retained and canceled by the Trustee in accordance with Section 2.14 hereof. At any time prior to such cancellation, if any beneficial interest in a Global Security is exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Security or for definitive Securities, the principal amount of Securities represented by such Global Security shall be reduced accordingly and an endorsement shall be

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made on such Global Security by the Trustee or by the Depositary at the direction of the Trustee to reflect such reduction; and if the beneficial interest is being exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Security, such other Global Security shall be increased accordingly and an endorsement shall be made on such Global Security by the Trustee or by the Depositary at the direction of the Trustee to reflect such increase.

(p) Prior to due presentment for the registration of a transfer of any Security, the Trustee, any Agent and the Company may deem and treat the Person in whose name any Security is registered as the absolute owner of such Security for the purpose of receiving payment of principal of and interest on such Securities and for all other purposes, and neither the Trustee, any Agent nor the Company shall be affected by notice to the contrary. 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 any Depositary, as a Holder, with respect to such Global Security or impair, as between such Depositary and owners of beneficial interests in such Global Security, the operation of customary practices governing the exercise of the rights of such Depositary (or its nominee) as Holder of such Global Security.

Section 2.10. REPLACEMENT SECURITIES.

If any mutilated Security is surrendered to the Trustee or the Company or the Trustee receives evidence to its satisfaction of the destruction, loss or theft of any Security, the Company shall issue and the Trustee, upon receipt of an Authentication Order, shall authenticate a replacement Security , provided that if required by the Trustee or the Company, an indemnity bond must be supplied by the Holder that is sufficient in the judgment of the Trustee and the Company to protect the Company, the Trustee, any Agent and any authenticating agent from any loss that any of them may suffer if a Security is replaced. The Company may charge for its expenses in replacing a Security.

Every replacement Security is an obligation of the Company and will be entitled to all of the benefits of this Indenture equally and proportionately with all other Securities duly issued hereunder.

Section 2.11. OUTSTANDING SECURITIES.

For purposes of this Indenture and the Securities, except as otherwise specified in any Security of any series or supplemental indenture, any Security authenticated and delivered under this Indenture, shall, as of any date of determination, be deemed to be “Outstanding” except:

(1) Securities theretofore cancelled by the Trustee or delivered to the Trustee for cancellation or reductions in the interest in any Global Security effected by the Trustee in accordance with the provision hereof;

(2) Securities for the payment or redemption of which money or U.S. Government Obligations 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

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Company (if the Company acts as its own Paying Agent) for the Holders of such Securities; provided, however, that, if such Securities are to be redeemed, notice of such redemption has been duly given pursuant to this Indenture or provision therefore satisfactory to the Trustee has been made;

(3) Securities which have been paid pursuant to Section 4.01; and

(4) Securities that have been replaced pursuant to Section 2.10, 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 protected purchaser (as defined in Article 8 of the Uniform Commercial Code as in effect from time to time in the State of New York) 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 or concurred with any request, demand, authorization, direction, notice, consent or waiver hereunder, 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, for purposes of determining whether the Trustee shall be protected in relying upon any such request, demand, authorization, direction, notice, consent or waiver, only Securities which the Trustee knows to be so owned shall be so disregarded. Securities so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Securities and that the pledgee is not the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor.

Section 2.12. TEMPORARY SECURITIES.

Until certificates representing Securities are ready for delivery, the Company may prepare and the Trustee, upon receipt of an Authentication Order, shall authenticate temporary Securities. Temporary Securities shall be substantially in the form of certificated Securities but may have variations that the Company considers appropriate for temporary Securities and as shall be reasonably acceptable to the Trustee. Without unreasonable delay, the Company shall prepare and the Trustee shall authenticate definitive Securities in exchange for temporary Securities.

Holders of temporary Securities will be entitled to all of the benefits of this Indenture.

Section 2.13. CANCELLATION.

The Company at any time may deliver Securities to the Trustee for cancellation. The Registrar, Paying Agent and Conversion Agent shall forward to the Trustee any Securities surrendered to them for registration of transfer, exchange, conversion or payment. The Trustee and no one else shall cancel all Securities surrendered for registration of transfer, exchange, conversion, payment, replacement or cancellation and shall destroy canceled Securities (subject to the record retention requirement of the Exchange Act). Certification of the destruction of all canceled Securities shall be delivered to the Company. The Company may not issue new Securities to replace Securities that it has paid or that have been delivered to the Trustee for cancellation.

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Section 2.14. DEFAULTED INTEREST.

If the Company defaults in a payment of interest on the Securities, it shall pay the defaulted interest in any lawful manner to the Persons who are Holders on a subsequent special record date, in each case at the rate provided in the Securities. The Company shall notify the Trustee in writing of the amount of defaulted interest proposed to be paid on each Security and the date of the proposed payment. The Company shall fix or cause to be fixed each such special record date and payment date, provided, however, that no such special record date shall be less than 10 days prior to the related payment date for such defaulted interest. At least 15 days before the special record date, the Company (or, upon the written request of the Company, the Trustee in the name and at the expense of the Company) shall mail or cause to be mailed to Holders a notice that states the special record date, the related payment date and the amount of such interest to be paid. Except as otherwise expressly provided in Section 2.03 or 13.02, in the case of any Security (or any part thereof) which is converted, interest payable on an Interest Payment Date after the date of conversion of such Security (or such part thereof) shall not be payable. 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. The provisions of this Section 2.14 may be modified in the Securities of any series issued hereunder or by supplemental indenture.

ARTICLE 3.

REDEMPTION AND PREPAYMENT

Section 3.01. APPLICABILITY OF ARTICLE.

The provisions of this Article are applicable to the Securities of any series which are redeemable before their maturity except as otherwise specified as contemplated by Section 2.02 for Securities of such series or in any supplemental indenture.

Section 3.02. SELECTION OF SECURITIES TO BE REDEEMED.

If less than all of the Securities of any series are to be redeemed at any time, the Trustee will select the Securities of such series to be redeemed among the Holders of the Securities of such series in compliance with the requirements of the principal national securities exchange, if any, on which the Securities of such series are listed or, if the Securities of such series are not so listed, to be redeemed among the Holders of Securities of such series on a pro rata basis, by lot or by such other method as the Trustee deems fair and appropriate; provided, however, that no Securities of $1,000 or less shall be redeemed in part. In the event of partial redemption by lot, the particular Securities of such series to be redeemed shall be selected, unless otherwise provided herein or in the Securities of such series or in a supplemental indenture or otherwise agreed by the Company and the Trustee, by the Trustee from the Outstanding Securities of the series not previously called for redemption.

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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 Securities selected shall be in amounts of $1,000 or whole multiples of $1,000; except that if all of the Securities of a series of a Holder are to be redeemed, the entire outstanding amount of Securities of such series held by such Holder, even if not a multiple of $1,000, shall be redeemed. A new Security of the same series in principal amount equal to the unredeemed portion thereof shall be issued in the name of the Holder thereof upon cancellation of the original Security. Securities called for redemption shall become due on the redemption date. On and after the redemption date, interest will cease to accrue on the Securities or portions of them called for redemption. Except as provided in this Section 3.02, provisions of this Indenture that apply to Securities called for redemption shall also apply to portions of Securities called for redemption.

Section 3.03. NOTICE OF REDEMPTION.

At least 30 days but not more than 60 days before a redemption date, the Company shall mail or cause to be mailed, by first class mail, a notice of redemption to each Holder whose Securities are to be redeemed at its registered address.

The notice shall identify the Securities to be redeemed, including the series thereof, and shall state:

(1) the redemption date;

(2) the redemption price, if known, or if not known, the method of calculation thereof and that the Company shall publicly announce the redemption price as soon as reasonably practical after it is calculated;

(3) the name and address of the Paying Agent;

(4) that Securities called for redemption must be surrendered to the Paying Agent to collect the redemption price;

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

(6) as to any Security being redeemed in part, the portion of the principal amount of such Security to be redeemed and that, after the redemption date upon surrender of such Security, a new Security or Securities of the same series in principal amount equal to the unredeemed portion shall be issued upon cancellation of the original;

(7) the paragraph of the Securities and/or Section of this Indenture, any supplemental indenture or any Securities pursuant to which the Securities called for redemption are being redeemed; and

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(8) that no representation is made as to the correctness or accuracy of the CUSIP number, if any, 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 the Company’s expense; provided, however , that the Company shall have delivered to the Trustee, at least 45 days prior to the redemption date (unless a shorter period is satisfactory to the Trustee), an Officers’ Certificate requesting that the Trustee give such notice and setting forth the information to be stated in such notice as provided in the preceding paragraph.

Section 3.04. EFFECT OF NOTICE OF REDEMPTION.

Once notice of redemption is mailed in accordance with Section 3.03 hereof, Securities called for redemption become irrevocably due and payable on the redemption date at the redemption price.

Section 3.05. DEPOSIT OF REDEMPTION PRICE.

No later than 12:00 p.m. (noon), Eastern Time, on any redemption date, the Company shall deposit with the Trustee or with the Paying Agent (or if the Company is acting as Paying Agent, the Company shall segregate and hold in trust for the Persons entitled to such sums) money in immediately available funds sufficient to pay the redemption price of and accrued interest, if any, 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, and accrued interest on, all Securities to be redeemed.

Section 3.06. SECURITIES REDEEMED OR PURCHASED IN PART.

Upon surrender of a Security that is redeemed in part, the Company shall issue and, upon the Company’s written request, the Trustee shall authenticate for the Holder at the expense of the Company a new Security of the same series equal in principal amount to the unredeemed portion of the Security surrendered.

Section 3.07. MANDATORY REDEMPTION; SINKING FUND.

The Company shall not be required to make mandatory redemption or sinking fund payments with respect to the Securities, unless otherwise specified in the terms of a particular series of Securities or in a supplemental indenture.

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ARTICLE 4.

COVENANTS

Section 4.01. PAYMENT OF SECURITIES.

The Company shall pay or cause to be paid the principal of, premium, if any, and interest on the Securities on the dates and in the manner provided in the Securities. Principal, premium, if any, and interest shall be considered paid on the date due if the Paying Agent, if other than the Company or a Subsidiary thereof, holds as of 12:00 p.m. (noon), Eastern 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. If the Company is the Paying Agent, principal, premium, if any, and interest shall be considered paid on the date due if it has segregated and held in trust for the benefit of the Persons entitled thereto a sum sufficient to pay the principal, premium, if any, and interest so becoming due until such sums are paid to such Persons.

