Section 6301 requires the Secretary to prescribe regulations for the immediate investigation of marine casualties in order to determine, as closely as possible, the cause of the casualty; whether the actions of individuals licensed, certificated, or documented have contributed to the cause of the casualty, whether the action of an individual in the Coast Guard contributed to the cause of the casualty, whether there is evidence that an act subjecting the offender to civil or criminal penalty has been committed, and whether there is a need for new laws or to amend or repeal existing laws or regulations in order to prevent a recurrence of the casualty.

Pub. L. 98–89, § 2(h), Aug. 26, 1983, 97 Stat. 599, provided that: “Chapter 63 of title 46 (as enacted by section 1 of this Act) does not supersede section 304(a)(1)(E) of the Independent Safety Board Act of 1974 (49 App. U.S.C. 1903(a)(1)(E)) [see 49 U.S.C. 1131(a)(1)(E), (b)].”

For transfer of authorities, functions, personnel, and assets of the Coast Guard, including the authorities and functions of the Secretary of Transportation relating thereto, to the Department of Homeland Security, and for treatment of related references, see sections 468(b), 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6.