Exhibit 4.3

Standby Letter of Credit Agreement

(Credit Agreement/Loan Agreement Version)

THIS STANDBY LETTER OF CREDIT AGREEMENT (this “Agreement”) is by and between/among the undersigned (individually and collectively, “Applicant”; jointly and severally, if more than one) and Wells Fargo Bank, National Association and/or any of its branches or affiliates (individually and collectively, “Bank”).

PRELIMINARY STATEMENTS

A. Applicant is a party to the credit or loan agreement pursuant to which one or more letters of credit may be issued or will otherwise be governed (as may be amended, supplemented, restated or otherwise modified from time to time, the “Credit Agreement”).

B. Subject to the terms and conditions of the Credit Agreement, (a) Bank has agreed to issue standby letter(s) of credit as more particularly described therein, and/or (b) Bank and Applicant have agreed that certain existing standby letters(s) of credit will now be deemed for all purposes Credits (as defined below) issued under and in connection with this Agreement and not that certain Standby Letter of Credit Agreement between Bank and Borrower dated June 30, 2009, as may be amended from time to time (the “Existing Standby Letter of Credit Agreement” (in each case, as such standby letter(s) of credit may be amended from time to time, the “Credit(s)”) for the account of Applicant, subject to the additional terms and conditions of this Agreement, the Application (as defined below) and such other documents as may be required by Bank in connection with the issuance of the Credit(s). For purposes of this Agreement, if there is only one (1) Credit issued under the Credit Agreement, then all references herein to “a Credit”, “each Credit”, “one or more Credits”, “the Credits” or similar references shall be deemed to refer to the Credit only.

NOW, THEREFORE, in consideration of the premises and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Applicant and Bank (by its acceptance of this Agreement and the issuance of a Credit) hereby agree as follows (unless otherwise defined or indicated in this Agreement, capitalized terms used but not defined herein shall have the meanings given to such terms in the Credit Agreement):

1. Applications/Instructions. The request to issue or amend a Credit (including any Application for Standby Letter of Credit on which Applicant applied for a letter of credit under the Existing Standby Letter of Credit Agreement, an “Application”) shall be irrevocable and in such form as Bank shall from time to time require or agree to accept (including any type of electronic form or means of communication). Inquiries, communications and instructions (whether written, facsimile or in other electronic form approved by Bank) regarding a Credit, each Application and this Agreement are each referred to herein as “Instructions”. Bank’s records of the content of any Instruction will be conclusive. Applicant expressly agrees that the terms and conditions in this Agreement shall apply to each Application (including any Application for Standby Letter of Credit on which Applicant applied for a letter of credit under the Existing Standby Letter of Credit Agreement) and the Credit issued pursuant to each Application, and to transactions under each Application, each Credit and this Agreement.

2. Applicant’s Reimbursement and Payment Obligations and Terms.

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provided, however, that subject to Section 4(b) below, the foregoing shall not release Bank from such liability to Applicant as may be finally determined in a binding arbitration proceeding brought by Applicant pursuant to the Credit Agreement (or as may

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be judicially determined in a final, non-appealable judgment by a court of competent jurisdiction to the extent that a judicial determination, proceeding or remedy is permitted by the Credit Agreement) against Bank following reimbursement and/or payment of the Obligations. “Obligations” means all obligations and liabilities, including without limitation, reimbursement and other payment obligations and liabilities, of Applicant to Bank arising under, or in connection with, this Agreement, including, without limitation, Section 4 below, any Application or any Credit, whether matured or unmatured, absolute or contingent, now existing or hereafter incurred. “Person” means any natural person, corporation, limited liability company, trust, joint venture, association, company, partnership, governmental authority or other entity.

3. Applicant’s Responsibility. Applicant is responsible for preparing and/or approving the final text of the Credit as issued by Bank, irrespective of any assistance Bank may provide such as drafting or recommending text or by Bank’s use or refusal to use text submitted by Applicant. Applicant understands that the final form of any Credit may be subject to such revisions and changes as are deemed necessary or appropriate by Bank and Applicant hereby consents to such revisions and changes. Applicant is solely responsible for the suitability of the Credit for Applicant’s purposes. Applicant will examine the copy of the Credit and any other documents sent by Bank in connection with the Credit and shall promptly notify Bank of any non-compliance with Applicant’s Instructions and of any discrepancy in any document under any presentment or other irregularity. Applicant understands and agrees that Bank is not required to extend the expiration date of any Credit for any reason, and with respect to any Credit containing an “automatic amendment” to extend the expiration date of such Credit, Bank, in its sole and absolute discretion, may give notice of nonrenewal of such Credit and, if Applicant does not at any time want such Credit to be renewed, Applicant will so notify Bank at least fifteen (15) calendar days before Bank is required to notify the beneficiary of such Credit or any advising bank of such nonrenewal pursuant to the terms of such Credit.

