The Impoundment Control Act (Title X of the Congressional Budget and Impoundment Control Act, codified at 2 U.S.C. §681-688) exists because President Richard Nixon refused to spend billions in congressionally appropriated funds for environmental protection, urban programs, and other Democratic priorities. Nixon called it "impoundment"—the president's power to decline spending money Congress had authorized and appropriated. The act shut down this executive power grab by requiring formal procedures.
Under the act, if the president wants to avoid spending appropriated funds, he must submit a rescission request to Congress. Rescissions require approval by both the House and Senate within 45 days; if Congress doesn't approve, the funds must be spent. The president can also request a deferral, delaying spending to a later fiscal year, but deferrals lapse if either chamber votes to disapprove. These procedures enforce the constitutional principle that "the Purse" belongs to Congress (Article I): Congress appropriates, and the executive branch executes. Presidents can't rewrite the budget by unilaterally withholding funds, regardless of policy disagreement.
The act has had mixed success: presidents still use creative strategies to affect spending (redirecting funds between accounts, impounding through appropriations riders, slow implementation). But the act's core principle—no presidential impoundment without congressional authorization—has held. Rescission requests rarely succeed; Congress usually resists, forcing presidents to spend as appropriated. This reinforces congressional power over the purse and limits executive unilateralism on fiscal policy.
The Impoundment Control Act preserves Congress's power of the purse against presidential override. Without it, presidents could unilaterally rewrite budgets by not spending, gutting programs Congress funded.
Some conflate impoundment with executive discretion in spending. The act doesn't prevent presidents from setting priorities within appropriated funds; it prevents outright refusal to spend appropriations Congress approved.
The Impoundment Control Act preserves Congress's power of the purse against presidential override. Without it, presidents could unilaterally rewrite budgets by not spending, gutting programs Congress funded.
Some conflate impoundment with executive discretion in spending. The act doesn't prevent presidents from setting priorities within appropriated funds; it prevents outright refusal to spend appropriations Congress approved.