UNDERWRITING AGREEMENT

Exhibit 4.1

GENERAL DYNAMICS CORPORATION

Debt Securities

UNDERWRITING AGREEMENT

June 19, 2009

To the Representatives named in

Schedule I hereto of the

Underwriters named in

Schedule II hereto

Ladies and Gentlemen:

1. Introduction . General Dynamics Corporation, a Delaware corporation (the “ Company ”), proposes, subject to the terms and conditions stated herein, to issue and sell to the Underwriters named in Schedule II hereto (the “ Underwriters ”), for whom you are acting as representatives (the “ Representatives ”), the principal amount of its debt securities identified in Schedule I hereto (the “ Notes ”), to be unconditionally guaranteed by the subsidiaries of the Company identified on Schedule IV hereto (collectively, the “ Guarantors ” and, together with the Company, the “ Issuers ”). The Securities will be issued pursuant to the indenture dated as of August 27, 2001, by and among the Company, the Guarantors thereunder and The Bank of New York Mellon (formerly The Bank of New York), as trustee (the “ Indenture ”). The obligations of the Company under the Indenture and the Notes will be unconditionally guaranteed (the “ Guarantees ” and together with the Notes, the “ Securities ”), on a joint and several basis, by each of the Guarantors in accordance with the terms of the Indenture.

The Issuers have prepared and filed with the Securities and Exchange Commission (the “ Commission ”) under the Securities Act of 1933, as amended, and the rules and regulations of the Commission thereunder (collectively, the “ Securities Act ”) a registration statement on Form S-3 (File No. 333-155980), including a prospectus (the “ Basic Prospectus ”), relating to debt securities and guarantees thereof to be issued from time to time by the Issuers. The Issuers have also filed with, or transmitted for filing to, or shall promptly hereafter file with or transmit for filing to, the Commission a prospectus supplement specifically relating to the Securities pursuant to Rule 424 under the Securities Act (the “ Prospectus Supplement ”). The term “ Registration Statement ” means the registration statement, as amended at the time it becomes effective, including the information, if any, deemed pursuant to Rule 430A, 430B or 430C under the Securities Act to be part of the registration statement at the time of its effectiveness (“ Rule 430 Information ”). The term “ Prospectus ” means the Basic Prospectus as supplemented by the prospectus supplement specifically relating to

the Securities in the form first used (or made available upon request of purchasers pursuant to Rule 173 under the Securities Act) in connection with confirmation of sales of the Securities. The term “ Preliminary Prospectus ” means the preliminary prospectus supplement specifically relating to the Securities together with the Basic Prospectus. As used herein, the terms “Basic Prospectus,” “Prospectus” and “Preliminary Prospectus” shall include in each case the documents, if any, incorporated by reference therein. The terms “supplement,” “amendment” and “amend” as used herein with respect to the Registration Statement, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents filed by the Company under the Securities and Exchange Act of 1934, as amended, and the rules and regulations of the Commission thereunder (the “ Exchange Act ”) subsequent to the date of the Underwriting Agreement which are deemed to be incorporated by reference therein. For purposes of this Agreement, the term “ Effective Time ” means the effective date of the Registration Statement with respect to the offering of Securities, as determined for the Company pursuant to Section 11 of the Securities Act and Item 512 of Regulation S-K, as applicable.

At or prior to the time when sales of the Securities will be first made (the “ Time of Sale ”), the Company will prepare certain information (collectively, the “ Time of Sale Information ”) which information will be identified in Schedule III to the Underwriting Agreement for such offering of Securities as constituting part of the Time of Sale Information.

