46 U.S.C. § 5110
Submersible vessels
Notwithstanding sections 5103–5105 of this title, the Secretary may prescribe regulations for submersible vessels to provide a minimum level of safety. In developing the regulations, the Secretary shall consider factors relevant to submersible vessels, including the structure, stability, and watertight integrity of those vessels.
( Pub. L. 99–509, title V, § 5101(2) , Oct. 21, 1986 , 100 Stat. 1917 .)