4. Indemnification; Limitation of Liability.

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in each case, including that resulting from Bank’s own negligence; provided, however, that such indemnity shall not be available to any Person claiming indemnification under clauses (i) through (xi) above to the extent that such Costs are found in a binding arbitration proceeding brought by Applicant pursuant to the Credit Agreement (or as may be judicially determined in a final, non-appealable judgment by a court of competent jurisdiction to the extent the Credit Agreement permits (or applicable law requires) any dispute to be brought in state or federal court located in the Jurisdiction) to have resulted directly from the gross negligence or willful misconduct of the Indemnified Person claiming indemnity. Applicant hereby agrees to pay Bank on demand from time to time all amounts owing under this Section. If and to the extent that the Obligations of Applicant under this Section are unenforceable for any reason, Applicant agrees to make the maximum contribution to the Costs permissible under applicable law. This indemnity provision shall survive termination of this Agreement and all Credits.

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5. Representations and Warranties. Applicant hereby makes all of the representations and warranties given to Bank in the Credit Agreement as if set forth in full herein, together with the representations and warranties set forth below, and Applicant further represents and warrants to Bank that all such representations and warranties are true and correct in all respects (all of which representations and warranties will be repeated as true and correct as of the date of each new Application submitted by Applicant to Bank and as of the date of issuance of any Credit requested in each such Application):

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6. Covenants. Applicant hereby repeats each of its affirmative and negative covenants in the Credit Agreement as if set forth in full herein, and Applicant further covenants and agrees, at its costs and expense, to execute and deliver to Bank such additional certificates, instruments and/or documents and to take such additional action as may be reasonably requested by Bank to enable Bank to issue any Credit pursuant to this Agreement and related Application, to protect, exercise and/or enforce Bank’s rights and interests under this Agreement and/or to give effect to the terms and provisions of this Agreement or any Application. Applicant irrevocably appoints Bank as its attorney-in-fact and authorizes Bank, without notice to Applicant, to execute and deliver all such documents and to take all such actions on behalf of Applicant. This appointment is coupled with an interest.

7. Events of Default. Each of the following shall be an “Event of Default” under this Agreement:

8. Remedies. Upon the occurrence and during the continuance of any Event of Default:

With respect to Bank’s exercise of any of the foregoing rights, powers and/or remedies, Applicant hereby waives presentment, protest, dishonor, notice of dishonor, demand, notice of protest, notice of non-payment, notice of acceptance of this Agreement and any other notice or demand of any kind from Bank.

9. Subrogation. The Bank, at its option, shall be subrogated to Applicant’s rights against any Person who may be liable to Applicant on any transaction or obligation underlying any Credit, to the rights of any holder in due course or Person with similar status against Applicant, and to the rights of any beneficiary or any successor or assignee of any beneficiary.

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10. Governing Law; UCP; ISP; Standard Letter of Credit Practice. This Agreement and each Credit shall be governed by and construed in accordance with (a)(1) in the case of each Credit, the substantive laws of the jurisdiction specified in the applicable Credit, or if no governing law is so specified, the substantive laws of the jurisdiction of the office of Bank that issued the applicable Credit, and (2) in the case of this Agreement, the governing law specified in the Credit Agreement, or if no governing law is so specified, the substantive laws of the jurisdiction of the office of Bank that issued the applicable Credit (as applicable, the “Jurisdiction”), in either case, including the Uniform Commercial Code as in effect from time to time in such Jurisdiction (the “UCC”), but excluding any choice of law rules that would apply the law of a different jurisdiction, and (b) the ISP or UCP, as set forth in each Credit, which is, as applicable, incorporated herein by reference into this Agreement and which shall control (to the extent not prohibited by the law of the Jurisdiction) in the event of any inconsistent provisions of such law. Unless Applicant specifies otherwise in its Application for a Credit, Applicant agrees that Bank may issue a Credit subject to the ISP or UCP. Bank’s privileges, rights and remedies under the ISP, UCP shall be in addition to, and not in limitation of, its privileges, rights, and remedies expressly provided for herein. The ISP and UCP shall serve, in the absence of proof to the contrary, as evidence of Standard Letter of Credit Practice with respect to matters covered therein. To the extent permitted by applicable law, (i) this Agreement shall prevail in case of conflict between this Agreement, the UCC and/or Standard Letter of Credit Practice, (ii) the ISP shall prevail in case of conflict between the ISP and the UCC or other Standard Letter of Credit Practice if the Credit is governed by the ISP, and (iii) the UCP shall prevail in case of a conflict between the UCP and the UCC or other Standard Letter of Credit Practice if the Credit is governed by the UCP.

