# § 17142. Procurement and acquisition of alternative fuels
No Federal agency shall enter into a contract for procurement of an alternative or synthetic fuel, including a fuel produced from nonconventional petroleum sources, for any mobility-related use, other than for research or testing, unless the contract specifies that the lifecycle greenhouse gas emissions associated with the production and combustion of the fuel supplied under the contract must, on an ongoing basis, be less than or equal to such emissions from the equivalent conventional fuel produced from conventional petroleum sources.
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**Source Credit**: (Pub. L. 110–140, title V, § 526, Dec. 19, 2007, 121 Stat. 1663.)
## Statutory Notes and Related Subsidiaries
### Effective Date
Section effective on the date that is 1 day after , see , set out as a note under , The Congress.
### Waiver Authority for Alternative Fuel Procurement Requirement
> **“(a)** **In General.—** The Secretary of Defense may waive the requirement under section 526 of the Energy Independence and Security Act of 2007 (Public Law 110–140; 42 U.S.C. 17142) if the Secretary determines it is in the national security interest of the United States.
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> **“(b)** **Notification Requirement.—** The Secretary of Defense shall notify the congressional defense committees [Committees on Armed Services and Appropriations of the Senate and the House of Representatives] not later than 15 days after exercising the waiver authority under subsection (a).”
, , , provided that: