33 C.F.R. § 6.10-7
The identification credential to be issued by the Commandant shall be known as the Coast Guard Port Security Card, and the form of such credential, and the conditions and the manner of its issuance shall be as prescribed by the Commandant after consultation with the Secretary of Labor. The Commandant shall not issue a Coast Guard Port Security Card unless the Commandant is satisfied that the character and habits of life of the applicant therefor are such as to authorize the belief that the presence of such individual on board a vessel or within a waterfront facility would not be inimical to the security of the United States. The Commandant shall revoke and require the surrender of a Coast Guard Port Security Card when the Commandant is no longer satisfied that the holder is entitled thereto. The Commandant may recognize for the same purpose such other credentials as the Commandant may designate in lieu of the Coast Guard Port Security Card.
33 C.F.R. §6.10-7