46 C.F.R. § 13.205 Proof of service for “Tankerman-PIC” endorsement.
Title 46 - Shipping
Service must be proved by a letter on company letterhead from the owner, operator, or master of the vessel on which the applicant obtained the service. The letter must contain the information described in §13.127(a).
Title 46: Shipping
PART 13—CERTIFICATION OF TANKERMEN
Subpart B—Requirements for “Tankerman-PIC” Endorsement
§ 13.205 Proof of service for “Tankerman-PIC” endorsement.

