The provisions of section 404 of this title are made applicable to the Potomac and Anacostia Rivers, and after July 25, 1912 , harbor lines in the District of Columbia, or elsewhere on said rivers, shall be established or modified as therein provided. (July 25, 1912, ch. 253, § 1, 37 Stat. 206 .) Editorial Notes Codification Section is from part of section 1 of act July 25, 1912 , popularly known as the “Rivers and Harbors Appropriation Act of 1912”. CFR Title Parts 33 320 , 325 , 326 , 329 , 330 , 331