Section 4.02. MAINTENANCE OF OFFICE OR AGENCY.

In satisfaction of Section 2.06, the Company shall maintain a Registrar or co-Registrar which shall be an office or agency (and which may be an office of the Trustee or an affiliate of the Trustee) where Securities may be surrendered for registration of transfer, or for exchange, and where notices and demands to or upon the Company in respect of the Securities and this Indenture may be served. The Company shall maintain a Paying Agent (which may be an office of the Trustee or an affiliate of the Trustee or the Registrar or a co-Registrar) where Securities may be surrendered for payment. If but only if Securities of any series are convertible, the Company shall maintain a Conversion Agent (which may be an office of the Trustee or the Registrar or a co-Registrar or the Paying Agent) where Securities may be surrendered for conversion. The Company shall give prompt written notice to the Trustee of the location, and any change in the location, of any such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the Trustee’s principal agency, which currently is located at 9062 Old Annapolis Road, MAC N2702-011, Columbia, MD 21045-1951.

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

Section 4.03. REPORTS.

The Company shall file with the Trustee and the Commission, and transmit to Holders, such information, documents and other reports, and such summaries thereof, as may be required pursuant to the TIA at the times and in the manner provided pursuant to the TIA; provided, however, that any such information, documents or reports required to be filed with the Commission pursuant to Section 13 or 15(d) of the Exchange Act shall be filed with the Trustee within 15 days after the same is so requested to be filed with the Commission.

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Delivery of such reports, information and documents to the Trustee is for informational 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).

Section 4.04. COMPLIANCE CERTIFICATE.

The Company will deliver to the Trustee, within 120 days after the end of each fiscal year of the Company ending after the date hereof, an Officers’ Certificate, stating whether or not to the best knowledge of the signers thereof the Company is in default in the performance and observance of any of the terms, provisions and conditions of this Indenture (without regard to any period of grace or requirement of notice provided hereunder) and, if the Company shall be in default, specifying all such defaults and the nature and status thereof of which they may have knowledge.

Section 4.05. EXISTENCE.

Subject to Article 5 hereof, the Company shall do or cause to be done all things necessary to preserve and keep in full force and effect its existence and rights (charter and statutory) as a corporation; provided , however , that the Company shall not be required to preserve any such right as a corporation, if the Board of Directors shall determine, that the preservation thereof is no longer desirable in the conduct of the business of the Company, taken as a whole, and that the loss thereof is not adverse in any material respect to the Holders of the Securities.

Section 4.06. MODIFICATION OF COVENANTS.

The covenants in this Article 4 may be modified as to the Securities of any series in the manner set forth in such Securities or by Supplemental Indenture.

ARTICLE 5.

SUCCESSORS

Section 5.01. MERGER, CONSOLIDATION, OR SALE OF ASSETS.

The Company may consolidate or merge with or into, convert itself into, or sell, assign, transfer, lease, convey or otherwise dispose of (including any such disposition that might be deemed to occur as a result of the conversion of the Company into another form of organization) all or substantially all of its properties or assets in one or more related transactions, to another Person (other than an individual, a government or an agency or political subdivision of a government), but only if (a) either (i) the Company is the surviving entity or (ii) the Person formed by or surviving any such consolidation, merger or conversion (if other than the

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Company) or to which such sale, assignment, transfer, lease, conveyance or other disposition shall have been made is either (A) a Person organized or existing under the laws of the United States, any state thereof or the District of Columbia or (B) if not organized in any such jurisdiction, then (1) such Person agrees to be subject to the service of process laws of the State of New York, and (2) under the laws of such Person’s jurisdiction of organization, payments on the Securities would not be subject to withholding tax; (b) the Person formed by or surviving any such consolidation, merger or conversion (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 (c) immediately after such transaction no Default or Event of Default exists. If the Company requests the Trustee to enter into any supplemental indenture, or to take any other action, as a result of such consolidation, merger, sale, assignment, transfer, lease, conveyance or other disposition, the Company will also furnish to the Trustee an Officer’s Certificate and an Opinion of Counsel, each to the effect that the conditions precedent set forth in this Section 5.01 have been complied with.

Section 5.02. SUCCESSOR PERSON SUBSTITUTED.

Upon any consolidation, merger or conversion, 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 5.01 hereof, the successor Person formed by such consolidation or into or with which the Company is merged or converted or to which such sale, assignment, transfer, lease, conveyance or other disposition is made shall succeed to, and be substituted for the Company (so that from and after the date of such consolidation, merger, conversion, sale, conveyance or other disposition (except for a lease), the provisions of this Indenture referring to the “Company” shall refer instead to the successor Person and not to the Company), and may exercise every right and power of the Company under this Indenture with the same effect as if such successor Person had been named as the Company herein and the predecessor Company shall be relieved of all obligations and covenants under this Indenture and the Securities; provided, however, that the predecessor Company shall not be relieved from the obligation to pay the principal of and interest on the Securities if all or substantially all of the Company’s assets are leased to the successor Person.

ARTICLE 6.

DEFAULTS AND REMEDIES

Section 6.01. EVENTS OF DEFAULT.

Except as may otherwise be provided in the Securities of any series or a supplemental indenture, an “Event of Default,” with respect to Securities of any series shall have occurred if:

(a) the Company defaults in the payment when due of interest on, or with respect to, any Security of that series and such default continues for a period of 30 days;

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(b) the Company defaults in the payment when due of principal of or premium, if any, on, or sinking fund payment, if any, with respect to, any Security of that series when the same becomes due and payable at maturity, upon redemption or otherwise;

(c) the Company fails to observe or perform any other covenant, representation, warranty or other agreement in this Indenture, with respect to any Security of that series for 60 days after notice to comply;

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

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

and the order or decree remains unstayed and in effect for 90 consecutive days.

The term “ custodian ” as used in this Article 6 means any receiver, trustee, assignee, liquidator or similar official under any Bankruptcy Law.

A Default under clause (c) with respect to the Securities of any series is not an Event of Default unless and until the Trustee notifies the Company, or the Holders of at least 25% in principal amount of the then Outstanding Securities of such series notify the Company and the Trustee, of the Default and the Company does not cure the Default within 60 days after receipt of the notice. The notice must specify the Default, demand that it be remedied and state that the notice is a “ Notice of Default .”

Section 6.02. ACCELERATION.

If any Event of Default with respect to any series of Securities (other than an Event of Default specified in clause (d) or (e) of Section 6.01 hereof) occurs and is continuing, the Trustee or the Holders of at least 25% in principal amount of the then Outstanding Securities of such

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series may declare all the Securities of such series to be due and payable immediately. Upon any such declaration, the principal of, premium, if any, and accrued and unpaid interest with respect to the Securities of all such series shall become due and payable immediately. Notwithstanding the foregoing, if an Event of Default specified in clause (d) or (e) of Section 6.01 hereof occurs with respect to the Company, all Outstanding Securities of all series shall be due and payable immediately without further action or notice, provided, however, that the payment of principal and interest on such Securities shall remain subordinated to the extent provided in Article 11.

Section 6.03. OTHER REMEDIES.

If an Event of Default occurs and is continuing, the Trustee may, subject to Article 11, pursue any available remedy to collect the payment of principal, premium, if any, and interest on the Securities or to enforce the performance of any provision of the Securities or this Indenture.

The Trustee may maintain a proceeding even if it does not possess any of the Securities or does not produce any of them in the proceeding. A delay or omission by the Trustee or any Holder of a Security in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or constitute a waiver of or acquiescence in the Event of Default. All remedies are cumulative to the extent permitted by law.

Section 6.04. WAIVER OF PAST DEFAULTS; RESCISSION OF ACCELERATION.

Holders of a majority in aggregate principal amount of the then Outstanding Securities of a series may, by notice to the Trustee on behalf of the Holders of all of the Securities of such series, waive an existing Default or Event of Default and its consequences hereunder (including in connection with an offer to purchase or exchange), except a continuing Default or Event of Default in the payment of the principal of, premium, if any, interest on, or any sinking fund payment, if any, with respect to, the Securities of such series, and except a continuing Default or Event of Default under any provision of this Indenture that, under Section 10.02, cannot be modified or waived without the consent of a greater number of Holders or of each Holder affected. Upon any such waiver, such Default or Event of Default shall be deemed to have been cured for every purpose of this Indenture; but no such waiver shall extend to any subsequent or other Default or Event of Default or impair any right consequent to such subsequent Default or Event of Default. The Holders of a majority in aggregate principal amount of the then Outstanding Securities of a series may also rescind an acceleration and its consequences with respect to all Holders of Outstanding Securities of such series, including any related payment default that resulted from such acceleration, but not including any other payment default.

Section 6.05. CONTROL BY MAJORITY.

Holders of a majority in principal amount of the then Outstanding Securities of a series as to which an Event of Default or a Default has occurred may direct the time, method and place of conducting any proceeding for exercising any remedy available to the Trustee or exercising any trust or power conferred on it; provided, however, that

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Section 6.06. LIMITATION ON SUITS.

A Holder of a Security of any series may pursue a remedy with respect to this Indenture or the Securities of such series only if:

(a) the Holder of a Security of such series gives to the Trustee written notice of a continuing Event of Default;

(b) the Holders of at least 25% in principal amount of the then Outstanding Securities of such series make a written request to the Trustee to pursue the remedy;

(c) such Holder or Holders offer to indemnify and, if requested by the Trustee, provide indemnity satisfactory to the Trustee against any loss, liability or expense relating to such action;

(d) the Trustee does not comply with the request within 30 days after receipt of the request and the offer and, if requested, the provision of indemnity; and

(e) during such 30-day period the Holders of a majority in principal amount of the then Outstanding Securities of such series do not give the Trustee a direction inconsistent with the request.

A Holder of a Security of a series may not use this Indenture to prejudice the rights of another Holder of a Security of such series or to obtain a preference or priority over another Holder of a Security of such series.

Section 6.07. RIGHTS OF HOLDERS OF SECURITIES TO RECEIVE PAYMENT AND TO CONVERT.

