5 U.S.C. § 402: Establishment and purpose of Offices of Inspector General

Subject to paragraph (2), in each of the establishments listed in section 401(1) of this title , there is established an Office of Inspector General. an Office of Inspector General of the Department of the Treasury; and an Office of Treasury Inspector General for Tax Administration. to conduct and supervise audits and investigations relating to the programs and operations of the establishments listed in section 401(1) of this title ; to promote economy, efficiency, and effectiveness in the administration of those programs and operations; and to prevent and detect fraud and abuse in those programs and operations; and to provide a means for keeping the head of the establishments and Congress fully and currently informed about problems and deficiencies relating to the administration of those programs and operations and the necessity for and progress of corrective action.