A certificate of number issued by the Department is invalid after the date when the: Vessel is documented or required to be documented under 46 CFR §67 as amended; Person whose name appears on the certificate of number as owner of the vessel, transfers all of his ownership of the vessel; or Vessel is destroyed or abandoned. A certificate of number issued by the Department is invalid if the: Application for the certificate of number contains a false or fraudulent statement; Fees for the issuance of the certificate of number are not paid; or Certificate of number has been revoked. A certificate of number is invalid 60 days after the day on which the vessel is no longer principally used in the state where the certificate was issued. The certificate of number is invalid when the person whose name appears on the certificate involuntarily loses ownership interest in the numbered vessel by legal process.