2 U.S.C. § 635
Permissible revisions of concurrent resolutions on the budget
At any time after the concurrent resolution on the budget for a fiscal year has been agreed to pursuant to section 632 of this title , and before the end of such fiscal year, the two Houses may adopt a concurrent resolution on the budget which revises or reaffirms the concurrent resolution on the budget for such fiscal year most recently agreed to.
( Pub. L. 93–344, title III, § 304 , July 12, 1974 , 88 Stat. 310 ; Pub. L. 99–177, title II, § 201(b) , Dec. 12, 1985 , 99 Stat. 1047 ; Pub. L. 100–119, title II, § 208(b) , Sept. 29, 1987 , 101 Stat. 786 ; Pub. L. 101–508, title XIII, § 13112(a)(8) , Nov. 5, 1990 , 104 Stat. 1388–608 ; Pub. L. 105–33, title X, § 10108 , Aug. 5, 1997 , 111 Stat. 684 .)