Notwithstanding any other provision of this Indenture, the right of any Holder of a Security of any series to receive payment of principal, premium, if any, and interest on such Security on or after the respective due dates expressed in such Security (including in connection with an offer to purchase), to convert such Security in accordance with Article 13, or to bring suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder.

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Section 6.08. COLLECTION SUIT BY TRUSTEE.

If an Event of Default specified in Section 6.01(a) or (b) occurs and is continuing with respect to any series of Securities, the Trustee is authorized to recover judgment in its own name and as Trustee of an express trust against the Company for the whole amount of principal of, premium, if any, and interest remaining unpaid on such Securities and interest on overdue principal and such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel.

Section 6.09. TRUSTEE MAY FILE PROOFS OF CLAIM.

The Trustee is authorized to file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel) and the Holders of the Securities of any series allowed in any judicial proceedings relative to the Company (or any other obligor upon the Securities), its creditors or its property and shall be entitled and empowered to collect, receive and distribute any money or other property payable or deliverable on any such claims and any custodian 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 consents to the making of such payments directly to the Holders, to pay to the Trustee any amount due to it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07 hereof. To the extent that the payment of any such compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07 hereof out of the estate in any such proceeding, shall be denied for any reason, payment of the same shall be secured by a lien on, and shall be paid out of, any and all distributions, dividends, money, securities and other properties that the Holders may be entitled to receive in such proceeding whether in liquidation or under any plan of reorganization or arrangement or otherwise. Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf of any Holder any plan of reorganization, arrangement, adjustment or composition affecting the Securities of any series or the rights of any Holder, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding.

Section 6.10. PRIORITIES.

Subject to Article 11, if the Trustee collects any money or other property pursuant to this Article, it shall pay out the money or other property in the following order:

First: to the Trustee, its agents and attorneys for amounts due under Section 7.07 hereof, including payment of all compensation, expense and liabilities incurred, and all advances made, by the Trustee and the costs and expenses of collection;

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

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Third: to the Company or to such party as a court of competent jurisdiction shall direct.

The Trustee may fix a record date and payment date for any payment to Holders of Securities pursuant to this Section 6.10.

Section 6.11. UNDERTAKING FOR COSTS.

In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as a Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys’ fees, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section does not apply to a suit by the Trustee, a suit by a Holder of a Security pursuant to Section 6.07 hereof, or a suit by Holders of more than 10% in principal amount of the then Outstanding Securities of any series.

ARTICLE 7.

TRUSTEE

Section 7.01. DUTIES OF TRUSTEE.

(a) 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 or an indenture supplemental hereto, and use the same degree of care and skill in its exercise, as a prudent person would exercise or use under the circumstances in the conduct of its own affairs.

(b) Except during the continuance of an Event of Default:

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(c) 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:

(d) Whether or not therein expressly so provided, every provision of this Indenture that in any way relates to the Trustee is subject to paragraphs (a), (b), and (c) of this Section.

(e) 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.

Section 7.02. RIGHTS OF TRUSTEE.

(a) 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 the document.

(b) 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, and the written 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.

(c) The Trustee may act through its attorneys and agents and shall not be responsible for the misconduct or negligence of any agent appointed with due care.

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

(e) Unless otherwise specifically provided in this Indenture, any demand, request, direction or notice from the Company shall be sufficient if signed by an Officer of the Company.

(f) No provision of this Indenture shall require the Trustee to expend or risk its own funds or incur any liability. The Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders unless such Holders have offered to the Trustee reasonable security or indemnity satisfactory to it against the costs, expenses and liabilities that might be incurred by it in compliance with such request or direction.

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Section 7.03. INDIVIDUAL RIGHTS OF TRUSTEE.

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. However, in the event that the Trustee acquires any conflicting interest (within the meaning of TIA § 310(b)) it must eliminate such conflicting interest within 90 days after Default, apply to the SEC for permission to continue as trustee, or resign. Any Agent may do the same with like rights and duties.

Section 7.04. TRUSTEE’S DISCLAIMER.

The Trustee shall not be responsible for and makes no representation as to the validity or adequacy of this Indenture or the Securities; it shall not 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; it shall not be responsible for the use or application of any money received by any Paying Agent other than the Trustee; and it shall not be responsible for any statement or recital herein or any statement in the Securities or any other document in connection with the sale of the Securities or pursuant to this Indenture other than its certificate of authentication.

Section 7.05. NOTICE OF DEFAULTS.

If a Default or Event of Default occurs and is continuing and if a Responsible Officer of the Trustee has actual knowledge of such Default or Event of Default, the Trustee shall mail to Holders of 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 of principal of, or interest on, any Security, 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 the Securities.

Section 7.06. REPORTS BY TRUSTEE TO HOLDERS OF THE SECURITIES.

On or before March 1 of each year, beginning with the March 1 following the date on which Securities are first issued under this Indenture, and for so long as Securities remain Outstanding, the Trustee shall mail to the Holders of the Securities 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)(2). The Trustee will 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 of Securities shall be mailed to the Company and filed with the SEC and each stock exchange on which the Securities are listed in accordance with TIA § 313(d). The Company shall promptly notify the Trustee when the Securities are listed on any stock exchange.

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Section 7.07. COMPENSATION AND INDEMNITY.

The Company shall pay to the Trustee from time to time such compensation for its acceptance of this Indenture and services hereunder as the Company and Trustee have separately agreed. 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 reasonable 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.

The Company shall indemnify the Trustee against any and all losses, liabilities or expenses incurred by it arising out of or in connection with the acceptance or administration of its duties under this Indenture, including the costs and expenses of enforcing this Indenture against the Company (including this Section 7.07) and defending itself against any claim (whether asserted by the Company or any Holder or any other person) or liability in connection with the exercise or performance of any of its powers or duties hereunder, except to the extent any such loss, liability or expense may be attributable to its negligence or willful misconduct. 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, and the Company shall pay the reasonable fees and expenses of such counsel. The Company need not pay for any settlement made without its consent, which consent shall not be unreasonably withheld.

The obligations of the Company under this Section 7.07 shall survive the satisfaction and discharge of this Indenture, and the removal or resignation of the Trustee.

To secure the Company’s payment obligations in this Section, 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 of, premium, if any, and interest on particular Securities. 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 6.01(d) or (e) 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.

Section 7.08. REPLACEMENT OF TRUSTEE.

A resignation or removal of the Trustee and appointment of a successor Trustee shall become effective only upon the successor Trustee’s acceptance of appointment as provided in this Section.

The Trustee may resign with respect to one or more or all series of Securities at any time and be discharged from the trust hereby created by so notifying the Company in writing. The Holders of a majority in principal amount of the then Outstanding Securities of any series may remove the Trustee with respect to such series by so notifying the Trustee and the Company in writing. The Company may remove the Trustee if:

(a) the Trustee ceases to be eligible in accordance with Section 7.10 hereof;

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(b) the Trustee is adjudged bankrupt or insolvent or an order for relief is entered with respect to the Trustee under any Bankruptcy Law;

(c) a custodian or public officer takes charge of the Trustee or its property; or

(d) the Trustee becomes incapable of acting.

If the Trustee resigns or is removed or if a vacancy exists in the office of Trustee for any reason, the Company shall promptly appoint a successor Trustee. Within one year after the successor Trustee takes office, the Holders of a majority in principal amount of the then Outstanding Securities of a series may appoint a successor Trustee to replace the successor Trustee appointed by the Company with respect to that series of Securities.

If a successor Trustee does not take office within 60 days after the retiring Trustee resigns or is removed, the retiring Trustee, the Company, or the Holders of at least 10% in principal amount of the then Outstanding Securities of all series issued under this Indenture may petition any court of competent jurisdiction for the appointment of a successor Trustee.

If the Trustee, after written request by any Holder of a Security who has been a Holder of a Security for at least six months, ceases to be eligible in accordance with Section 7.10, such Holder of a Security may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee.

A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company. Thereupon, the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Holders of the Securities. The retiring Trustee shall promptly transfer all property held by it as Trustee to the successor Trustee subject to the lien provided for in Section 7.07 hereof. Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the Company’s obligations under Section 7.07 hereof shall continue for the benefit of the retiring Trustee.

If a successor Trustee is appointed 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 any applicable series shall execute and deliver an indenture supplemental hereto which 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 any series as to which the predecessor Trustee is not retiring shall continue to be vested in the predecessor Trustee, and shall add to or change any of the provisions of this Indenture as are 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 as 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.

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Section 7.09. SUCCESSOR TRUSTEE BY MERGER, ETC.

If the Trustee consolidates, merges or converts into, or transfers all or substantially all of its corporate trust business to, another corporation, the successor corporation without any further act shall be the successor Trustee.

Section 7.10. ELIGIBILITY; DISQUALIFICATION.

There shall at all times be a Trustee hereunder that is a corporation organized and doing business under the laws of the United States of America or of any state thereof that is authorized under such laws to exercise corporate trust powers, that is subject to supervision or examination by federal or state authorities and that has a combined capital and surplus of at least $500,000,000 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); provided, however, that there shall be excluded from the operation of TIA § 310(b)(1) any indenture or indentures under which other securities, or certificates of interest or participation in other securities, of the Company are Outstanding, if the requirements for such exclusion set forth in TIA § 310(b)(1) are met.

Section 7.11. PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

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

ARTICLE 8.

SATISFACTION AND DISCHARGE

Section 8.01. SATISFACTION AND DISCHARGE.

