Section 1232, Pub. L. 92–340, § 13, as added Pub. L. 95–474, § 2, Oct. 17, 1978, 92 Stat. 1478; amended Pub. L. 101–380, title IV, § 4302(j), Aug. 18, 1990, 104 Stat. 539; Pub. L. 104–324, title III, § 312(b), Oct. 19, 1996, 110 Stat. 3920; Pub. L. 115–44, title III, § 315(b)(2), Aug. 2, 2017, 131 Stat. 949, related to enforcement provisions. See section 70036 of Title 46, Shipping.

Section 1232a, Pub. L. 92–340, § 14, as added Pub. L. 101–599, § 2, Nov. 16, 1990, 104 Stat. 3040, related to navigational hazards. See section 70012 of Title 46.

Section 1232b, Pub. L. 92–340, § 15, as added Pub. L. 109–241, title VI, § 602, July 11, 2006, 120 Stat. 553, related to requirement to notify Coast Guard of release of objects into the navigable waters of the United States. See section 70013 of Title 46.