33 C.F.R. § 174.121
Forwarding of casualty or accident reports
Within 30 days of the receipt of a casualty or accident report, the reporting authority receiving the report must forward a paper or electronic copy of that report to the Commandant (CG-BSX-2), Attn: Boating Safety Division, U.S. Coast Guard Stop 7501, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7501.