Section, act Mar. 8, 1946, ch. 82, § 12, 60 Stat. 49; Sept. 28, 1950, ch. 1093, §§ 1, 2, 64 Stat. 1078; Pub. L. 97–31, § 12(158), Aug. 6, 1981, 95 Stat. 168; Pub. L. 101–225, title III, § 307(12), Dec. 12, 1989, 103 Stat. 1925, related to reconversion of vessels for normal commercial operation.