46 C.F.R. § 153.902
Expiration and invalidation of the Certificate of Compliance
(a) The Certificate of Compliance shows its expiration date.
(b) The endorsement of a Certificate of Compliance under this part is invalid if the vessel does not have a valid IMO Certificate of Fitness.
(c) The endorsement on a Certificate of Compliance invalidated under paragraph (b) of this section, becomes valid again once the ship has the IMO Certificate of Fitness revalidated or reissued.
See § 153.809 for procedures for having a Certificate of Compliance reissued.