(a) The obligations of the Company under this Indenture shall terminate with respect to the Securities of one or more series (except those obligations referred to in Section 8.01(b), (1) if (i) all Securities of such series theretofore authenticated and delivered (except Securities that have been replaced pursuant to Section 2.10 or paid and Securities whose payment in cash has theretofore been deposited with the Trustee or a Paying Agent or segregated and held in trust by the Company and thereafter repaid to the Company or discharged from such trust as provided in Section 9.06) have been delivered to the Trustee for cancellation; and (ii) the Company has paid all sums payable by it hereunder or under the applicable Board Resolution or indenture supplemental hereto in respect of such series of Securities not in violation of Article 11; or (2) if (i) either (A) in the case of a series of Securities redeemable prior to its stated maturity, the

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Company, pursuant to Article 3, has given notice to the Trustee and mailed a notice of redemption to each Holder of Securities of such series of the redemption of all of such Securities under arrangements satisfactory to the Trustee for the giving of such notice or (B) all Securities of such series have otherwise become due and payable hereunder or will become due and payable within one year; (ii) the Company has irrevocably deposited or caused to be deposited with the Trustee or the Paying Agent (or if the Company is acting as Paying Agent, the Company has segregated and held), as trust funds in trust solely for the benefit of the Holders of Securities of such series for that purpose, either (A) an amount of cash in United States dollars, (B) non-callable U.S. Government Obligations which, through scheduled payment of principal and interest in respect thereof in accordance with their terms, will provide, not later than one Business Day before the due date of any payment of principal of, premium, if any, or interest on the Securities of such series, cash in an amount, or (C) a combination thereof, sufficient, in the opinion of a nationally recognized firm of independent public accountants, to pay the entire indebtedness on such Securities not theretofore delivered to the Trustee for cancellation, for the principal of, premium, if any, and interest on the Outstanding Securities of such series to the date of such deposit (in the case of Securities which have become due and payable) or to the stated maturity or redemption date, as the case may be not in violation of Article 11; and (iii) the Company shall have paid all other sums payable by it hereunder in respect of Securities of such series.

(b) Notwithstanding Section 8.01(a), the Company’s obligations in Sections 2.08, 2.09, 2.10, 2.11, 4.01 and 4.02 shall survive with respect to the Securities of the applicable series until the sums held in trust pursuant to Section 8.01(a) are made available to the Holder’s of the Securities of such series on the Stated Maturity Date. Sections 7.07, 9.06 and 9.07 shall survive such discharge of the Company’s other obligations pursuant to the preceding sentence in respect of Securities of the applicable series.

(c) After such delivery or irrevocable deposit, and delivery to the Trustee of an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent set forth in Section 8.1(a) above relating to the satisfaction and discharge of this Indenture have been complied with, the Trustee upon request shall acknowledge in writing the discharge of the Company’s obligations under the Securities of the applicable series and the Company’s obligations under this Indenture with respect to the Securities of such series, except for those surviving obligations specified above.

Section 8.02. APPLICATION OF TRUST MONEY; EXCESS AMOUNTS.

(a) All money and U.S. Government Obligations deposited with the Trustee or Paying Agent (or if the Company is the Paying Agent, segregated and held in trust by the Company) pursuant to Section 8.01 shall be held in trust and applied by such Person, in accordance with the provisions of the Securities and this Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as its own Paying Agent) as the Trustee may determine, to the Persons entitled thereto, of the principal (and premium, if any) and interest for whose payment such money has been deposited with the Trustee. All such money and U.S. Government Obligations deposited with the Trustee, Paying Agent (or if the Company is Paying Agent, so segregated and held in trust) in compliance with the provisions of Article 11, shall be held in trust for the Holders of Securities, the Trustee and the Paying Agent, as applicable, and shall not be subject to the subordination provisions of Article 11.

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(b) Anything in this Article 8 to the contrary notwithstanding, the Trustee shall deliver or pay to the Company from time to time upon the request of the Company any money (including any interest) or non-callable U.S. Government Obligations held by it as provided in this Article 8 which, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee is in excess of the amount thereof that would then be required to be deposited to effect a satisfaction and discharge of the applicable series.

ARTICLE 9.

LEGAL DEFEASANCE AND COVENANT DEFEASANCE

Section 9.01. OPTION TO EFFECT LEGAL DEFEASANCE OR COVENANT DEFEASANCE

The Company may, at the option of its Board of Directors evidenced by a resolution set forth in an Officers’ Certificate, at any time, elect to have either Section 9.02 or 9.03 hereof, with such modifications thereto as may be specified in the Board Resolution or supplemental indenture establishing a particular series of Securities, be applied to all Outstanding Securities of one or more series upon compliance with the conditions set forth below in this Article 9.

Section 9.02. LEGAL DEFEASANCE AND DISCHARGE.

Upon the Company’s exercise under Section 9.01 hereof of the option applicable to this Section 9.02 relating to one or more series of Securities, the Company shall, upon the satisfaction of the conditions set forth in Section 9.04 hereof, be deemed to have been discharged from its obligations with respect to all Outstanding Securities of such series on the date the conditions set forth below are satisfied (hereinafter, “ Legal Defeasance ”). For this purpose, Legal Defeasance means that the Company shall be deemed to have paid and discharged the entire indebtedness represented by the Outstanding Securities of the applicable series, except as set forth in Section 9.05 hereof and the other Sections of this Indenture referred to in (a) and (b) below, and to have satisfied all of its other obligations under the Securities of the applicable series and under the provisions of this Indenture applicable to such series (and the Trustee, on demand of and at the expense of the Company, shall execute proper instruments acknowledging the same), except for the following provisions which shall survive until otherwise terminated or discharged hereunder: (a) the rights of Holders of Outstanding Securities of the applicable series to receive solely from the trust fund described in Section 9.04 hereof, and as more fully set forth in such Section, payments in respect of the principal of, premium, if any, and interest, on such Securities when such payments are due, (b) the Company’s Obligations with respect to such Securities under Article 2 and Section 4.02 hereof, (c) the rights, powers, trusts, duties and immunities of the Trustee hereunder, and the Company’s obligations in connection therewith and (d) this Article 9. The Securities of the applicable series shall cease to be Outstanding for all purposes except as set forth in the preceding sentence. Subject to compliance with this Article 9, the Company may exercise its option under this Section 9.02 notwithstanding the prior exercise of its option under Section 9.03 hereof.

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Section 9.03. COVENANT DEFEASANCE.

Upon the Company’s exercise under Section 9.01 hereof of the option applicable to this Section 9.03 relating to one or more series of Securities, the Company shall, upon the satisfaction of the conditions set forth in Section 9.04 hereof, be released from its obligations under the covenants contained in Sections 4.03, 4.04, 5.01, and 14.08 hereof with respect to the Outstanding Securities of the applicable series, and under any other covenants specified in the supplemental indenture or other terms of the applicable series as covenants to which this Section 9.03 apply, on and after the date the conditions set forth below are satisfied (hereinafter, “ Covenant Defeasance ”), and the Securities of the applicable series shall thereafter not be deemed Outstanding for the purposes of any direction, waiver, consent or declaration or act of Holders (or the consequences of any thereof) in connection with such covenants, but shall continue to be deemed Outstanding for all other purposes hereunder. For this purpose, Covenant Defeasance means that, with respect to the Outstanding Securities of the applicable series, the Company may omit to comply with and shall have no liability in respect of any term, condition or limitation set forth in any such covenant, whether directly or indirectly, by reason of any reference elsewhere herein to any such covenant or by reason of any reference in any such covenant to any other provision herein or in any other document and such omission to comply shall not constitute a Default or an Event of Default under Section 6.01 hereof, but, except as specified above, the remainder of this Indenture and such Securities shall be unaffected thereby.

Section 9.04. CONDITIONS TO LEGAL OR COVENANT DEFEASANCE.

The following shall be the conditions to the application of either Section 9.02 or 9.03 hereof to the Outstanding Securities of one or more series:

In order to exercise either Legal Defeasance or Covenant Defeasance:

(a) the Company must irrevocably deposit with the Trustee, (or another trustee satisfying the requirements of Section 7.10, who shall agree to comply with the provisions of this Article 9 applicable to it) in trust, for the benefit of the Holders of the Securities of the applicable series, (i) an amount of cash in United States dollars, (ii) non-callable U.S. Government Obligations which, through scheduled payment of principal and interest in respect thereof in accordance with their terms, will provide, not later than one Business Day before the due date of any payment of principal of, premium, if any, or interest on the Securities of such series, cash in an amount, or (iii) a combination thereof, sufficient, in the opinion of a nationally recognized firm of independent public accountants, to pay the principal of, interest and premium, if any, on the Outstanding Securities of the applicable series on the Stated Maturity or on the applicable redemption date, as the case may be, and any mandatory sinking fund payments applicable to the Securities of such series on the day on which such payments are due, and the Company must specify whether the Securities of the applicable series are being defeased to maturity or to a particular redemption date;

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(b) in the case of an election under Section 9.02 hereof, the Company shall have delivered to the Trustee an Opinion of Counsel in the United States reasonably acceptable to the Trustee confirming that (i) the Company has received from, or there has been published by, the Internal Revenue Service a ruling or (ii) since the date of this Indenture, there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Holders of the Outstanding Securities of the applicable series will not recognize income, gain or loss for federal income tax purposes as a result of such Legal Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Legal Defeasance had not occurred;

(c) in the case of an election under Section 9.03 hereof, the Company shall have delivered to the Trustee an Opinion of Counsel in the United States reasonably acceptable to the Trustee confirming that the Holders of the Outstanding Securities of the applicable series will not recognize income, gain or loss for federal income tax purposes as a result of such Covenant Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Covenant Defeasance had not occurred;

(d) no Default or Event of Default shall have occurred and be continuing on the date of such deposit (other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposit); and

(e) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for or relating to the Legal Defeasance or the Covenant Defeasance have been complied with.

Section 9.05. DEPOSITED MONEY AND U.S. GOVERNMENT OBLIGATIONS TO BE HELD IN TRUST; OTHER MISCELLANEOUS PROVISIONS.

Subject to Section 9.06 hereof, all money and non-callable U.S. Government Obligations (including the proceeds thereof) deposited with the Trustee (or other qualifying trustee, collectively for purposes of this Section 9.05, the “ Trustee ”) pursuant to Section 9.04 hereof in respect of the Outstanding Securities of the applicable series shall be held in trust and applied by the Trustee, in accordance with the provisions of such Securities and this Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as Paying Agent) as the Trustee may determine, to the Holders of such Securities of all sums due and to become due thereon in respect of principal, premium, if any, and interest, but such money need not be segregated from other funds except to the extent required by law. Any amounts so deposited with the Trustee in compliance with Article 11 shall be held in trust by the Trustee for the purposes set forth in the preceding sentence and shall not be subject to the subordination provisions of Article 11.

The Company shall pay and indemnify the Trustee against any tax, fee or other charge imposed on or assessed against the cash or non-callable U.S. Government Obligations deposited pursuant to Section 9.04 hereof or the principal and interest received in respect thereof other than any such tax, fee or other charge which by law is for the account of the Holders of the Outstanding Securities of the applicable series.

