Section, [Pub. L. 88–452, § 4], formerly title I, § 102, as added [Pub. L. 93–644, § 3], Jan. 4, 1975, [88 Stat. 2292], renumbered § 4 and amended [Pub. L. 94–341, § 2(a)(2)], July 6, 1976, [90 Stat. 803], defined terms applicable to subchapters I to IX of this chapter.