The Issuers hereby agree with the Underwriters as follows:

2. Representations and Warranties of the Issuers .

(a) The Company represents and warrants to and agrees with each of the Underwriters that:

(i) The Registration Statement is an “automatic shelf registration statement” as defined under Rule 405 of the Securities Act that has been filed with the Commission not earlier than three years prior to the date hereof; and no notice of objection of the Commission to the use of such registration statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act has been received by the Company. No order suspending the effectiveness of the Registration Statement has been issued by the Commission and no proceeding for that purpose or pursuant to Section 8A of the Securities Act against the Company or related to the offering has been initiated or threatened by the Commission; as of the Effective Time, the Registration Statement complied in all material respects with the Securities Act and the Trust Indenture Act of 1939, as amended, and the rules

2

and regulations of the Commission thereunder (collectively, the “ Trust Indenture Act ”), and did not or will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein not misleading; and as of the date of the Prospectus and any amendment or supplement thereto and as of the Closing Date, the Prospectus complied in all material respects with the Securities Act and did not and will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to (i) that part of the Registration Statement that constitutes the Statement of Eligibility and Qualification (Form T-1) of the Trustee under the Trust Indenture Act or (ii) any statements or omissions in the Registration Statement and the Prospectus and any amendment or supplement thereto made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use therein.

(ii) The Time of Sale Information, at the Time of Sale and at the Closing Date did not and will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in such Time of Sale Information.

(iii) The Issuers (including their agents and representatives, other than the Underwriters in their capacity as such) have not prepared, made, used, authorized, approved or referred to and will not prepare, make, use, authorize, approve or refer to any “written communication” (as defined in Rule 405 under the Securities Act) that constitutes an offer to sell or solicitation of an offer to buy the Securities (each such communication by the Company or its agents and representatives (other than a communication referred to in clauses (i), (ii) and (iii) below) an “ Issuer Free Writing Prospectus ”) other than (i) any document not constituting a prospectus pursuant to Section

3

2(a)(10)(a) of the Securities Act or Rule 134 under the Securities Act, (ii) the Preliminary Prospectus, (iii) the Prospectus, (iv) the documents, other than the Preliminary Prospectus, listed on Schedule III to the Underwriting Agreement as constituting part of the Time of Sale Information and (v) any electronic road show or other written communications, in each case approved in writing in advance by the Representatives. Each Issuer Free Writing Prospectus complied in all material respects with the Securities Act, has been or will be (within the time period specified in Rule 433) filed in accordance with the Securities Act (to the extent required thereby) and, when taken together with the Preliminary Prospectus accompanying, or delivered prior to delivery of, or filed prior to the first use of such Issuer Free Writing Prospectus, did not, and at the Closing Date will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to any statements or omissions made in each such Issuer Free Writing Prospectus in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in any Issuer Free Writing Prospectus.

(iv) The documents incorporated by reference in the Registration Statement, the Prospectus and the Time of Sale Information when filed with the Commission, conformed or will conform, as the case may be, in all material respects with the requirements of the Exchange Act, and did not and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading;

(v) The Securities have been duly authorized by the Company; the Guarantees have been duly authorized by the applicable Guarantors; and when the Securities are delivered and paid for pursuant to this Agreement on the Closing Date (as defined below) assuming due authentication by the trustee under the Indenture, such Securities will have been duly executed, issued and delivered by the Issuers and will conform in all material respects to the description thereof contained in the Registration Statement, the Time of Sale Information and the Prospectus and the provisions of the Indenture and will constitute

4

valid and legally binding obligations of the Issuers, in each case enforceable in accordance with their respective terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles.

(vi) Since the date as of which information is given in the Registration Statement, the Time of Sale Information and the Prospectus, (a) there has not been any material adverse change, or any development reasonably likely to have a material adverse change, in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise, whether or not arising in the ordinary course of business, and (b) there have been no transactions entered into by the Company or any of its subsidiaries which, individually or in the aggregate, are material to the Company and its subsidiaries, considered as one enterprise, other than those transactions in the ordinary course of business, except, in each case, as otherwise set forth or contemplated in the Registration Statement, the Time of Sale Information and the Prospectus.

(vii) The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of its jurisdiction of incorporation, with power and authority (corporate and other) to own its properties and conduct its business as described in the Registration Statement, the Time of Sale Information and the Prospectus, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such qualification, except where the failure to be so qualified is not reasonably likely to have a material adverse change in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise.