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Anything in this Article 9 to the contrary notwithstanding, the Trustee shall deliver or pay to the Company from time to time upon the request of the Company any money or non-callable U.S. Government Obligations held by it as provided in Section 9.04 hereof which, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee (which may be the opinion delivered under Section 9.04(a) hereof), are in excess of the amount thereof that would then be required to be deposited to effect an equivalent Legal Defeasance or Covenant Defeasance of the applicable series.

Section 9.06. REPAYMENT TO COMPANY.

Any money and U.S. Government Obligations deposited with the Trustee or any Paying Agent, or then held by the Company, in trust for the payment of the principal of, premium, if any, or interest on any Security and remaining unclaimed for one year after such principal, and premium, if any, or interest has become due and payable shall be paid to the Company on its request or (if then held by the Company) shall be discharged from such trust; and the Holder of such Security shall thereafter look only to the Company for payment thereof, and all liability of the Trustee or such Paying Agent with respect to such money and U.S. Government Obligations, and all liability of the Company as trustee thereof, shall thereupon cease; provided, however , that the Trustee or such Paying Agent, before being required to make any such repayment, may at the expense of the Company cause to be published once, in the New York Times and The Wall Street Journal (national edition), notice that such money remains unclaimed and that, after a date specified therein, which shall not be less than 30 days from the date of such notification or publication, any unclaimed balance of such money then remaining will be repaid to the Company.

Section 9.07. REINSTATEMENT.

If the Trustee or Paying Agent is unable to apply any United States dollars or non-callable U.S. Government Obligations deposited pursuant to Section 9.02 or 9.03 hereof, as the case may be, by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, or if any amounts previously applied are required to be returned to the Company or to any trustee in connection with any proceeding referred to in Section 6.01(d) or (e) then the obligations of the Company under this Indenture and the Securities shall be revived and reinstated as though no deposit had occurred pursuant to Section 9.02 or 9.03 hereof until such time as the Trustee or Paying Agent is permitted to apply all such money in accordance with Section 9.02 or 9.03 hereof, as the case may be; provided, however , that, if the Company makes any payment of principal of, premium, if any, or interest on any Security following the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of such Securities to receive such payment from the money held by the Trustee or Paying Agent.

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ARTICLE 10.

AMENDMENT, SUPPLEMENT AND WAIVER

Section 10.01. WITHOUT CONSENT OF HOLDERS OF SECURITIES.

Notwithstanding Section 10.02 of this Indenture, the Company and the Trustee may amend or supplement this Indenture or the Securities without the consent of any Holder of a Security:

(a) to evidence the succession of another Person to the Company, or successive successions, and the assumption by the successor Person of the covenants, agreements and obligations of the Company pursuant to Article 5 hereof;

(b) to add to the covenants of the Company such further covenants, restrictions or conditions or to add guarantees or security for the protection or for the benefit of the Holders of all or any series of Securities (and if such covenants are to be for the benefit of less than all series of Securities stating that such covenants are expressly being included for the benefit of such series) as the Board of Directors and the Trustee shall consider to be for the protection of the Holders of such Securities, and to make the occurrence, or the occurrence and continuance, of a default in any of such additional covenants, restrictions or conditions a default or an Event of Default permitting the enforcement of all or any of the several remedies provided in this Indenture as herein set forth; provided, however, that in respect of any such additional covenant, restriction or condition such supplemental indenture may provide for a particular period of grace after default (which period may be shorter or longer than that allowed in the case of other defaults) or may provide for an immediate enforcement upon such default or may limit the remedies available to the Trustee upon such default;

(c) to provide for the issuance under this Indenture of Securities in coupon form (including Securities registrable as to principal only) and to provide for exchangeability of such Securities with the Securities issued hereunder in fully registered form and to make all appropriate changes for such purpose;

(d) to provide for the issuance of uncertificated Securities in addition to or in place of certificated Securities;

(e) to cure any ambiguity or error or to correct or supplement any provision contained herein or in any supplemental indenture which may be defective or inconsistent with any other provision contained herein or in any supplemental indenture, or to make any other provisions in regard to matters or questions arising under this Indenture; provided that any such action shall not adversely affect in any material respect the interests of the Holders of such Securities;

(f) to evidence and provide for the acceptance of appointment hereunder by a successor trustee with respect to the Securities of one or more series and to add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one trustee, pursuant to the requirements of Section 7.08;

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(g) to provide for the issuance of and establish the form and terms and conditions of the Securities of any series, to establish the form of any certifications required to be furnished pursuant to the terms of this Indenture or any series of Securities, or to add to the rights of the Holders of any series of Securities; or

(h) to comply with the requirements of the SEC or to effect or maintain the qualification of this Indenture under the TIA.

Upon the request of the Company accompanied by a copy of a Board Resolution, certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors and to be in full force and effect on the date of the certificate, authorizing the execution of any such amended or supplemental indenture, and upon receipt by the Trustee of the documents described in Section 7.02(b) hereof, the Trustee shall join with the Company in the execution of any amended or supplemental indenture authorized or permitted by the terms of this Indenture and to make any further appropriate agreements and stipulations that may be therein contained, but the Trustee shall not be obligated to enter into any such amended or supplemental indenture that affects its own rights, duties, liabilities or immunities under this Indenture or otherwise, in which case the Trustee may in its discretion, but will not be obligated to, enter into such amended or supplemental indenture.

Section 10.02. WITH CONSENT OF HOLDERS OF SECURITIES.

Except as provided below in this Section 10.02, the Company and the Trustee may amend or supplement this Indenture, or the Securities of any series may be amended or supplemented, with the consent of the Holders of a majority in principal amount of the Securities then Outstanding of all series affected by such amendment or supplemental indenture treating the Holders of all such Securities as a single class (including, without limitation, consents obtained in connection with a purchase of, or tender offer or exchange offer for, Securities), and, subject to Sections 6.04 and 6.07 hereof, any existing Default or Event of Default (other than a Default or Event of Default in the payment of the principal of, premium, if any, or interest on the Securities) or compliance with any provision of this Indenture or the Securities of such series may be waived with the consent of the Holders of a majority in principal amount of the Securities then Outstanding of all series affected by such waiver treating the Holders of all such Securities as a single class (including, without limitation, consents obtained in connection with a purchase of, or tender offer or exchange offer for the Securities).

Upon the request of the Company accompanied by a copy of a Board Resolution, certified by the Secretary or an Assistant Secretary of the Company to have been duly adopted by the Board of Directors and to be in full force and effect on the date of the certificate, authorizing the execution of any such amended or supplemental indenture, and upon the filing with the Trustee of evidence satisfactory to the Trustee of the consent of the Holders of Securities of each such series as aforesaid, and upon receipt by the Trustee of the documents described in Section 7.02(b) hereof, the Trustee will join with the Company in the execution of such amended or supplemental indenture unless such amended or supplemental indenture adversely affects the Trustee’s own rights, duties, liabilities or immunities under this Indenture or otherwise, in which case the Trustee may in its discretion, but will not be obligated to, enter into such amended or supplemental indenture.

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It will not be necessary for the consent of the Holders of Securities under this Section 10.02 to approve the particular form of any proposed amendment or waiver, but it will be sufficient if such consent approves the substance thereof.

After an amendment, supplement or waiver under this Section 10.02 becomes effective, the Company will mail to the Holders of Securities of each series affected thereby a notice briefly describing the amendment, supplement or waiver. Any failure of the Company to mail such notice, or any defect therein, will not, however, in any way impair or affect the validity of any such amended or supplemental indenture or waiver.

However, without the consent of each Holder of Securities affected an amendment or waiver may not:

(a) reduce the principal amount of the Securities of any series whose Holders must consent to an amendment, supplement or waiver;

(b) reduce the principal of or change the fixed maturity of the principal of, premium, if any, or mandatory sinking fund obligation, if any, with respect to any Securities of any series or alter the provisions with respect to the redemption of the Securities of any series;

(c) reduce the rate of or change the time for payment of interest, including default interest, on any Security of any series;

(d) impair the right to convert the Securities into Common Stock subject to the terms set forth in Article 13;

(e) waive a Default or Event of Default in the payment of principal of or interest or premium, if any, on the Securities of any series (except a rescission of acceleration of the Securities by the Holders of a majority in aggregate principal amount of the Securities of any one or more affected series and a waiver of the payment default that resulted from such acceleration);

(f) make any Security of any series payable in currency other than that stated in the Securities of such series;

(g) make any change in the provisions of this Indenture relating to waivers of past Defaults or the rights of Holders of Securities of a series to receive payments of principal of or interest or premium, if any, on the Securities of a series;

(h) waive a redemption payment with respect to any Security of a series; or

(i) make any change in Section 6.04 or 6.07 hereof or in the amendment and waiver provisions of Section 10.01 or this Section 10.02.

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Section 10.03. COMPLIANCE WITH TRUST INDENTURE ACT.

Every amendment or supplement to this Indenture or the Securities shall be set forth in an amended or supplemental indenture that complies with the TIA as then in effect.

Section 10.04. REVOCATION AND EFFECT OF CONSENTS.

Until an amendment, supplement or waiver becomes effective, a consent to it by a Holder of a Security is a continuing consent by the Holder of a Security and every subsequent Holder of a Security or portion of a Security that evidences the same debt as the consenting Holder’s Securities, even if notation of the consent is not made on any Securities. However, any such Holder of a Security or subsequent Holder of a Security may revoke the consent as to its Securities if the Trustee receives written notice of revocation before the date the waiver, supplement or amendment becomes effective. An amendment, supplement or waiver becomes effective in accordance with its terms and thereafter binds every Holder, except as otherwise provided herein.

Section 10.05. NOTATION ON OR EXCHANGE OF SECURITIES.

The Trustee may place an appropriate notation about an amendment, supplement or waiver on any Securities thereafter authenticated. The Company in exchange for all Securities may issue and the Trustee shall authenticate new Securities that reflect the amendment, supplement or waiver.

Failure to make the appropriate notation or to issue new Securities shall not affect the validity and effect of such amendment, supplement or waiver.

Section 10.06. TRUSTEE TO SIGN AMENDMENTS, ETC.