11. Arbitration. Applicant and Bank hereby agree to and incorporate by reference the arbitration provisions of the Credit Agreement as if set forth in full herein.

12. Consent to Jurisdiction and Venue. Without waiving or modifying any of the mandatory arbitration provisions set forth in the Credit Agreement and to the extent such arbitration requirements permit (or applicable law requires) any dispute to be brought in state or federal court located in the Jurisdiction, in any proceeding involving, directly or indirectly, any matter arising out of or related to this Agreement or any Credit issued in connection with this Agreement and Applicant’s Application with respect to such Credit, Applicant hereby irrevocably submits to the nonexclusive jurisdiction of any state or federal court located in any county in the Jurisdiction and agrees not to raise any objection to the Jurisdiction or to the laying or maintaining of the venue of any such proceeding in the Jurisdiction. Applicant agrees that service of process in any such proceeding may be duly effected upon it by mailing a copy thereof, by certified mail, postage prepaid, to it at its address set forth in Section 15 below.

13. WAIVER OF JURY TRIAL. WITHOUT WAIVING OR MODIFYING ANY OF THE MANDATORY ARBITRATION REQUIREMENTS AND PROVISIONS SET FORTH IN THE CREDIT AGREEMENT, TO THE EXTENT SUCH ARBITRATION REQUIREMENTS PERMIT (OR APPLICABLE LAW REQUIRES) ANY DISPUTE TO BE BROUGHT IN STATE OR FEDERAL COURT LOCATED IN THE JURISDICTION, APPLICANT AND WHEN IT ISSUES A CREDIT, BANK KNOWINGLY AND VOLUNTARILY WAIVE ALL RIGHTS TO TRIAL BY JURY WITH RESPECT TO ANY LITIGATION BASED ON, ARISING OUT OF, OR RELATING TO THE AGREEMENT OR THE CREDIT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (ORAL OR WRITTEN) OR ACTIONS OF APPLICANT OR BANK WITH RESPECT THERETO. THIS WAIVER IS A MATERIAL INDUCEMENT FOR BANK TO ISSUE THE CREDIT.

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14. Bankruptcy and Forfeiture Reinstatement. If any consideration transferred to Bank in payment of, or as collateral for, or in satisfaction of the Obligations, shall be voided in whole or in part as a result of (a) a subsequent bankruptcy or insolvency proceeding; (b) any forfeiture or seizure action or remedy; (c) any fraudulent transfer or preference action or remedy; or (d) any other civil, criminal or equitable proceeding or remedy, then Bank’s claim to recover the voided consideration shall be a new and independent claim arising under this Agreement and shall be jointly and severally due and payable immediately by Applicant.

15. Notices. Unless otherwise expressly provided herein, all notices, Instructions, approvals, requests, demands, consents and other communications provided for hereunder (collectively, “notices”) shall be in writing (including by facsimile or other electronic transmission approved by Bank). All notices shall be sent by regular U.S. mail or certified mail prepaid, by facsimile or other electronic transmission approved by Bank, by hand delivery, by Federal Express (or other comparable domestic or international delivery service) prepaid to the applicable address, facsimile number or electronic mail address set forth on the signature page hereof in the case of Applicant. All notices to Bank shall be directed to the office of Bank issuing the Credit and, if Bank approves of receiving notices by email, to the email address of Bank provided from time to time by Bank to Applicant. Bank may, but shall not be obligated to, require authentication of any electronic transmission. Notices sent by hand, Federal Express (or other comparable domestic or international delivery service) or certified mail shall be deemed to have been given when received; notices sent by regular U.S. mail shall be deemed to have been received five (5) days after deposit into the U.S. mail, notices sent by facsimile or other electronic transmission shall be deemed to have been given when sent and receipt has been confirmed. Applicant or Bank may change its address for notices by notifying the other of the new address in any manner permitted by this Section.

16. Waiver and Amendments. No modification, amendment or waiver of, or consent to any departure by Applicant from, any provision of this Agreement will be effective unless made in a writing signed by Bank, and then such waiver or consent shall be effective only in the specific instance and for the purpose for which given. Bank’s consent to any amendment, waiver or modification does not mean that Bank will consent or has consented to any other or subsequent Instruction to amend, modify or waive a term of this Agreement or any Credit. No delay by Bank in exercising any of its rights or remedies shall operate as a waiver, nor shall any single or partial waiver of any right or remedy preclude any other further exercise of that right or remedy, or the exercise of any other right or remedy.

