18 U.S.C. § 9

The Director, the Secretary of Defense, and the Commandant of the Coast Guard shall each transmit a detailed semi-annual report of expenditures made pursuant to this Act during the six-month period immediately preceding such report by the Secret Service, the Department of Defense, and the Coast Guard, respectively, to the Committees on Appropriations, Committees on the Judiciary, and Committees on Government Operations [now Committee on Oversight and Accountability of the House of Representatives and Committee on Homeland Security and Governmental Affairs of the Senate] of the House of Representatives and the Senate, respectively, on March 31 and September 30, of each year.