United States Code Title 33 — Navigation and Navigable Waters § 503 to 507. Repealed. Pub. L. 100–17, title I, § 135(d), Apr. 2, 1987, 101 Stat. 174 § 503 to 507. Repealed. Pub. L. 100–17, title I, § 135(d), Apr. 2, 1987, 101 Stat. 174