Whoever intentionally destroys, seriously damages, alters, moves, or tampers with any aid to maritime navigation maintained by the Great Lakes St. Lawrence Seaway Development Corporation under the authority of section 4 of the Act of May 13, 1954 ( 33 U.S.C. 984 ), by the Coast Guard pursuant to section 81 [1] of title 14, United States Code, or lawfully maintained under authority granted by the Coast Guard pursuant to section 83 of title 14 , United States Code, if such act endangers or is likely to endanger the safe navigation of a ship, shall be fined under this title or imprisoned for not more than 20 years, or both. (Added Pub. L. 109–177, title III, § 304(b)(1) , Mar. 9, 2006 , 120 Stat. 235 ; Pub. L. 116–260, div. AA, title V, § 512(c)(2) , Dec. 27, 2020 , 134 Stat. 2756 .) [1] See References in Text note below. Editorial Notes References in Text Section 81 of title 14 , referred to in text, was redesignated section 541 of title 14 by Pub. L. 115–282, title I, § 105(b) , Dec. 4, 2018 , 132 Stat. 4200 , and references to section 81 of title 14 deemed to refer to such redesignated section, see section 123(b)(1) of Pub. L. 115–282 , set out as a References to Sections of Title 14 as Redesignated by Pub. L. 115–282 note preceding section 101 of Title 14 , Coast Guard . Amendments 2020— Pub. L. 116–260 substituted “Great Lakes St. Lawrence Seaway Development Corporation” for “ Saint Lawrence Seaway Development Corporation ”.