(viii) Each Guarantor has been duly incorporated and is validly existing as a corporation in good standing under the laws of its jurisdiction of incorporation, with power and authority (corporate and other) to own its properties and conduct its business as described in the Registration Statement, the Time of Sale Information and the Prospectus, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it

5

owns or leases properties or conducts any business so as to require such qualification, except where the failure to be so qualified is not reasonably likely to have a material adverse change in the condition (financial or otherwise), financial position, or results of operations of the applicable Guarantor and its subsidiaries, considered as one enterprise.

(ix) The Company has an authorized capitalization as set forth in the Registration Statement, the Time of Sale Information and the Prospectus, and all of the issued shares of capital stock of the Company have been duly and validly authorized and issued, are fully paid and non-assessable; and all of the issued shares of capital stock of each Guarantor have been duly and validly authorized and issued, are fully paid and non-assessable and (except for directors’ qualifying shares) are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims.

(x) The execution, delivery and performance of the Indenture and this Agreement and the issuance and sale of the Securities and the compliance by the Company with all of the provisions thereof and the consummation by the Company of the transactions contemplated herein will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any material indenture, mortgage, deed of trust, loan agreement or other material agreement or instrument to which the Company is a party or by which the Company is bound or to which any of the property or assets of the Company is subject, nor will such actions result in any violation of the provisions of the Certificate of Incorporation or By-laws of the Company or, to the best of its knowledge, any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its properties; and no consent, approval, authorization, order, decree, registration or qualification of or with any such court or governmental agency or body is required for the issuance and sale of the Securities or the consummation by the Company of the transactions contemplated by this Agreement, except such consents, approvals, authorizations, registrations or qualifications as may be required under state or foreign securities or “blue sky” laws or as have been obtained under the Securities Act or the Trust Indenture Act in connection with the issuance and sale of the Securities by the Issuers; and each of the Issuers has full power and authority to authorize, issue and sell the Securities as contemplated by this Agreement.

6

(xi) The execution, delivery and performance of the Indenture and this Agreement and the issuance and sale of the Securities and the compliance by each of the Guarantors with all of the provisions thereof and the consummation by each of the Guarantors of the transactions contemplated herein will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which any of the Guarantors are a party or by which any of the Guarantors are bound or to which any of the property or assets of any of the Guarantors are subject, except where such conflict, breach, violation or default is not reasonably likely to result in a material adverse change in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise, nor will such actions result in any violation of the provisions of the Certificate of Incorporation or By-laws of any of the Guarantors or, to the best of the Company’s knowledge, any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Guarantors or any of their respective properties; and no consent, approval, authorization, order, decree, registration or qualification of or with any such court or governmental agency or body is required for the issuance of any of the Guarantees or the consummation by any of the Guarantors of the transactions contemplated by this Agreement, except such consents, approvals, authorizations, registrations or qualifications as may be required under state or foreign securities or “blue sky” laws or as have been obtained under the Securities Act or the Trust Indenture Act in connection with the issuance of the Guarantees.

(xii) This Agreement has been duly authorized, executed and delivered by each of the Issuers.

(xiii) The Indenture has been duly qualified under the Trust Indenture Act and has been duly authorized, executed and delivered by each of the Issuers and is a valid and legally binding obligation of the Issuers, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles.

(xiv) None of the Issuers is (A) in violation of its Certificate of Incorporation or By-laws or (B) in default in the

7

performance or observance of any obligation, agreement, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound, where such default is reasonably likely to result in a material adverse change in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise.

(xv) Other than as set forth in the Registration Statement, the Time of Sale Information and the Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries is a party or of which any property of the Company or any of its subsidiaries is the subject which is reasonably likely by the Company to have, individually or in the aggregate, a material adverse change in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise; and, to the best of the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others.

(xvi) The Company is not and, after giving effect to the offering and sale of the Securities, will not be an “investment company,” as such term is defined in the Investment Company Act of 1940, as amended (the “ Investment Company Act ”).