The Company may not sign an amendment or supplemental indenture until its Board of Directors approves it. The Trustee shall sign any amendment or supplemental indenture authorized pursuant to this Article 10 if the amendment or supplement does not adversely affect the rights, duties, liabilities or immunities of the Trustee. In signing such amendment or supplemental indenture, the Trustee shall be entitled to receive and shall be fully protected in relying upon, an Officers’ Certificate and an Opinion of Counsel as conclusive evidence that such amendment or supplemental indenture is authorized or permitted by this Indenture, that it is not inconsistent herewith, and that it will be valid and binding upon the Company in accordance with its terms.

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ARTICLE 11.

MEETINGS OF HOLDERS

Section 11.01. PURPOSES FOR WHICH MEETING MAY BE CALLED.

A meeting of Holders of Securities of any series may be called at any time and from time to time pursuant to this Article 11 to make, give or take any request, demand, authorization, direction, notice, consent, waiver or other Act to be made, given or taken by Holders of Securities of such series.

Section 11.02. CALL, NOTICE AND PLACE OF MEETINGS.

(a) The Trustee may at any time call a meeting of Holders of Securities of any series for any purpose specified in Section 11.01, to be held at such time and at such place as the Trustee may determine. Notice of every meeting of Holders of Securities of any series, setting forth the time and the place of such meeting and in general terms the action proposed to be taken at such meeting, shall be given, in the manner provided in Section 13.02, not less than 20 nor more than 180 days prior to the date fixed for the meeting.

(b) In case at any time the Company, by or pursuant to a Board Resolution, or the Holders of at least 25% in principal amount of the Outstanding Securities of any series shall have requested the Trustee to call a meeting of the Holders of Securities of such series for any purpose specified in Section 11.01 by written request setting forth in reasonable detail the Act or other action proposed to be taken at the meeting, and the Trustee shall not have mailed notice of such meeting within 20 days after receipt of such request or shall not thereafter proceed to cause the meeting to be held as provided herein, then the Company or the Holders of Securities of such series in the amount above specified, as the case may be, may determine the time and the place for such meeting and may call such meeting for such purposes by giving notice thereof as provided in clause (a) of this Section.

Section 11.03. PERSONS ENTITLED TO VOTE AT MEETINGS.

To be entitled to vote at any meeting of Holders of Securities of any series, a Person must be (a) a Holder of one or more Outstanding Securities of such series, or (b) a Person appointed by an instrument in writing as proxy for a Holder or Holders of one or more Outstanding Securities of such series by such Holder or Holders. No vote may be cast or counted at any meeting in respect of any Security challenged as not Outstanding and ruled by the chairman of the meeting to be not Outstanding. The chairman of the meeting will have no right to vote, except as a Holder of a Security of such series or proxy. The only Persons who shall be entitled to be present or to speak at any meeting of Holders of Securities of any series shall be the Persons entitled to vote at such meeting and their counsel, any representatives of the Trustee and its counsel and any representatives of the Company and its counsel.

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Section 11.04. QUORUM; ACTION.

The Persons entitled to vote a majority in principal amount of the Outstanding Securities of a series shall constitute a quorum for a meeting of Holders of Securities of such series; provided, however, that if any Act is to be taken at such meeting with respect to a consent or waiver which this Indenture (or any Board Resolution or indenture supplemental hereto establishing a series of Securities hereunder) expressly provides may be given by the Holders of more or less than a majority in principal amount of the Outstanding Securities of a series, the Persons entitled to vote such percentage in principal amount of the Outstanding Securities of such series shall constitute a quorum. In the absence of a quorum within 30 minutes after the time appointed for any such meeting, the meeting shall, if convened at the request of Holders of Securities of such series, be dissolved. In any other case the meeting may be adjourned for a period determined by the chairman of the meeting prior to the adjournment of such meeting. In the absence of a quorum at any reconvened meeting, such reconvened meeting may be further adjourned as determined by the chairman of the meeting prior to the adjournment of such adjourned meeting. Notice of the reconvening of any such adjourned meeting shall be given as provided in Section 11.02(a), except that such notice need be given only once not less than five days prior to the date on which the meeting is scheduled to be reconvened. Notice of the reconvening of an adjourned meeting shall state expressly the percentage, as provided above, of the principal amount of the Outstanding Securities of such series which shall constitute a quorum.

Except as otherwise provided in Section 6.02 or 10.02 (or in any Board Resolution or indenture supplemental hereto establishing a series of Securities hereunder), any resolution presented to a meeting or adjourned meeting duly reconvened at which a quorum is present as aforesaid may be adopted only by the affirmative vote of the Holders of a majority in principal amount of the Outstanding Securities of that series; provided, however, that, except as otherwise provided in Section 6.02 or 10.02 (or in any Board Resolution or indenture supplemental hereto establishing a series of Securities hereunder), any resolution with respect to any request, demand, authorization, direction, notice, consent, waiver or other action which this Indenture or any supplemental indenture expressly provides may be made, given or taken by the Holders of a specified percentage in principal amount of the Outstanding Securities of a series may be adopted at a meeting or an adjourned meeting duly reconvened and at which a quorum is present as aforesaid by the affirmative vote of the Holders of such specified percentage in principal amount of the Outstanding Securities of such series.

Any resolution passed or decision taken at any meeting of Holders of Securities of any series duly held in accordance with this Section or other Act duly taken shall be binding on all the Holders of Securities of such series, whether or not such Holders were present or represented at the meeting, if any.

Section 11.05. DETERMINATION OF VOTING RIGHTS; CONDUCT AND ADJOURNMENT OF MEETINGS.

Notwithstanding any other provisions of this Indenture, the Trustee may make such reasonable regulations as it may deem advisable for any meeting of Holders of Securities of a series in regard to proof of the holding of Securities of such series and of the appointment of

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proxies and in regard to the appointment and duties of inspectors of votes, the submission and examination of proxies, certificates and other evidence of the right to vote, and such other matters concerning the conduct of the meeting as it shall deem appropriate. Except as otherwise permitted or required by any such regulations, the holding of Securities shall be proved in the manner specified in Section 1.05 and the appointment of any proxy shall be proved in the manner specified in Section 1.05. Such regulations may provide that written instruments appointing proxies, regular on their face, may be presumed valid and genuine without the proof specified in Section 1.05 or other proof.

The Trustee shall, by an instrument in writing, appoint a temporary chairman of the meeting, unless the meeting shall have been called by the Company or by Holders of Securities as provided in Section 11.02(b), in which case the Company or the Holders of Securities of the series calling the meeting, as the case may be, shall in like manner appoint a temporary chairman. A permanent chairman and a permanent secretary of the meeting shall be elected by vote of the Persons entitled to vote at least a majority in principal amount of the Outstanding Securities of such series represented at the meeting.

Any meeting of Holders of Securities of any series duly called pursuant to Section 11.02 at which a quorum is present may be adjourned from time to time by Persons entitled to vote at least a majority in principal amount of the Outstanding Securities of such series represented at the meeting; and the meeting may be held as so adjourned without further notice.

Section 11.06. COUNTING VOTES AND RECORDING ACTION OF MEETINGS.

The vote upon any resolution submitted to any meeting of Holders of Securities of any series shall be by written ballots on which shall be subscribed the signatures of the Holders of Securities of such series or of their representatives by proxy and the principal amounts and serial numbers of the Outstanding Securities of such series held or represented by them. The permanent chairman of the meeting shall appoint two inspectors of votes who shall count all votes cast at the meeting for or against any resolution and who shall make and file with the secretary of the meeting their verified written reports in duplicate of all votes cast at the meeting. A record, at least in duplicate, of the proceedings of each meeting of Holders of Securities of any series shall be prepared by the secretary of the meeting and there shall be attached to said record the original reports of the inspectors of votes on any vote by ballot taken thereat and affidavits by one or more persons having knowledge of the facts setting forth a copy of the notice of the meeting and showing that said notice was given as provided in Section 11.02 and, if applicable, Section 11.04. Each copy shall be signed and verified by the affidavits of the permanent chairman and secretary of the meeting and one such copy shall be delivered to the Company, and another to the Trustee to be preserved by the Trustee, the latter to have attached thereto the ballots voted at the meeting. Any record so signed and verified shall be conclusive evidence of the matters therein stated.

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Section 11.07. ARTICLE SUBJECT TO OTHER PROVISIONS.

Each provision of this Article 11 (whether or not expressly so stated) is subject to any other provision of this Indenture (or any Board Resolution or supplemental indenture establishing a series of Securities hereunder) that provides that Securities of different series constitute a single class.

ARTICLE 12.

CONVERSION OF SECURITIES

Section 12.01. APPLICABILITY OF ARTICLE.

The provisions of this Article shall be applicable to the Securities of any series which are convertible into shares of Common Stock of the Company, and the issuance of such shares of Common Stock upon the conversion of such Securities, except as otherwise specified as contemplated by Section 2.02 for the Securities of such series. This Article shall not be applicable to Securities of any series which are not convertible into shares of Common Stock of the Company.

Section 12.02. EXERCISE OF CONVERSION PRIVILEGE.

(a) In order to exercise a conversion privilege, the Holder of a Security of a series with such a privilege must surrender such Security to the Company at the office or agency maintained for that purpose pursuant to Section 4.02, accompanied by a duly executed Conversion Notice to the Company substantially in the form set forth on Exhibit B stating that the Holder elects to convert such Security or a specified portion thereof. Such Conversion Notice shall also state, if different from the name and address of such Holder, the name or names (with address) in which the certificate or certificates for shares of Common Stock which shall be issuable on such conversion shall be issued. Securities surrendered for conversion shall (if so required by the Company or the Trustee) be duly endorsed by, or accompanied by instruments of transfer satisfactory to the Company and the Trustee duly executed by, the registered Holder or its attorney duly authorized in writing.

(b) To the extent provided in Section 2.03(c), Securities surrendered for conversion during the period from the close of business on any Regular Record Date to the opening of business on the next succeeding Interest Payment Date (except in the case of any Security whose Stated Maturity is prior to such Interest Payment Date) shall be accompanied by payment by such Holder in immediately available funds to the Company of an amount equal to the interest to be received on such Interest Payment Date on the principal amount of the Securities being surrendered for conversion. However, to the extent provided in Section 2.03(b), Securities which have been called for redemption on a redemption date or which are repurchasable on a redemption date that occurs between the close of business on a Regular Record Date and the close of business on the Business Day immediately preceding such Interest Payment Date, shall not require such concurrent payment to the Company upon surrender for conversion, and, if such

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Securities are converted during the time period set forth in the preceding sentence, the Holders of such converted Securities shall be entitled to receive (and retain) any accrued interest on the Principal amount of such surrendered Securities, if any.

