President may withhold certain funding in the affected accounts for up to 45 legislative session days. If a law approving the rescission is not enacted within the 45 days, any withheld funds must be made available for obligation.
A 2018 Government Accountability Office legal opinion holds that if the President proposes a rescission, he or she must make the affected funds available to be prudently obligated before the funds expire, even if the 45-day clock is still running. This means, for example, that the President cannot strategically time a rescission request for late in the fiscal year and withhold the funding until it expires, thus achieving a rescission without Congressional approval.
Do we believe congress is going to pass any rescission bill? I don't.
45 legislative days reaches to late March. Plenty of time to kick some asses.