33 C.F.R. § 173.59 Where to submit report.
Title 33 - Navigation and Navigable Waters
A report required by §173.55 must be submitted to: (a) The reporting authority listed in Appendix A of this part where the vessel number was issued, or, if the vessel has no number, where the vessel is principally used; or (b) The reporting authority where the casualty or accident occurred, if it occurred outside the State where the vessel is numbered or principally used.
Title 33: Navigation and Navigable Waters
PART 173—VESSEL NUMBERING AND CASUALTY AND ACCIDENT REPORTING
Subpart C—Casualty and Accident Reporting
§ 173.59 Where to submit report.

