Section, acts June 29, 1936, ch. 858, title VIII, § 804,
49 Stat. 2012; June 23, 1938, ch. 600, § 35,
52 Stat. 963;
Pub. L. 91–469, § 24, Oct. 21, 1970,
84 Stat. 1033;
Pub. L. 96–470, title II, § 201(b), Oct. 19, 1980,
94 Stat. 2241;
Pub. L. 97–31, § 12(121), Aug. 6, 1981,
95 Stat. 164;
Pub. L. 101–225, title III, § 307(7), Dec. 12, 1989,
103 Stat. 1925;
Pub. L. 104–239, § 5(a), Oct. 8, 1996,
110 Stat. 3131, prohibited the operation of a competing foreign-flag vessel.