§6129 — Title 10 Armed Forces | U.S. Code

§6129 Certification of Completion of Milestones with Respect to Plutonium Pit Aging

Title 10 › Subtitle Subtitle A— General Military Law › Part VI— ELEMENTS OF DEPARTMENT OF DEFENSE AND OTHER MATTERS › Subpart B— Atomic Energy Defense › Chapter 602— NUCLEAR WEAPONS STOCKPILE MATTERS › Subchapter I— STOCKPILE STEWARDSHIP AND WEAPONS PRODUCTION › § 6129

Last updated Apr 18, 2026|Official source

Summary

The Administrator must finish the plutonium pit aging milestones listed in the report titled "Research Program Plan for Plutonium and Pit Aging," published in September 2021. The Administrator must hold reviews every two years through the Defense Programs Advisory Committee, starting within one year after this law was passed and running through December 31, 2030. The Administrator must also try to arrange for the JASON scientific group to do an assessment of plutonium pit aging by 2030. From one year after enactment until December 31, 2030, the Administrator must brief the congressional defense committees every two years about progress and the assessment results. By October 1, 2031, the Administrator must tell those committees whether the milestones were met. If they were not met, the Administrator must explain why, say if any milestone cannot be met, and give new dates for finishing the remaining milestones.

Title 10, §6129

Armed Forces — Source: USLM XML via OLRC

(a)The Administrator shall complete the milestones on plutonium pit aging identified in the report entitled “Research Program Plan for Plutonium and Pit Aging”, published by the Administration in September 2021.

(b)The Administrator shall—

(1)acting through the Defense Programs Advisory Committee, conduct biennial reviews during the period beginning not later than one year after the date of the enactment of this Act and ending December 31, 2030, regarding the progress achieved toward completing the milestones described in subsection (a); and

(2)seek to enter into an arrangement with the private scientific advisory group known as JASON to conduct, not later than 2030, an assessment of plutonium pit aging.

(c)During the period beginning not later than one year after the date of the enactment of this Act and ending December 31, 2030, the Administrator shall provide to the congressional defense committees biennial briefings on—

(1)the progress achieved toward completing the milestones described in subsection (a); and

(2)the results of the assessments described in subsection (b).

(d)Not later than October 1, 2031, the Administrator shall—

(1)certify to the congressional defense committees whether the milestones described in subsection (a) have been achieved; and

(2)if the milestones have not been achieved, submit to such committees a report—

(A)describing the reasons such milestones have not been achieved;

(B)including, if the Administrator determines the Administration will not be able to meet one of such milestones, an explanation for that determination; and

(C)specifying new dates for the completion of the milestones the Administrator anticipates the Administration will meet.

Notes & Related Subsidiaries

Editorial Notes

References in Text

The date of the enactment of this Act, referred to in subsecs. (b)(1) and (c), is the date of enactment of Pub. L. 119–60, which was approved Dec. 18, 2025.

Prior Provisions

Provisions similar to those in this section were contained in section 3124 of Pub. L. 117–263, which was set out as a note under section 2538a of Title 50, War and National Defense, prior to repeal by Pub. L. 119–60, § 3111(b)(11).