Section, added Pub. L. 95–600, title I, § 141(c)(1), Nov. 6, 1978, 92 Stat. 2794; amended Pub. L. 96–222, title I, § 101(a)(7)(L)(iii)(VI), (v)(IX), Apr. 1, 1980, 94 Stat. 200; Pub. L. 97–34, title III, § 331(c)(3), (4), Aug. 13, 1981, 95 Stat. 293, 294; Pub. L. 97–448, title I, § 103(g)(2)(B)–(D), Jan. 12, 1983, 96 Stat. 2379; Pub. L. 98–369, div. A, title IV, § 491(e)(9), July 18, 1984, 98 Stat. 853; Pub. L. 99–514, title XVIII, § 1847(b)(9), Oct. 22, 1986, 100 Stat. 2857, related to assessable penalties applicable to tax credit employee stock ownership plans.