46 U.S.C. § 12135: Invalidation of certificates of documentation

A certificate of documentation or an endorsement on the certificate is invalid if the vessel for which it is issued—(1) no longer meets the requirements of this chapter and regulations prescribed under this chapter applicable to the certificate or endorsement; or (2) is placed under the command of an individual not a citizen or noncitizen national (as such term is described in section 308 of the Immigration and Nationality Act (8 U.S.C. 1408)) of the United States in violation of section 12131 of this title.