Pub. L. 110–234 and Pub. L. 110–246 enacted identical sections. Pub. L. 110–234 was repealed by section 4(a) of Pub. L. 110–246.

2025—Subsec. (a)(5). Pub. L. 118–272, § 2249(a), added par. (5).

Subsec. (a)(6). Pub. L. 118–272, § 2250(a), added par. (6).

Subsec. (b)(2)(C). Pub. L. 118–272, § 2242(a)(1), designated existing provisions as cl. (i), inserted heading, and added cl. (ii).

Subsec. (f). Pub. L. 118–272, § 2242(a)(2), substituted “an employee” for “a Federal employee”.

2022—Subsec. (a)(4). Pub. L. 117–328 added par. (4).

2018—Subsec. (f). Pub. L. 115–334 added subsec. (f).

Section effective on the first day of the first fiscal year beginning after June 18, 2008, see section 14217(d) of Pub. L. 110–246, set out as a note under section 15101 of this title.

Pub. L. 119–74, div. B, title IV, Jan. 23, 2026, 140 Stat. 90, provided that: “For expenses necessary to establish a Northwest Regional Commission located in Washington, Oregon, Idaho, and Montana, $1,000,000, to remain available until expended: Provided, That amounts provided to the Northwest Regional Commission shall be used to carry out activities authorized for other regional Commissions by subtitle V of title 40, United States Code.”