Exhibit 10.1

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Sabine Pass Pipeline, L.P.

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-001

DATE OF CHANGE ORDER: June 8, 2006

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

In light of constrained resource availability, Cheniere has approved use of WEI affiliate Willbros RPI, Inc. for construction of the Work, in lieu of a competitive bidding process to select the construction contractor. Consequently, in accordance with Attachment 1 of the Agreement, paragraph 2.1, “Contingency Pool”, the Contingency Pool shall be reduced by fifty percent (50%) with a corresponding reduction in the Guaranteed Maximum Price.

Adjustment to price under the Agreement:

Adjustment to dates:

The Preparation and Material Receipt Commencement Date will be (increased) (decreased) (unchanged) by 0 calendar days and as a result of this Change Order is now:                 January 1, 2007

The Construction Commencement Date will be (increased) (decreased) (unchanged) by 0 calendar days and as a result of this Change Order is now:                 April 1, 2007

The Scheduled Mechanical Completion Date will be (increased) (decreased) (unchanged) by 0 calendar days and as a result of this Change Order is now:                 September 30, 2007

Other impacts to liability or obligation of Contractor or Company under the Agreement: None

Upon execution of this Change Order by Cheniere and Contractor, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Contractor’s Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-002

DATE OF CHANGE ORDER: July 26, 2006

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

Above changes result from the finalization of the pipeline system P&IDs for design on 7/10/06.

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-003

DATE OF CHANGE ORDER: December 8, 2006

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-004

DATE OF CHANGE ORDER: March 22, 2007

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

Above changes result from the finalization of the pipeline system pipeline plans for design on 1/11/07.

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-005

DATE OF CHANGE ORDER: April 11, 2007

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

Due to the uncertainties of the sheet piling and related costs for this activity, this change will be performed on a time and material basis utilizing the contract rates, the total cost of which will be added to the Guaranteed Maximum Price. For estimating purposes, a provisional sum is used below.

This change order involves installation of a sheet piling bulkhead along the south side of the trench line (approximately 200 ft in length) where the pipeline crosses the pond, filling in the pond with imported soil (provided by Cheniere) from the bulkhead northward, and installing the pipeline using conventional marsh construction techniques. Specific design details for this installation remain to be developed.

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-006

DATE OF CHANGE ORDER: April 10, 2007

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

The total costs associated with this change will be taken from the “Contingency Pool” and as such the “Guaranteed Maximum Price” prior to this change order remains unchanged. The net decrease to the Contingency Pool is an estimated $2,264,565 for the first bullet item above and $700,000 for the second bullet item for an estimated total of $2,994,565 (provisional sum). These activities will handled on a time and material basis using contract rates and a WEI issued purchase order to WRPI.

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-007

DATE OF CHANGE ORDER: April 10, 2007

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

The total costs associated with this change will be transferred from the “Contingency Pool” to “Construction” and as such the “Guaranteed Maximum Price” prior to this change order remains unchanged. The new lump sum price for “Construction” will have a net increase of $2,135,670 and the Contingency Pool will have a net decrease by a like amount.

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.

CHANGE ORDER FORM

PROJECT NAME: 42-inch Sabine Pass Pipeline Project

COMPANY: Cheniere Sabine Pass Pipeline Company

CONTRACTOR: Willbros Engineers, Inc.

CHANGE ORDER NUMBER: CO-008

DATE OF CHANGE ORDER: April 11, 2007

DATE OF AGREEMENT: February 1, 2006

The Agreement between the Parties listed above is changed as follows: (attach additional documentation if necessary)

Adjustment to price under the Agreement:

Adjustment to dates:

Other impacts to liability or obligation of Willbros or Cheniere under the Agreement: None

Upon execution of this Change Order by Cheniere and Willbros, the above-referenced change shall become a valid and binding part of the original Agreement without exception or qualification, unless noted in this Change Order. Except as modified by this and any previously issued Change Orders, all other terms and conditions of the Agreement shall remain in full force and effect. This Change Order is executed by each of the Cheniere’s Authorized Representative and Willbros’ Authorized Representative.