A prior section 9902, Pub. L. 97–35, title VI, § 673, Aug. 13, 1981, 95 Stat. 511; Pub. L. 97–115, § 17(a)(1), Dec. 29, 1981, 95 Stat. 1609; Pub. L. 98–288, § 31(a), May 21, 1984, 98 Stat. 197; Pub. L. 98–558, title II, § 202, Oct. 30, 1984, 98 Stat. 2884; Pub. L. 99–425, title IV, § 402, Sept. 30, 1986, 100 Stat. 968; Pub. L. 101–501, title IV, §§ 402, 408, Nov. 3, 1990, 104 Stat. 1251, 1255; Pub. L. 103–171, § 7(c)(1), Dec. 2, 1993, 107 Stat. 1994, defined terms used in this chapter, prior to the general amendment of this chapter by Pub. L. 105–285.