(xvii) The financial statements included or incorporated by reference in the Registration Statement, the Time of Sale Information and Prospectus present fairly, in all material respects, the financial position of the Company and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown, and, except as otherwise disclosed in the Registration Statement, the Time of Sale Information and the Prospectus, such financial statements have been prepared in conformity with accounting principles generally accepted in the United States; any schedules included in the Registration Statement, the Time of Sale Information and the Prospectus present fairly, in all material respects, the information required to be stated therein.

(xviii) Except as disclosed in the Registration Statement, the Time of Sale Information and the Prospectus, since the date of the latest audited financial statements included in the Registration Statement, the Time of Sale Information and the Prospectus, there

8

has been no material adverse change, nor any development reasonably likely to have a material adverse change, in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise.

(xix) KPMG LLP, who has certified certain financial statements of the Company and its subsidiaries, is, to the best of the Company’s knowledge, an independent registered public accounting firm with respect to the Company and its subsidiaries within the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (United States) and as required by the Securities Act.

(xx) The Company is not an “ineligible issuer” and is a “well-known seasoned issuer”, in each case as defined under the Securities Act, in each case at the times specified in the Securities Act in connection with the offering of the Securities.

(xxi) The Company and its subsidiaries maintain an effective system of “disclosure controls and procedures” (as defined in Rule 13a-15(e) of the Exchange Act) and have carried out evaluations of the effectiveness of their disclosure controls and procedures as required by Rule 13a-15 of the Exchange Act.

(xxii) The Company and its subsidiaries maintain systems of “internal control over financial reporting” (as defined in Rule 13a-15(f) of the Exchange Act) that comply with the requirements of the Exchange Act. Except as disclosed in the Registration Statement, the Time of Sale Information and the Prospectus, there are no material weaknesses in the Company’s internal controls.

(b) Each Guarantor, severally, and not jointly, represents and warrants to and agrees with the Underwriters that:

(i) The Registration Statement is an “automatic shelf registration statement” as defined under Rule 405 of the Securities Act that has been filed with the Commission not earlier than three years prior to the date hereof; and no notice of objection of the Commission to the use of such registration statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act has been received by the Company. No order suspending the effectiveness of the Registration Statement has been issued by the Commission and no proceeding for that

9

purpose or pursuant to Section 8A of the Securities Act against the Company or related to the offering has been initiated or threatened by the Commission; as of the Effective Time, the Registration Statement complied in all material respects with the Securities Act and the Trust Indenture Act, and did not or will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein not misleading; and as of the date of the Prospectus and any amendment or supplement thereto and as of the Closing Date, the Prospectus did not and will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that such Guarantor makes no representation and warranty with respect to (i) that part of the Registration Statement that constitutes the Statement of Eligibility and Qualification (Form T-1) of the Trustee under the Trust Indenture Act or (ii) any statements or omissions in the Registration Statement and the Prospectus and any amendment or supplement thereto made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use therein.

(ii) The Time of Sale Information, at the Time of Sale and at the Closing Date did not and will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the applicable Guarantor makes no representation and warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the applicable Guarantor in writing by such Underwriter through the Representatives expressly for use in such Time of Sale Information.

(iii) Each Guarantor (including its agents and representatives, other than the Underwriters in their capacity as such) has not prepared, made, used, authorized, approved or referred to and will not prepare, make, use, authorize, approve or refer to any “written communication” (as defined in Rule 405 under the Securities Act) that constitutes an offer to sell or solicitation of an offer to buy the Securities other than (i) any document not constituting a prospectus pursuant to Section 2(a)(10)(a) of the Securities Act or Rule 134 under the Securities

10

Act, (ii) the Preliminary Prospectus, (iii) the Prospectus, (iv) the documents, other than the Preliminary Prospectus, listed on Schedule III to the Underwriting Agreement as constituting the Time of Sale Information and (v) any electronic road show or other written communications, in each case approved in writing in advance by the Representatives. Each Issuer Free Writing Prospectus complied in all material respects with the Securities Act, has been or will be (within the time period specified in Rule 433) filed in accordance with the Securities Act (to the extent required thereby) and, when taken together with the Preliminary Prospectus accompanying, or delivered prior to delivery of, or filed prior to the first use of such Issuer Free Writing Prospectus, did not, and at the Closing Date will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that such Guarantor makes no representation and warranty with respect to any statements or omissions made in each such Issuer Free Writing Prospectus in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in any Issuer Free Writing Prospectus.