(c) To convert a Security a Holder must deliver to the Conversion Agent (i) a Conversion Notice, (ii) any payment required pursuant to Section 12.02(b) or pursuant to a Board Resolution and/or established in one or more indentures supplemental hereto setting forth the terms of such series of Security, (iii) any payment in respect of transfer or similar taxes, if required by Section 12.07, and (iv) the Security duly endorsed in accordance with such reasonable regulations as the Company may prescribe. The date on which the Holder satisfies all of those requirements is the “ Conversion Date ” for such Security. As soon as practicable after the Conversion Date, the Company shall issue and shall deliver or cause to be issued and delivered, at the office or agency at which such Security is surrendered, to such Holder or on its written order, a certificate or certificates for the number of full shares of Common Stock issuable upon the conversion of such Security (or specified portion thereof), in accordance with the provisions of such Board Resolution, Officers’ Certificate or supplemental indenture, and cash as provided therein in respect of any fractional share of such Common Stock otherwise issuable upon such conversion. Except as set forth above and subject to Section 2.14, no payment or adjustment shall be made upon any conversion on account of any interest accrued on the Securities (or any part thereof) surrendered for conversion or on account of any dividends on the Common Stock of the Company issued upon such conversion. The person in whose name the shares of Common Stock issued upon conversion is registered shall be deemed to be a holder of record of such Common Stock on the Conversion Date; provided, however, that no surrender of a Security on any Conversion Date when the stock transfer books of the Company shall be closed shall be effective to constitute the person or persons entitled to receive the shares of Common Stock upon conversion as the record holder or holders of such shares of Common Stock on such date, but such surrender shall be effective to constitute the person or persons thereof for all purposes at the close of business on the next succeeding day on which such stock transfer books are open; provided, further, that such conversion shall be at the conversion date in effect on the Conversion Date as if the stock transfer books of the Company had not been closed. Upon conversion of a Security, such person shall no longer be a Holder of such Security.

In the case of any Security which is converted in part only, upon such conversion the Company shall execute and the Trustee shall authenticate and deliver to or on the order of the Holder thereof, at the expense of the Company, a new Security or Securities of the same series, of authorized denominations, in aggregate principal amount equal to the unconverted portion of such Security.

Section 12.03. NO FRACTIONAL SHARES.

No fractional share of Common Stock of the Company shall be issued upon conversions of Securities of any series. If more than one Security shall be surrendered for conversion at one time by the same Holder, the number of full shares which shall be issuable upon conversion shall be computed on the basis of the aggregate principal amount of the Securities (or specified portions thereof to the extent permitted hereby) so surrendered. If, except for the provisions of this Section 12.03, any Holder of a Security or Securities would be entitled to a fractional share of Common Stock of the Company upon the conversion of such Security or Securities, or

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specified portions thereof, the Company shall pay to such Holder an amount in cash equal to the current market value of such fractional share computed, (i) if such Common Stock is listed or admitted to unlisted trading privileges on a national securities exchange, on the basis of the last reported sale price regular way on such exchange on the last trading day prior to the date of conversion upon which such a sale shall have been effected, or (ii) if such Common Stock is not at the time so listed or admitted to unlisted trading privileges on a national securities exchange, on the basis of the average of the bid and asked prices of such Common Stock in the over-the-counter market, on the last trading day prior to the date of conversion, as reported by the National Quotation Bureau, Incorporated or similar organization if the National Quotation Bureau, Incorporated is no longer reporting such information, or if not so available, the fair market price as determined by the Board of Directors. For purposes of this Section, “trading day” means each Monday, Tuesday, Wednesday, Thursday and Friday other than any day on which the Common Stock is not traded on the New York Stock Exchange, or if the Common Stock is not traded on the New York Stock Exchange, on the principal exchange or market on which the Common Stock is traded or quoted.

Section 12.04. ADJUSTMENT OF CONVERSION PRICE.

The conversion price of Securities of any series that is convertible into Common Stock of the Company shall be adjusted for any stock dividends, stock splits, reclassifications, combinations or similar transactions in accordance with the terms of the supplemental indenture or Board Resolutions setting forth the terms of the Securities of such series.

Whenever the conversion price is adjusted, the Company shall compute the adjusted conversion price in accordance with terms of the applicable Board Resolution or supplemental indenture and shall prepare an Officers’ Certificate setting forth the adjusted conversion price and showing in reasonable detail the facts upon which such adjustment is based, and such certificate shall forthwith be filed at each office or agency maintained for the purpose of conversion of Securities pursuant to Section 4.02 and, if different, with the Trustee.

Section 12.05. NOTICE OF CERTAIN CORPORATE ACTIONS.

In case:

(1) the Company shall declare a dividend (or any other distribution) on its Common Stock payable otherwise than in cash out of its retained earnings, which would require an adjustment to the conversion price of the Securities; or

(2) the Company authorizes the granting to the holders of all or substantially all of its Common Stock of rights, options or warrants to subscribe for or purchase any shares of capital stock of any class or of any other rights; or

(3) of any reclassification of the Common Stock of the Company (other than a subdivision or combination of its Outstanding shares of Common Stock, or of any consolidation, merger or share exchange to which the Company is a party and for which approval of any shareholders of the Company is required), or of the sale of all or substantially all of the assets of the Company; or

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(4) of the voluntary or involuntary dissolution, liquidation or winding up of the Company;

then the Company shall cause to be filed with the Trustee, and shall cause to be mailed to all Holders at their last addresses as they appear in the Securities Register, at least 20 days (or 10 days in any case specified in Clause (1) or (2) above) prior to the applicable record date hereinafter specified, a notice stating (i) the date on which a record is to be taken for the purpose of such dividend, distribution, rights, options or warrants, or, if a record is not to be taken, the date as of which the holders of Common Stock of record to be entitled to such dividend, distribution, rights, options or warrants are to be determined, or (ii) the date on which such reclassification, consolidation, merger, share exchange, sale, dissolution, liquidation or winding up is expected to become effective, and the date as of which it is expected that holders of Common Stock of record shall be entitled to exchange their shares of Common Stock for securities, cash or other property deliverable upon such reclassification, consolidation, merger, share exchange, sale, dissolution, liquidation or winding up. If at any time the Trustee shall not be the Conversion Agent, a copy of such notice shall also forthwith be filed by the Company with the Conversion Agent. Failure to give any such notice or any defect therein shall not affect the legality or validity of the proceedings described in clauses (1) through (4) of this Section 12.05.

Section 12.06. RESERVATION OF SHARES OF COMMON STOCK.

The Company shall at all times reserve and keep available, free from preemptive rights, out of its authorized but unissued Common Stock, for the purpose of effecting the conversion of Securities, the full number of shares of Common Stock of the Company then issuable upon the conversion of all Outstanding Securities of any series that has conversion rights.

Section 12.07. PAYMENT OF CERTAIN TAXES UPON CONVERSION.

Upon conversion, the Company shall pay any documentary, stamp or similar issue or transfer tax due on the issue of shares of Common Stock upon the conversion. However, the Holder shall pay any withholding tax or any such tax that is due because the shares are issued in a name other than the Holder’s name.

Section 12.08. NONASSESSABILITY.

The Company covenants that all shares of its Common Stock which may be issued upon conversion of Securities will upon issue in accordance with the terms hereof be duly and validly issued and fully paid and nonassessable.

Section 12.09. EFFECT OF CONSOLIDATION OR MERGER ON CONVERSION PRIVILEGE.

In case of any consolidation of the Company with, or merger of the Company into or with any other Person, or in case of any sale of all or substantially all of the assets of the Company, the company or the Person formed by such consolidation or the Person into which the Company shall have been merged or the Person which shall have acquired such assets, as the case may be, shall execute and deliver to the Trustee a supplemental indenture providing that the Holder of

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each Security then Outstanding of any series that is convertible into Common Stock of the Company shall have the right, which right shall be the exclusive conversion right thereafter available to said Holder (until the expiration of the conversion right of such Security), to convert such Security into the kind and amount of shares of stock or other securities or property (including cash) receivable upon such consolidation, merger or sale by a holder of the number of shares of Common Stock of the Company into which such Security might have been converted immediately prior to such consolidation, merger or sale, subject to compliance with the other provisions of this Indenture, such Security and such supplemental indenture. Such supplemental indenture shall provide for adjustments which shall be as nearly equivalent as may be practicable to the adjustments provided for in such Security. The above provisions of this Section shall similarly apply to successive consolidations, mergers or sales. It is expressly agreed and understood that anything in this Indenture to the contrary notwithstanding, if, pursuant to such merger, consolidation or sale, holders of outstanding shares of Common Stock of the Company do not receive shares of common stock of the surviving corporation but receive other securities, cash or other property or any combination thereof, Holders of Securities shall not have the right to thereafter convert their Securities into common stock of the surviving corporation or the corporation which shall have acquired such assets, but rather, shall have the right upon such conversion to receive the other securities, cash or other property receivable by a holder of the number of shares of Common Stock of the Company into which the Securities held by such holder might have been converted immediately prior to such consolidation, merger or sale, all as more fully provided in the first sentence of this Section 12.09. Anything in this Section 12.09 to the contrary notwithstanding, the provisions of this Section 12.09 shall not apply to a merger or consolidation of another corporation with or into the Company pursuant to which both of the following conditions are applicable: (i) the Company is the surviving corporation and (ii) the outstanding shares of Common Stock of the Company are not changed or converted into any other securities or property (including cash) or changed in number or character or reclassified pursuant to the terms of such merger or consolidation.

As evidence of the kind and amount of shares of stock or other securities or property (including cash) into which Securities may properly be convertible after any such consolidation, merger or sale, or as to the appropriate adjustments of the conversion prices applicable with respect thereto, the Trustee shall be furnished with and may accept the certificate or opinion of an independent certified public accountant with respect thereto; and, in the absence of bad faith on the part of the Trustee, the Trustee may conclusively rely thereon, and shall not be responsible or accountable to any Holder of Securities for any provision in conformity therewith or approved by such independent certified accountant which may be contained in said supplemental indenture.

