Section 174.16 - Verification of hull identification numbers (HINs)(a) As used in this section, "action" means an action by an issuing authority listed in 33 CFR part 173 , Appendix A, to issue, renew, or update the ownership information for a certificate of number under this part but does not include the issuance of a temporary certificate under 33 CFR 174.21 .(b) As of January 1, 2017, before taking any action relating to a vessel imported or manufactured on or after November 1, 1972, the issuing authority must determine whether the vessel has a primary HIN meeting the requirements of 33 CFR part 181 , subpart C.(c) If, pursuant to paragraph (b) of this section, the issuing authority determines that the vessel does not have a primary HIN meeting the requirements of 33 CFR part 181, subpart C, then before taking any action the issuing authority must-(1) Assign such a primary HIN to the vessel; and(2) Verify that the owner of the vessel has permanently affixed the assigned primary HIN to the vessel in compliance with 33 CFR part 181, subpart C.USCG-2003-14963, 77 FR 18701, Mar. 28, 2012