((a)) ** Suspension and revocation** After notice and opportunity for a hearing, the Secretary of Transportation may, and at the request of the Administrator shall, suspend or revoke a permit issued to a vessel under this chapter for a violation of this chapter or a regulation prescribed under this chapter.

((b)) ** Injunctions** The Secretary or the Administrator may bring a civil action to enjoin any operation in violation of this chapter or a regulation prescribed under this chapter in the district court of the United States for the district in which the violation occurred.