(As amended Apr. 22, 1974, eff. Dec. 1, 1975; Pub. L. 94–64, § 3(15)–(19), July 31, 1975, 89 Stat. 373, 374; Pub. L. 98–473, title II, § 209(b), Oct. 12, 1984, 98 Stat. 1986; Mar. 9, 1987, eff. Aug. 1, 1987; Apr. 29, 2002, eff. Dec. 1, 2002; Apr. 23, 2012, eff. Dec. 1, 2012.)