On engagement for a voyage upon which shipping articles are required, each merchant mariner must present to the master or individual in charge of the vessel every document, certificate, credential, or license required by law for the service the mariner would perform. [CGD 94-004, 61 FR 56637, Nov. 4, 1996, as amended by USCG-2006-24371, 74 FR 11260, Mar. 16, 2009; USCG-2004-17914, 78 FR 77999, Dec. 24, 2013]