For the purpose of this subchapter—
“agency” means—
(A) an Executive agency;
(B) a military department; and
(C) an employing authority in the legislative branch;
(2) “employee” means an employee in or under an agency;
(3) “international organization” means a public international organization or international-organization preparatory commission in which the Government of the United States participates;
(4) “transfer” means the change of position by an employee from an agency to an international organization; and
“reemployment” means—
(A) the reemployment of an employee under section 3582(b) of this title; or
(B) the reemployment of a Congressional employee within 90 days from his separation from an international organization;
(Pub. L. 89–554, Sept. 6, 1966, 80 Stat. 429; Pub. L. 91–175, pt. V, § 502(b), Dec. 30, 1969, 83 Stat. 825; Pub. L. 94–183, § 2(9), Dec. 31, 1975, 89 Stat. 1057.)