(iv) The applicable Guarantee has been duly authorized by the Guarantor; and when such Guarantee is delivered pursuant to this Agreement on the Closing Date, such Guarantee will have been duly executed, issued and delivered and will conform in all material respects to the description thereof contained in the Registration Statement, the Time of Sale Information and the Prospectus and the provisions of the Indenture and will constitute a valid and legally binding obligation of the Guarantor, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles.

(v) The Guarantor has been duly incorporated and is validly existing as a corporation in good standing under the laws of its jurisdiction of incorporation, with power and authority (corporate and other) to own its properties and conduct its business as described in the Registration Statement, the Time of Sale Information and the Prospectus, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it

11

owns or leases properties or conducts any business so as to require such qualification, except where the failure to be so qualified is not reasonably likely to have a material adverse change, in the condition (financial or otherwise), financial position or results of operations of the Guarantor and its subsidiaries, considered as one enterprise.

(vi) The execution, delivery and performance of the Indenture and this Agreement and the issuance of the applicable Guarantee and the compliance by the Guarantor with all of the provisions thereof and the consummation by the Guarantor of the transactions contemplated herein will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Guarantor is a party or by which the Guarantor is bound or to which any of the property or assets of the Guarantor is subject, except where such conflict, breach, violation or default is not reasonably likely to result in a material adverse change in the condition (financial or otherwise), financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, considered as one enterprise, nor will such action result in any violation of the provisions of the Certificate of Incorporation or By-laws of the Guarantor or, to the best of its knowledge, any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Guarantor or any of its properties; and no consent, approval, authorization, order, decree, registration or qualification of or with any such court or governmental agency or body is required for the issuance of the applicable Guarantee or the consummation by the Guarantor of the transactions contemplated by this Agreement, except such consents, approvals, authorizations, registrations or qualifications as may be required under state or foreign securities or “blue sky” laws or as have been obtained under the Securities Act or the Trust Indenture Act in connection with the issuance and sale of the Securities by the Issuers; and the Guarantor has full power and authority to authorize and issue the Guarantee as contemplated by this Agreement.

(vii) This Agreement has been duly authorized, executed and delivered by the Guarantor.

(viii) The Indenture has been duly qualified under the Trust Indenture Act and has been duly authorized, executed and delivered by the Guarantor and is a valid and legally binding

12

obligation of the Guarantor, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles.

(ix) The Guarantor is not an “ineligible issuer” as defined under the Securities Act at the times specified in the Securities Act in connection with the offering of the Securities.

3. Purchase, Sale and Delivery of Initial Securities . On the basis of the representations, warranties and agreements herein contained, but subject to the terms and conditions herein set forth, the Company agrees to sell to the several Underwriters, and each Underwriter agrees to purchase, severally and not jointly, from the Company, the respective principal amount of Securities set forth opposite such Underwriter’s name on Schedule II hereto at the purchase price set forth thereon, plus accrued interest, if any, from the date specified in Schedule I hereto to the date of payment and delivery, and the Guarantors agree to issue the Guarantees with respect to the Securities.

The Company understands that the several Underwriters intend (i) to make a public offering of their respective portions of the Securities and (ii) initially to offer the Securities upon the terms set forth in the Registration Statement, the Time of Sale Information and the Prospectus.

