2 U.S. Code § 635
2 U.S. Code § 635 is about Permissible revisions of concurrent resolutions on the budget. It is under Subchapter I (Congressional Budget Process) of Chapter 17A (Congressional Budget and Fiscal Operations) of Title 2 (The Congress) of the Code.
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.