17. Successors and Assigns. This Agreement will be binding on Applicant’s heirs, executors, administrators, legal representatives, successors and permitted assigns, and shall inure to the benefit of Bank’s successors and assigns. Bank may assign this Agreement and its rights to reimbursement regarding any Credit, in whole or in part, without Applicant’s consent. Applicant may not assign or transfer any of its interests, rights or remedies related to this Agreement or any Credit, in whole or in part, without the prior written consent of Bank.

18. Severability. Whenever possible, each provision of the Agreement shall be interpreted in a manner as to be effective and valid under applicable law, but if any provision of the Agreement shall be prohibited by or invalid under applicable law, such provision shall be ineffective only to the extent of such prohibition or invalidity without invalidating the remainder of such provision or any remaining provisions of this Agreement.

19. Entire Agreement; Amendment and Restatement. This Agreement, together with any Application(s) accepted by Bank and any other agreement, document or instrument referred to herein, constitute the final, exclusive and entire agreement and understanding of, and supersede all prior or contemporaneous, oral or written, agreements, understandings, representations and negotiations between, the parties relating to the subject matter of this Agreement, provided that this Agreement shall not

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supersede any reimbursement agreement (however titled) that has been entered into specifically with respect to any “direct pay” standby letter of credit or other similar standby letter of credit where the terms of such reimbursement agreement have been drafted to specifically address the particular attributes of, or the particular circumstances of the underlying transaction supported by, such standby letter of credit. Without limiting the generality of the foregoing, Applicant hereby agrees, for good and valuable consideration, that the Existing Standby Letter of Credit Agreement, regardless of whether it was addressed to Bank or some other person or entity, be replaced in its entirety by this Agreement so that the Credits which were originally issued under and in connection with the Existing Standby Letter of Credit Agreement will now be deemed for all purposes Credits issued under and in connection with this Agreement and not the existing Standby Letter of Credit Agreement.

20. Conflicts. In the event of any conflict or inconsistency between the provisions of this Agreement and the provisions of the Credit Agreement, (a) the provisions of this Agreement shall control as to (i) the definition of “Business Day” in Section 2 hereof, (ii) compliance with laws in Section 5(b) hereof and (iii) notices in Section 15 hereof as it applies to this Agreement, and (b) the provisions of the Credit Agreement shall control all other conflicts or inconsistencies.

21. Continuing Agreement. This Agreement is a continuing agreement and may not be terminated by Applicant except upon (a) thirty (30) days’ prior written notice of such termination by Applicant to Bank at the address set forth on the most recent Credit issued hereunder, (b) reimbursement and/or payment of all Obligations, and (c) the expiration or cancellation of all Credits issued hereunder. Notwithstanding the foregoing sentence, if a Credit is issued in favor of a sovereign or commercial entity, which is to issue a guarantee or undertaking on Applicant’s behalf in connection therewith, or is issued as support for such a guarantee, Applicant shall remain liable with respect to such Credit until Bank is fully released in writing by such entity.

22. Joint and Several Liability. If this Agreement is signed by two or more Applicants:

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Until all Obligations shall have been paid in full, no Applicant shall have any right of subrogation. Each Applicant hereby waives all rights and defenses it may have arising out of (A) any election of remedies by Bank, even though that election of remedies, such as a non-judicial foreclosure with respect to any security for the Obligations, destroys its rights of subrogation or its rights to proceed against the other Applicant(s) for reimbursement, or (B) any loss of rights it may suffer by reason of any rights, powers or remedies of the other Applicant(s) in connection with any anti-deficiency laws or any other laws limiting, qualifying or discharging any Applicant’s indebtedness for the Obligations. Until all Obligations shall have been paid in full, each Applicant hereby waives any right to enforce any remedy which Bank now has or may hereafter have against the other Applicant(s) or any other Person, and waives any benefit of, or any right to participate in, any security now or hereafter held by Bank. Unless otherwise agreed by Bank, Bank in its discretion may accept an Application or seek or receive Instruction from, or give or send notice to, any Applicant regarding a Credit, including, without limitation, any amendment thereto or waiver of any discrepancy thereunder, and until Bank at the office at which the relevant Credit is issued actually receives written notice of revocation, each Applicant shall be bound by and hereby affirms the Instructions of the other.

[End of text; signature page to follow]

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APPLICANT:

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