46 CFR § 140.1005
Suspension and revocation
April 15, 2021
An individual is subject to proceedings under the provisions of 46 U.S.C. 7703 and 7704, and part 5 of this chapter with respect to suspension or revocation of a license, certificate, document, or credential if the individual holds a license, certificate of registry, merchant mariner document, or merchant mariner credential and:
(a) Commits an act of misconduct, negligence or incompetence;
(b) Uses or is addicted to a dangerous drug; or
(c) Violates or fails to comply with this subchapter or any other law or regulation intended to promote marine safety; or
(d) Becomes a security risk, as described in 46 U.S.C. 7703.