CFR › Title 33 › Part 173 › §173.3333 CFR §173.33Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe person whose name appears on a certificate of number as the owner of a vessel shall remove the number and validation sticker from the vessel when:(a)The vessel is documented by the Coast Guard;(b)The certificate of number is invalid under paragraph (c) of § 173.77; or(c)The vessel is no longer principally operated in the State where the certificate was issued.