§ 1557.
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].)