46 U.S.C. § 10103

1. (a)A master of a vessel to which section 8701(a) of this title applies, who engages or discharges a seaman, shall submit reports to the vessel owner in the form, content, and manner of filing as prescribed by regulation, to ensure compliance with laws related to manning and the engagement and discharge of seamen.
2. (b)This section does not apply to a ferry or towing vessel operated in connection with a ferry operation, employed only in trades other than with foreign ports, lakes, bays, sounds, bayous, canals, or harbors.