46 C.F.R. § 67.163
(a) Requirement for renewal of endorsement. Endorsements on Certificates of Documentation are valid for 1 year, except for Recreational Endorsements on Certificates of Documentation, which are valid for 1, 2, 3, 4, or 5 years. However, a Certificate of Documentation with a Recreational Endorsement and a Commercial Endorsement will only be valid for 1 year. Prior to the expiration of an endorsement, the owner of a vessel, which is not exempt from the requirement for documentation under paragraph (c) of § 67.9, must apply for renewal of the endorsement(s) by complying with paragraph (b) of this section. The owner of a vessel exempt from the requirement for documentation under paragraph (c) of § 67.9 must either:
Note: Renewal of endorsements on a Certificate of Documentation may be denied if the vessel owner is the subject of an outstanding civil penalty assessed by the Coast Guard.
[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995; USCG-1998-4442, 63 FR 52191, Sept. 30, 1998; USCG-2016-0531, 82 FR 43864, Sept. 20, 2017; USCG-2020-0215, 86 FR 5031, Jan. 19, 2021; USCG-2023-0305, 88 FR 77901, Nov. 14, 2023]