31 U.S.C. § 1558: Availability of funds following resolution of a formal protest or other challenge

Notwithstanding section 1552 of this title or any other provision of law, funds available to an agency for obligation for a contract at the time a protest or other action referred to in subsection (b) is filed in connection with a solicitation for, proposed award of, or award of such contract shall remain available for obligation for 100 days after the date on which the final ruling is made on the protest or other action. A ruling is considered final on the date on which the time allowed for filing an appeal or request for reconsideration has expired, or the date on which a decision is rendered on such an appeal or request, whichever is later. any protest filed under subchapter V of chapter 35 of this title; or a solicitation for a contract; a proposed award of a contract; an award of a contract; or the eligibility of an offeror or potential offeror for a contract or of the contractor awarded the contract; and commencement of the action delays or prevents an executive agency from making an award of a contract or proceeding with a procurement.