(As amended Apr. 9, 1956, eff. July 8, 1956; Feb. 28, 1966, eff. July 1, 1966; Apr. 24, 1972, eff. Oct. 1, 1972; Pub. L. 98–473, title II, § 209(d), Oct. 12, 1984, 98 Stat. 1987; Mar. 9, 1987, eff. Aug. 1, 1987; Apr. 30, 1991, eff. Dec. 1, 1991; Apr. 22, 1993, eff. Dec. 1, 1993; Pub. L. 103–322, title XXXIII, § 330003(h), Sept. 13, 1994, 108 Stat. 2141; Apr. 29, 2002, eff. Dec. 1, 2002.)