For the purpose of this subchapter—

(1) “agency” means—

(A) an Executive agency;

(B) the Library of Congress;

(C) the Office of the Architect of the Capitol;

(D) the Botanic Garden;

(E) the Government Publishing Office;

(F) the government of the District of Columbia; and

(G) the United States Sentencing Commission;

but does not include—

(i) the Tennessee Valley Authority; or

(ii) the Central Bank for Cooperatives;

(2) “employee” means—

(A) an employee as defined by section 2105; and

(B) an individual employed by the government of the District of Columbia; and

(3) “Government” means the Government of the United States and the government of the District of Columbia.