Pub. L. 83-763, tit. III, sec. 303

Sec. 303. As used in this title, the term “department” means an executive department or independent agency in the executive branch of the Government, including a Government-owned or controlled corporation (but not including the Tennessee Valley Authority), and also includes (a) the Administrative Office of the United States Courts, (b) the Library of Congress, (c) the Botanic Garden, (d) the Government Printing Office, (e) the Office of the Architect of the Capitol, and (f) the municipal government of the District of Columbia.