For the purpose of this subchapter—
(1) “United States”, when used in a geographical sense means the several States and the District of Columbia; and
“employee” means—
(A) an employee as defined by section 2105 of this title; and
(B) an individual first employed by the government of the District of Columbia before October 1, 1987;
(Pub. L. 89–554, Sept. 6, 1966, 80 Stat. 517; Pub. L. 91–375, § 6(c)(17), Aug. 12, 1970, 84 Stat. 776; Pub. L. 95–519, § 1, Oct. 25, 1978, 92 Stat. 1819; Pub. L. 96–70, title III, § 3302(e)(2), Sept. 27, 1979, 93 Stat. 498; Pub. L. 96–465, title II, §§ 2312(a), 2314(f)(1), Oct. 17, 1980, 94 Stat. 2166, 2168; Pub. L. 99–335, title II, § 207(c)(1), formerly § 207(c), June 6, 1986, 100 Stat. 595, renumbered § 207(c)(1), Pub. L. 99–556, title II, § 201(1), Oct. 27, 1986, 100 Stat. 3135; Pub. L. 102–54, § 13(b)(2), June 13, 1991, 105 Stat. 274.)