The Issuers will deliver, against payment of the purchase price, the Securities in the form of one or more permanent global securities in definitive form (the “ Global Securities ”) deposited with the Trustee as custodian for The Depository Trust Company (“ DTC ”) and registered in the name of Cede & Co. as nominee for DTC. Interests in any permanent Global Securities will be held only in book-entry form through DTC, except in the limited circumstances described in the Registration Statement, the Time of Sale Information and the Prospectus. Payment for the Securities shall be made by the Underwriters by wire transfer in immediately available funds to an account specified by the Company on the date and at the time set forth in Schedule I hereto, or at such other time not later than five full business days thereafter as the Underwriters and the Company may agree in writing, such time being herein referred to as the “ Closing Date ,” against delivery to the Trustee as custodian for DTC of the Global Securities representing all of the Securities. The Global Securities will be made available for checking by the Representatives at such place as the Representatives and the Company agree not later than 1:00 P.M. New York City Time, on the Business Day prior to the Closing Date.

The Company acknowledges and agrees that the Underwriters are acting solely in the capacity of an arm’s length contractual counterparty to the Company

13

and not as a financial advisor or a fiduciary to, or an agent of, the Company or any other person, in each case, with respect to the offering of Securities contemplated hereby (including in connection with determining the terms of the offering). Additionally, no such Underwriter is advising the Company or any other person as to any legal, tax, investment, accounting or regulatory matters in any jurisdiction with respect to the offering of Securities contemplated hereby. The Company shall consult with its own advisors concerning such matters and shall be responsible for making its own independent investigation and appraisal of the offering of Securities contemplated hereby, and such Underwriters shall have no responsibility or liability to the Company with respect to any information or advice received by the Company from its own advisors concerning such matters or arising out of its own independent investigation and appraisal of the offering of Securities contemplated herby. Any review by such Underwriters named in the Underwriting Agreement of the Company, the transactions contemplated thereby or other matters relating to such transactions will be performed solely for the benefit of the Underwriters and shall not be on behalf of the Company.

4. Certain Agreements of the Issuers . The Issuers, jointly and severally, agree with each of the several Underwriters that:

(a) The Issuers will (i) pay the registration fees for this offering within the time period required by Rule 456(b)(1)(i) under the Securities Act (without giving effect to the proviso therein) and in any event prior to the Closing Date and (ii) file the Prospectus in a form approved by the Representatives pursuant to Rule 424 under the Securities Act not later than the Commission’s close of business on the second Business Day following the date of determination of the offering price of the Securities or, if applicable, such earlier time as may be required by Rule 424(b) and Rule 430A, 430B or 430C under the Securities Act. The Company will file any Issuer Free Writing Prospectus (including the Term Sheet in the form of Schedule VII to the Underwriting Agreement) to the extent required by Rule 433 under the Securities Act; and the Company will furnish copies of the Prospectus and each Issuer Free Writing Prospectus (to the extent not previously delivered) to the Underwriters in New York City prior to 10:00 A.M., New York City time, on the business day next succeeding the date of this Agreement in such quantities as the Representatives may reasonably request.

(b) The Issuers will advise the Representatives promptly after obtaining knowledge, and, if requested by the Representatives, confirm in writing, (i) when any amendment to the Registration Statement has been filed or becomes effective; (ii) when any supplement to the Prospectus or any amendment to the Prospectus or any Issuer Free Writing Prospectus has been filed; (iii) of any request by the Commission for any amendment to the Registration Statement or any amendment or supplement to the

14

Prospectus or the receipt of any comments from the Commission relating to the Registration Statement or any other request by the Commission for any additional information; (iv) of the issuance by the Commission of any order suspending the effectiveness of the Registration Statement or preventing or suspending the use of any Preliminary Prospectus or the Prospectus or the initiation or threatening of any proceeding for that purpose or pursuant to Section 8A of the Securities Act; (v) of the occurrence of any event within the Prospectus Delivery Period (as defined below in Section 4(c)) as a result of which (A) the Prospectus as then amended or supplemented would include any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances existing when the Prospectus is delivered to a Purchaser, not misleading, or (B) the Time of Sale Information or any Issuer Free Writing Prospectus as then amended and supplemented would include any untrue statement of a material fact or omit to state a material necessary in order to make the statements therein, in the light of the circumstances existing when the Time of Sale Information or any Issuer Free Writing Prospectus is delivered to a Purchaser, not misleading; (vi) of the receipt by the Company of any notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act and (vii) of the receipt by the Company of any notice with respect to any suspension of the qualification of the Securities for offer and sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and the Company will use its reasonable best efforts to prevent the issuance of any such order suspending the effectiveness of the Registration Statement (as described in clause (iv) above), preventing or suspending the use of any Preliminary Prospectus or the Prospectus (as described in clause (iv) above) or suspending any such qualification of the Securities (as described in clause (iv) above) and, if any such order is issued, will obtain as soon as possible the withdrawal thereof.

