If the amount appropriated (or made available in the event of a sequestration order issued pursuant to the Balanced Budget and Emergency Deficit Control Act of 1985 (Public Law 99–177; [2 U.S.C. 900 et seq.])) for a fiscal year pursuant to any authorization of appropriations provided by an Act other than an appropriation Act is less than the authorization amount and a provision of that Act provides that a specified amount of the authorization amount shall be available only for a certain purpose, then the amount so specified shall be deemed to be reduced for that fiscal year to the amount which bears the same ratio to the specified amount as the amount appropriated (or made available in the event of sequestration) bears to the authorization amount.
22 U.S. Code § 2678 - Reduction in earmarks if appropriations are less than authorizations
The Balanced Budget and Emergency Deficit Control Act of 1985, referred to in text, is title II of Pub. L. 99–177, Dec. 12, 1985, 99 Stat. 1038, which enacted chapter 20 (§ 900 et seq.) and sections 654 to 656 of Title 2, The Congress, amended sections 602, 622, 631 to 642, and 651 to 653 of Title 2, sections 1104 to 1106, and 1109 of Title 31, Money and Finance, and section 911 of Title 42, The Public Health and Welfare, repealed section 661 of Title 2, enacted provisions set out as notes under section 900 of Title 2 and section 911 of Title 42, and amended provisions set out as a note under section 621 of Title 2. For complete classification of this Act to the Code, see Short Title note set out under section 900 of Title 2 and Tables.
A prior section 2678, acts Aug. 1, 1956, ch. 841, title I, § 11, 70 Stat. 892; Sept. 8, 1960, Pub. L. 86–723, § 50, 74 Stat. 847; renumbered title I, Aug. 24, 1982, Pub. L. 97–241, title II, § 202(a), 96 Stat. 282; Oct. 19, 1984, Pub. L. 98–533, title III, § 303(b), 98 Stat. 2711, related to use of Government-owned vehicles for security purposes for travel by the Deputy Secretary of State, prior to repeal by Pub. L. 99–550, § 2(d), Oct. 27, 1986, 100 Stat. 3070.