Section 12.10. DUTIES OF TRUSTEE REGARDING CONVERSION.

Neither the Trustee nor any Conversion Agent shall at any time be under any duty or responsibility to any Holder of Securities of any series that is convertible into Common Stock of the Company to determine whether any facts exist which may require any adjustment of the conversion price, or with respect to the nature or extent of any such adjustment when made, or with respect to the method employed, whether herein or in any supplemental indenture, any resolutions of the Board of Directors or written instrument executed by one or more officers of the Company provided to be employed in making the same. Neither the Trustee nor any

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Conversion Agent shall be accountable with respect to the validity or value (or the kind or amount) of any shares of Common Stock of the Company, or of any securities or property, which may at any time be issued or delivered upon the conversion of any Securities and neither the Trustee nor any Conversion Agent makes any representation with respect thereto. Subject to the provisions of Section 7.01, neither the Trustee nor any Conversion Agent shall be responsible for any failure of the Company to issue, transfer or deliver any shares of its Common Stock or stock certificates or other securities or property upon the surrender of any Security for the purpose of conversion or to comply with any of the covenants of the Company contained in this Article Fourteen or in the applicable supplemental indenture, resolutions of the Board of Directors or written instrument executed by one or more duly authorized officers of the Company.

Section 12.11. REPAYMENT OF CERTAIN FUNDS UPON CONVERSION.

Any funds which at any time have been deposited by the Company or on its behalf with the Trustee or any other Paying Agent for the purpose of paying the principal of, and premium, if any, and interest, if any, on any of the Securities (including, but not limited to, funds deposited pursuant to Article 8 hereof) and which shall not be required for such purposes because of the conversion of such Securities as provided in this Article 12 shall after such conversion be repaid to the Company by the Trustee upon the Company’s written request.

ARTICLE 13.

MISCELLANEOUS

Section 13.01. TRUST INDENTURE ACT CONTROLS.

This Indenture is subject to the provisions of the TIA that are required to be part of this Indenture and shall, to the extent applicable, be governed by such provisions. If any provision of this Indenture limits, qualifies or conflicts with another provision which is required to be included in this Indenture by the TIA, the required provision shall control.

Section 13.02. NOTICES.

Any notice or communication by the Company or the Trustee to the other is duly given if in writing and delivered in person or mailed by first class mail (registered or certified, return receipt requested), telecopier or overnight air courier guaranteeing next day delivery, to the others’ address:

If to the Company:

Radian Group Inc.

1601 Market Street

Philadelphia, PA 19103

Facsimile No.: (215) 963-9658

Attention: Chief Financial Officer

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If to the Trustee:

Wells Fargo Bank, NA,

9062 Old Annapolis Road

MAC N2702-011

Columbia, MD 21045-1951,

Public Finance

Facsimile No: (410) 715-3791

Attention: Frances Morgan Okougbo, Vice President

The Company or the Trustee, by notice to the others may designate additional or different addresses for subsequent notices or communications. Notices and demands to or upon the Company by any Holders shall be made in accordance with Section 4.02.

Except as otherwise provided in this Indenture, any applicable Security or any supplemental indenture, all notices and communications (other than those sent to Holders) shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when receipt acknowledged or confirmed, if telecopied; and the next Business Day after timely delivery to the courier, if sent by overnight air courier guaranteeing next day delivery.

Any notice or communication to a Holder shall be mailed by first class mail or by overnight courier guaranteeing next day delivery to its address shown on the register kept by the Registrar. Any notice or communication shall also be so mailed to any Person described in TIA § 313(c), to the extent required by the TIA. Failure to mail a notice or communication to a Holder or any defect in it shall not affect its sufficiency with respect to other Holders.

If a notice or communication is mailed in the manner provided above within the time prescribed, it is duly given, whether or not the addressee receives it.

If the Company mails a notice or communication to Holders, it shall mail a copy to the Trustee and each Agent at the same time.

Section 13.03. COMMUNICATION BY HOLDERS OF SECURITIES WITH OTHER HOLDERS OF SECURITIES.

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 will have the protection of TIA § 312(c).

Section 13.04. CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.

Upon any request or application by the Company to the Trustee to take any action under this Indenture, the Company shall furnish to the Trustee:

(a) an Officers’ Certificate in form and substance reasonably satisfactory to the Trustee which shall include the statements set forth in Section 13.05 hereof; and

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(b) an Opinion of Counsel in form and substance reasonably satisfactory to the Trustee which shall include the statements set forth in Section 13.05 hereof.

Section 13.05. STATEMENTS REQUIRED IN CERTIFICATE OR OPINION.

Each certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture (other than a certificate provided pursuant to TIA § 314(a)(4)) shall comply with the provisions of TIA § 314(e) and shall include:

(1) a statement that the Person making such certificate or opinion has read such covenant or condition;

(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 such Person, he or she has made such examination or investigation as is necessary to enable him or her to express an informed opinion as to whether or not such covenant or condition has been satisfied; and

(4) a statement as to whether or not, in the opinion of such Person, such condition or covenant has been satisfied.

Section 13.06. RULES BY TRUSTEE AND AGENTS.

The Trustee may make reasonable rules for action by or at a meeting of Holders. The Registrar or Paying Agent may make reasonable rules and set reasonable requirements for its functions.

Section 13.07. NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES AND STOCKHOLDERS.

No past, present or future director, officer, employee, incorporator or stockholder of the Company, as such, shall have any liability for any obligations of the Company under the Securities, this Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Securities by accepting a Security waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Securities.

Section 13.08. STAY, EXTENSION AND USURY LAWS.

The Company covenants (to the extent that it may lawfully do so) that it shall not at any time insist upon, plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay, extension or usury law wherever enacted, now or at any time hereafter in force, that 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 shall not, by resort to any such law, hinder, delay or impede the execution of any power herein granted to the Trustee, but shall suffer and permit the execution of every such power as though no such law has been enacted.

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Section 13.09. GOVERNING LAW.

THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND ENFORCE THIS INDENTURE AND THE SECURITIES.

Section 13.10. NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.

This Indenture may not be used to interpret any other indenture, loan or debt agreement of the Company or its Subsidiaries or of any other Person. Any such indenture, loan or debt agreement may not be used to interpret this Indenture.

Section 13.11. SUCCESSORS.

All agreements of the Company in this Indenture and the Securities shall bind its successors. All agreements of the Trustee in this Indenture shall bind its successors.

Section 13.12. SEVERABILITY.

In case any provision in this Indenture or in the Securities is invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions will not in any way be affected or impaired thereby.

Section 13.13. COUNTERPART ORIGINALS.

The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. This Indenture will be effective when each party shall have signed and delivered (including delivery by facsimile transmission), one or more counterparts to the other, but it shall not be necessary for both parties to sign the same counterpart.

Section 13.14. TABLE OF CONTENTS, HEADINGS, ETC.

The Table of Contents and Headings of the Articles and Sections of this Indenture have been inserted for convenience of reference only, are not to be considered a part of this Indenture and will in no way modify or restrict any of the terms or provisions hereof.

[Signature Page Follows]

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SIGNATURES

IN WITNESS WHEREOF, the parties have executed this Indenture as of the date first written above.

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EXHIBIT A

(Face of Note)

     % [Series      ] Senior Note due [              ]

[Insert the Global Note Legend, if applicable pursuant to the provisions of the Indenture]

RADIAN GROUP INC.

promises to pay to                      or registered assigns, the principal sum of                     

Exhibit 4.2

OFFICERS’ CERTIFICATE OF

DESIGNATION OF TERMS OF SECURITIES

Each of the undersigned officers (each an “Officer” and collectively the “Officers”) of Radian Group Inc., a Delaware corporation (the “Company”), hereby certifies pursuant to Sections 2.02 and 2.05 of the Senior Indenture dated as of June 7, 2005 (the “Indenture”), by and between the Company and Wells Fargo Bank, NA, as trustee (the “Trustee”), relating to the Company’s 5.375% Senior Notes due 2015(the “Notes”), that:

1. Pursuant to the authority granted to them by the Company’s Board of Directors on November 9, 2004, the Officers do hereby approve the issuance and sale by the Company of $250,000,000 in aggregate principal amount of securities, which are hereby approved and established as a series of securities (the “Notes”) under Section 2.02(b) of the Indenture, titled “5.375% Senior Notes due 2015” and having the specific terms set forth on Attachment A hereto, “Terms of the Securities.”

2. Each Officer has read all of the provisions of the Indenture relating to the conditions precedent to, or covenants applicable to, the issuance of securities under the Indenture, and the definitions in the Indenture relating thereto, and the authentication by the Trustee of the Global Note therefore.

3. Each Officer has examined the Indenture and such other related documents as such Officer deemed necessary or appropriate to enable him to give this Officers’ Certificate.

4. In each Officer’s opinion, such Officer has made such examination or investigation as is necessary to enable such Officer to express an informed opinion as to whether all conditions precedent provided for in the Indenture relating to the issuance of the Notes and the authentication by the Trustee of the Global Note therefore (including any covenant compliance with which constitutes a condition precedent) have been complied with.

5. In each Officer’s opinion, all such conditions precedent to the issuance of the Notes under the Indenture have been complied with.

All capitalized terms in this Officers’ Certificate not otherwise defined in this Officers’ Certificate (including Attachment A hereto) have the meanings assigned to them in the Indenture.

[Signature Page Follows]

IN WITNESS WHEREOF , the undersigned have hereunto signed their names as of this 7 ^th day of June 2005.

I, Tami Bohm, the duly elected and incumbent Assistant Secretary of the Company, do hereby certify on behalf of the Company that: (i) C. Robert Quint is the duly elected, qualified and acting Executive Vice President and Chief Financial Officer of the Company, (ii) Terry Latimer is the duly elected, qualified and acting Vice President and Treasurer of the Company, and (iii) the signatures of C. Robert Quint and Terry Latimer set forth above are their genuine signatures.

IN WITNESS WHEREOF , the undersigned has hereunto signed her name as of this 7 ^th day of June 2005.