Provisions similar to those in this section were contained in section 2529 of Title 50, War and National Defense, prior to repeal by Pub. L. 119–60, § 3111(b)(1).

2025—Pub. L. 119–60, § 3111(d)(2)(B), realigned margins.

Pub. L. 115–232, div. C, title XXXI, § 3111(a), Aug. 13, 2018, 132 Stat. 2289, provided that: “The Secretary of Energy, acting through the Administrator for Nuclear Security, may carry out the engineering development phase, and any subsequent phase, to modify or develop a low-yield nuclear warhead for submarine-launched ballistic missiles.”

Pub. L. 108–136, div. C, title XXXI, § 3116(c), Nov. 24, 2003, 117 Stat. 1746, as amended by Pub. L. 115–232, div. C, title XXXI, § 3111(b), Aug. 13, 2018, 132 Stat. 2289; Pub. L. 119–60, div. C, title XXXI, § 3111(c)(2)(I), Dec. 18, 2025, 139 Stat. 1461, provided that: “The Secretary of Energy may not commence the engineering development phase, or any subsequent phase, of a low-yield nuclear weapon unless the Secretary specifically requests funding for the development of that weapon pursuant to section 6120 of title 10, United States Code.”