46 C.F.R. § 2.01-50
Persons other than crew on towing, oyster, or fishing steam vessels
(a) A steam vessel engaged in towing, oyster dredging and planting, and fishing may be permitted to carry persons in addition to its crew.
(b) The application for a permit to carry such persons may be included in the application described in § 2.01-1. If granted it is endorsed on the certificate of inspection.