(c) The Company will deliver, without charge, to each Underwriter during the Prospectus Delivery Period (as defined below), as many copies of the Prospectus (including all amendments and supplements thereto) and each Issuer Free Writing Prospectus (if applicable) as the Representatives may reasonably request. As used herein, the term “ Prospectus Delivery Period ” means such period of time after the first date of the public offering of the Securities as in the opinion of counsel for the Underwriters a prospectus relating to the Securities is required by law to be delivered (or required to be delivered but for Rule 172 under the Securities Act) in connection with sales of the Securities by any Underwriter or dealer.

15

(d) Before making, preparing, using, authorizing, approving, referring to or filing any Issuer Free Writing Prospectus during the Prospectus Delivery Period, and before filing any amendment or supplement to the Registration Statement or the Prospectus, the Company will furnish to the Representatives and counsel for the Underwriters, within a reasonable time prior to the filing thereof with the Commission, a copy of the proposed Issuer Free Writing Prospectus, amendment or supplement for review and will not during the Prospectus Delivery Period make, prepare, use, authorize, approve, refer to or file any such Issuer Free Writing Prospectus or file any such proposed amendment or supplement (other than any document required to be filed with the Commission under the Exchange Act and incorporated by reference into the Registration Statement or Prospectus) to which the Representatives reasonably objects.

(e) If at any time prior to the Closing Date (i) any event shall occur or condition shall exist as a result of which the Time of Sale Information as then amended or supplemented would include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances then prevailing, not misleading or (ii) it is necessary to amend or supplement the Time of Sale Information to comply with law, the Company will promptly notify the Underwriters thereof and forthwith prepare and, subject to paragraph (c) above, file with the Commission (to the extent required) and furnish to the Underwriters and to such dealers as the Representatives may designate, such amendments or supplements to the Time of Sale Information as may be necessary so that the statements in the Time of Sale Information as so amended or supplemented will not, in the light of the circumstances then prevailing, be misleading or so that the Time of Sale Information will comply with law.

(f) If during the Prospectus Delivery Period (i) any event shall occur or condition shall exist as a result of which the Prospectus as then amended or supplemented would include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances existing when the Prospectus is delivered to a purchaser, not misleading or (ii) it is necessary to amend or supplement the Prospectus to comply with law, the Company will immediately notify the Underwriters thereof and forthwith prepare and, subject to paragraph (c) above, file with the Commission and furnish to the Underwriters and to such dealers as the Representatives may designate, such amendments or supplements to the Prospectus as may be necessary so that the statements in the Prospectus as so amended or supplemented will not, in the light of the circumstances existing when the Prospectus is delivered to a purchaser, be misleading or so that the Prospectus will comply with law.

16

(g) The Issuers will arrange for the qualification of the Securities for sale and the determination of their eligibility for investment under the laws of such states in the United States as the Representatives may reasonably designate and will continue such qualifications in effect so long as reasonably required for the distribution of the Securities by the Underwriters; provided that in connection therewith none of the Issuers will be required to qualify as a foreign corporation or to file a general consent to service of process in any such state.

(h) The Company will make generally available to its security holders and the Representatives an earnings statement that satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 of the Commission promulgated thereunder covering a period of at least twelve months beginning with the first fiscal quarter of the Company occurring after the “ effective date ” (as defined in Rule 158) of the Registration Statement.

