46 CFR 67.50: Requirement for title evidence.

The owner of a vessel must present title evidence in accordance with one of the methods specified in this subpart:

(a) When application is made for a coastwise endorsement for a vessel which has not previously been qualified for such endorsement;

(b) For initial documentation of a vessel;

(c) When the ownership of a documented vessel changes in whole or in part;

(d) When the general partners of a partnership owning a documented vessel change by addition, deletion, or substitution, without dissolution of the partnership; or

(e) When a vessel which has been deleted from documentation is returned to documentation and there has been an intervening change in ownership.