42 U.S.C. § 16456

(1)

the United States;

(2)

a State or any political subdivision of a State;

(3)

any foreign governmental authority not operating in the United States;

(4)

any agency, authority, or instrumentality of any entity referred to in paragraph (1), (2), or (3); or

(5)

any officer, agent, or employee of any entity referred to in paragraph (1), (2), (3), or (4) acting as such in the course of his or her official duty.