(i) During the period of two years after the Closing Date, none of the Issuers will be or become, an open-end investment company, unit investment trust or face-amount certificate company that is or is required to be registered under Section 8 of the Investment Company Act.

(j) The Company will pay all expenses incidental to the performance of the Issuers’ obligations under this Agreement and the Indenture including (i) the fees and expenses of the Trustee and its professional advisers; (ii) all expenses in connection with the execution, issue, authentication, packaging and delivery of the Securities, the preparation and printing of this Agreement, the Securities, the Indenture, the Registration Statement, the Preliminary Prospectus, any Issuer Free Writing Prospectus, any Time of Sale Information and the Prospectus and amendments and supplements thereto, and any other document relating to the issuance, offer, sale and delivery of the Securities; (iii) the cost of any advertising approved by the Company in connection with the issue of the Securities, (iv) any expenses (including the reasonable fees and disbursements of counsel) incurred in connection with qualification of the Securities for sale under the laws of such jurisdictions as the Representatives designate (subject to the limitations set forth in paragraph (g) above) and the printing of memoranda relating thereto, (v) any fees charged by investment rating agencies for the rating of the Securities, and (vi) expenses incurred in distributing the Time of Sale Information and the Prospectus (including any amendments and supplements thereto) to the Representatives. Unless this Agreement is terminated pursuant to Section 10, the Company will reimburse the Underwriters for all travel expenses of the Underwriters and the Company’s officers and employees and any other expenses of the Underwriters and the Company in connection with attending or hosting meetings with prospective purchasers of the Securities.

17

(k) In connection with the offering, until and including the Business Day following the Closing Date, neither the Issuers nor any of their affiliates have or will, either alone or with one or more other persons, bid for or purchase for any account in which they or any of their affiliates have a beneficial interest in any Securities or attempt to induce any person to purchase any Securities; and neither they nor any of their affiliates will make bids or purchases for the purpose of creating actual, or apparent, active trading in, or of raising the price of, the Securities.

(l) The Company will not offer, sell, contract to sell, or otherwise dispose of, directly or indirectly, or file with the Commission a registration statement under the Securities Act relating to, United States dollar-denominated debt securities issued or guaranteed by the Company and having a maturity of more than one year from the date of issue, other than under any credit facility of the Company, without the prior written consent of the Representatives, which shall not be unreasonably withheld or delayed, for a period beginning at the time of execution of this Agreement and ending on the Closing Date or the failure of the consummation of the purchase and sale of the Securities as contemplated by Section 3 hereof.

(m) The Company will file all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act during the Prospectus Delivery Period.

(n) The Company will retain copies of each Issuer Free Writing Prospectus it has used that is not filed with the Commission in accordance with, and to the extent provided in Rule 433 under the Securities Act.

5. Certain Agreements of the Underwriters . Each Underwriter represents and agrees that:

(a) It has not and will not use, authorize use of, refer to, or participate in the planning for use of, any “free writing prospectus”, as defined in Rule 405 under the Securities Act (which term includes use of any written information furnished to the Commission by the Company and not incorporated by reference into the Registration Statement and any press release issued by the Company) other than (i) a free writing prospectus that, solely as a result of use by such Underwriter, would not trigger an obligation to file such free writing prospectus with the

18

Commission pursuant to Rule 433, (ii) any Issuer Free Writing Prospectus listed on Schedule III to the Underwriting Agreement or prepared pursuant to Sections 2(a)(iii), 2(b)(iii) or Section 4(d) above (including any electronic road show), or (iii) any free writing prospectus prepared by such Underwriter and approved by the Company in advance in writing.

(b) Notwithstanding the foregoing the Underwriters may use a term sheet substantially in the form of Schedule VII to the Underwriting Agreement without the consent of the Company.

(c) It will abide by the offering restrictions as set forth on Schedule VIII hereto.

6. Conditions of the Obligations of the Underwriters . The several obligations of the Underwriters to purchase and pay for the Securities will be subject to the performance by the Issuers of their