I Strengthening Congressional Control and Review To Prevent Impoundment 101. Strengthening congressional control (a) In general The Impoundment Control Act of 1974 ( 2 U.S.C. 681 et seq.) is amended by adding at the end the following: 1018. Prudent obligation of budget authority and specific requirements for expiring budget authority (a) Special message requirement With respect to budget authority proposed to be rescinded or that is set to be reserved or proposed to be deferred in a special message transmitted under section 1012 or 1013, such budget authority— (1) shall be made available for obligation in sufficient time to be prudently obligated as required under section 1012(b) or 1013