FORM OF WAIVER AGREEMENT NO. 9 TO CREDIT AGREEMENT

Exhibit 10.25

FORM OF WAIVER AGREEMENT NO. 9

TO CREDIT AGREEMENT

This WAIVER AGREEMENT NO. 9 TO CREDIT AGREEMENT (this “Waiver”), dated as of January 23, 2006, is made among Sabine Pass LNG, L.P., a Delaware limited partnership (the “Borrower”), Société Générale, in its capacity as administrative agent for the Lenders (the “Agent”), HSBC Bank USA, National Association, in its capacity as collateral agent for the Lenders (the “Collateral Agent”) and the Lenders party to the Credit Agreement (as defined below).

WITNESSETH

WHEREAS, the Borrower, the Agent and the Collateral Agent are party to a Credit Agreement dated as of February 25, 2005 (as amended, modified and supplemented and in effect from time to time, the “Credit Agreement”), pursuant to which the lenders from time to time party thereto (the “Lenders”) have agreed to make loans to the Borrower in an aggregate principal amount of up to $822,000,000;

WHEREAS, the Borrower and Chevron U.S.A. Inc. (“Chevron U.S.A.”) have entered into a Terminal Use Agreement (as amended, modified and supplemented and in effect from time to time, the “Chevron TUA”) setting forth the terms of the purchase and provision of terminalling services between the Borrower and Chevron U.S.A.;

WHEREAS, ChevronTexaco Corporation (“ChevronTexaco”) has executed in favor of the Borrower a Guarantee dated December 15, 2004, setting forth the terms of the unconditional and irrevocable guaranty by ChevronTexaco of the payment obligations of the Chevron U.S.A. pursuant to the Chevron TUA;

WHEREAS, as a condition precedent to the Funding Date, the Borrower is required to provide to the Agent, a certificate of an Authorized Officer of ChevronTexaco and the Chevron U.S.A. (the “Certificates”) certifying that the Guarantee and the Chevron TUA, respectively, are in full force and effect;

WHEREAS, pursuant to a waiver request letter (the “Waiver Request Letter”) attached hereto as Exhibit A, the Borrower has requested a waiver of the requirements of Section 6.02(i)(i) and (ii) of the Credit Agreement to deliver the Certificates in order to meet the conditions precedent to the Funding Date.

NOW THEREFORE, in consideration of the mutual agreements herein contained and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound hereby, agree as follows:

Section 1. Definitions. Capitalized terms (including those used in the preamble and the recitals above) not otherwise defined herein shall have the meanings assigned

Waiver No. 9

to such terms in the Credit Agreement and the principles of interpretation set forth therein shall apply herein.

Section 2. Waiver. Subject to the satisfaction of the condition set forth in Section 3 hereof, the Agent, acting with the consent of each Lender, hereby waives compliance with the requirements of Section 6.02(i)(i) and (ii) of the Credit Agreement to deliver the Certificates as a condition precedent to the Funding Date.

Section 3. Condition Precedent. This Waiver shall become effective on the date on which the Agent has received counterparts of this Waiver duly executed and delivered by the Borrower.

Section 4. Miscellaneous.

(a) Limited Waiver.

(i) Except as expressly consented to hereby, all of the representations, warranties, terms, covenants, conditions and other provisions of the Credit Agreement and the other Financing Documents shall remain unchanged and unwaived and shall continue to be and shall remain in full force and effect in accordance with their respective terms.

(ii) The waiver set forth herein shall be limited precisely as provided for herein to the provisions expressly waived and shall not be deemed to be a waiver of any right, power or remedy of any Lender, the Agent or the Collateral Agent under, or a waiver of, consent to or modification of, any other term or provision of the Credit Agreement, any other Financing Document referred to therein or herein or of any transaction or further or future action on the part of the Borrower which would require the consent of the Lenders under the Credit Agreement or any of the other Financing Documents.

(iii) Except as provided in Section 2 hereof, nothing contained in this Waiver shall abrogate, prejudice, diminish or otherwise affect any powers, rights, remedies or obligations of any Person arising before the date of this Waiver.

(b) Financing Document. This Waiver shall be deemed to be a Financing Document referred to in the Credit Agreement and shall be construed, administered and applied in accordance with the terms and provisions thereof.

(c) Counterparts; Integration; Effectiveness. This Waiver may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument and any party hereto may execute this Waiver by signing any such counterpart.

(d) Costs and Expenses. The Borrower agrees to pay and reimburse the Agent for all its reasonable costs and out-of-pocket expenses (including, without limitation, the reasonable fees and expenses of counsel to the Agent and the Lenders) incurred in connection with the preparation and delivery of this Waiver and such other related documents.

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(e) Governing Law. THIS WAIVER AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

[Signature Pages Follow]

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