Agency head
Agency head means, for the executive branch agencies, the head of an executive agency as defined in 5 U.S.C. 105; for the legislative branch, the Secretary of the Senate, the Clerk of the House of Representatives, or the head of any other legislative branch agency; for the judicial branch, the Director of the Administrative Office of the United States Courts; for the Postal Service, the Postmaster General; for any other independent establishment that is an entity of the Federal Government, the head of the establishment.