2021—Subsec. (a). Pub. L. 117–81, § 1633(1), added subsec. (a) and struck out former subsec. (a). Prior to amendment, text read as follows: “Other than pursuant to a treaty, if the President has under consideration to unilaterally change the size of the total stockpile of nuclear weapons of the United States by more than 25 percent, prior to doing so the President shall initiate a Nuclear Posture Review.”

Subsec. (c). Pub. L. 117–81, § 1633(2), substituted “described in subsection (a)” for “in the nuclear weapons stockpile by more than 25 percent”.

Subsec. (d). Pub. L. 117–81, § 1633(3), substituted “obligations pursuant to a treaty to which the Senate has provided advice and consent pursuant to section 2 of article II of the Constitution” for “treaty obligations”.

Subsec. (f). Pub. L. 117–81, § 1633(4), added subsec. (f).

2013—Pub. L. 113–66 inserted a period after the enumerator in section catchline.