33 C.F.R. § 81.18
(a) In accordance with 33 U.S.C. 1605(c), a notice is published in the Federal Register of the following:
(c) The owner or operator of a vessel issued a Certificate shall ensure that the vessel does not operate unless the Certificate of Alternative Compliance or a certified copy of that Certificate is on board the vessel and available for inspection by Coast Guard personnel.
(Approved by the Office of Management and Budget under control number 1625-0019)
[CGD 77-136, 47 FR 13800, Apr. 1, 1982, as amended by CGD 88-052, 53 FR 25119, July 1, 1988; CGD 96-026, 61 FR 33663, June 28, 1996; CGD 78-82, 43 FR 54186, Nov. 20, 1978; USCG-2006-25150, 71 FR 39208, July 12, 2006; USCG-2010-0351, 75 FR 36281, June 25, 2010; USCG-2014-0410, 79 FR 38431, July 7, 2014]