Title 50War and National DefenseRelease 119-73not60

§2529 Requirements for Specific Request for New or Modified Nuclear Weapons

Title 50 › Chapter 42— ATOMIC ENERGY DEFENSE PROVISIONS › Subchapter II— NUCLEAR WEAPONS STOCKPILE MATTERS › Part A— Stockpile Stewardship and Weapons Production › § 2529

Last updated Apr 5, 2026|Official source

Summary

When the Secretary of Energy plans to do work past phase 2 or phase 6.2 of the nuclear weapon acquisition process for a new or modified nuclear weapon in any fiscal year after fiscal year 2002, the Secretary must ask for specific money for those activities in the President’s budget under section 1105 of title 31. The Secretary must include a separate budget line for each kind of activity (research, engineering, or manufacturing) for any weapon that is in phase 2 or higher or phase 6.2 or higher. The work can only happen if Congress approves the money in a law consistent with section 7270 of title 42. For any fiscal year after fiscal year 2022, when the President’s budget is sent to Congress, the Secretary (through the Administrator) must tell the congressional defense committees about any such research, engineering, or manufacturing that was done before phase 2 or phase 6.2 in the previous calendar year, and about any plans to do that kind of work before those phases in the coming fiscal year. Definitions: "Modified nuclear weapon" — a weapon that uses a pit or canned subassembly that was in the stockpile on December 2, 2002, but is being changed for a new military need. "New nuclear weapon" — a weapon that uses a pit or canned subassembly that was not in the stockpile on December 2, 2002 and was not in production on that date.

Full Legal Text

Title 50, §2529

War and National Defense — Source: USLM XML via OLRC

(a)(1)In any fiscal year after fiscal year 2002 in which the Secretary of Energy plans to carry out activities described in paragraph (2) relating to the development of a new nuclear weapon or modified nuclear weapon beyond phase 2 or phase 6.2 (as the case may be) of the nuclear weapon acquisition process, the Secretary—
(A)shall specifically request funds for such activities in the budget of the President for that fiscal year under section 1105(a) of title 31; and
(B)may carry out such activities only if amounts are authorized to be appropriated for such activities by an Act of Congress consistent with section 7270 of title 42.
(2)The activities described in this paragraph are as follows:
(A)The conduct, or provision for conduct, of research and development for the production of a new nuclear weapon by the United States.
(B)The conduct, or provision for conduct, of engineering or manufacturing to carry out the production of a new nuclear weapon by the United States.
(C)The conduct, or provision for conduct, of research and development for the production of a modified nuclear weapon by the United States.
(D)The conduct, or provision for conduct, of engineering or manufacturing to carry out the production of a modified nuclear weapon by the United States.
(b)In a request for funds under subsection (a), the Secretary shall include a dedicated line item for each activity described in subsection (a)(2) for a new nuclear weapon or modified nuclear weapon that is in phase 2 or higher or phase 6.2 or higher (as the case may be) of the nuclear weapon acquisition process.
(c)In any fiscal year after fiscal year 2022, the Secretary of Energy, acting through the Administrator, in conjunction with the annual submission of the budget of the President to Congress pursuant to section 1105 of title 31, shall notify the congressional defense committees of—
(1)any activities described in subsection (a)(2) relating to the development of a new nuclear weapon or modified nuclear weapon that, during the calendar year prior to the budget submission, were carried out prior to phase 2 or phase 6.2 (as the case may be) of the nuclear weapon acquisition process; and
(2)any plans to carry out, prior to phase 2 or phase 6.2 (as the case may be) of the nuclear weapon acquisition process, activities described in subsection (a)(2) relating to the development of a new nuclear weapon or modified nuclear weapon during the fiscal year covered by that budget.
(d)In this section:
(1)The term “modified nuclear weapon” means a nuclear weapon that contains a pit or canned subassembly, either of which—
(A)is in the nuclear weapons stockpile as of December 2, 2002; and
(B)is being modified in order to meet a military requirement that is other than the military requirements applicable to such nuclear weapon when first placed in the nuclear weapons stockpile.
(2)The term “new nuclear weapon” means a nuclear weapon that contains a pit or canned subassembly, either of which is neither—
(A)in the nuclear weapons stockpile on December 2, 2002; nor
(B)in production as of that date.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Codification Section was formerly classified to section 7271d of Title 42, The Public Health and Welfare, prior to renumbering by Pub. L. 108–136.

Amendments

2024—Subsec. (a)(1). Pub. L. 118–159 substituted “phase 2 or phase 6.2” for “phase 1 or phase 6.1” in introductory provisions. 2022—Subsec. (a)(1). Pub. L. 117–263, § 3111(1)(A), inserted “beyond phase 1 or phase 6.1 (as the case may be) of the nuclear weapon acquisition process” after “modified nuclear weapon” in introductory provisions. Subsec. (a)(2)(A), (C). Pub. L. 117–263, § 3111(1)(B), substituted “research and development for the production” for “research and development which could lead to the production”. Subsec. (b). Pub. L. 117–263, § 3111(2), added subsec. (b) and struck out former subsec. (b) which related to budget request format. Subsec. (c). Pub. L. 117–263, § 3111(3), added subsec. (c) and struck out former subsec. (c). Prior to amendment, text read as follows: “Subsection (a) shall not apply to funds for purposes of conducting, or providing for the conduct of, research and development, or manufacturing and engineering, determined by the Secretary to be necessary to address proliferation concerns.” 2018—Subsec. (a)(1). Pub. L. 115–232 inserted dash after “weapon, the Secretary”, designated remainder of existing provisions as subpar. (A), and added subpar. (B). 2013—Subsec. (d). Pub. L. 113–66 made technical amendment to reference in original act which appears in text as reference to “
December 2, 2002” in two places. 2009—Subsec. (c). Pub. L. 111–84, § 3115(1), substituted “necessary to address proliferation concerns.” for “necessary— “(1) for the nuclear weapons life extension program; “(2) to modify an existing nuclear weapon solely to address safety or reliability concerns; or “(3) to address proliferation concerns.” Subsec. (d). Pub. L. 111–84, § 3115(2), redesignated pars. (2) and (3) as (1) and (2), respectively, and struck out former par. (1), which read as follows: “The term ‘life extension program’ means the program to repair or replace non-nuclear components, or to modify the pit or canned subassembly, of nuclear weapons that are in the nuclear weapons stockpile on
December 2, 2002, in order to assure that such nuclear weapons retain the ability to meet the military requirements applicable to such nuclear weapons when first placed in the nuclear weapons stockpile.”

Statutory Notes and Related Subsidiaries

Development of Low-Yield Nuclear Weapons; Authorization and Limitation 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, 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 4209(a) of the Atomic Energy Defense Act (50 U.S.C. 2529(a)).”

Reference

Citations & Metadata

Citation

50 U.S.C. § 2529

Title 50War and National Defense

Last Updated

Apr 5, 2026

Release point: 119-73not60