31 U.S.C. § 1557

Authority for exemptions in appropriation laws

A provision of an appropriation law may exempt an appropriation from the provisions of this subchapter and fix the period for which the appropriation remains available for expenditure.

( Pub. L. 97–258 , Sept. 13, 1982 , 96 Stat. 937 ; Pub. L. 101–510, div. A, title XIV, § 1405(a)(1) , Nov. 5, 1990 , 104 Stat. 1679 .)