The Secretary of the Treasury or the Governor of Guam or of the Northern Mariana Islands as provided in section 80304 of this title, or, when the violation of this chapter involves contraband described in paragraph (2) or (5) of section 80302(a), the Attorney General or a person authorized by another law to enforce section 80302 of this title, shall seize an aircraft, vehicle, or vessel involved in a violation of section 80302 and place it in the custody of a person designated by the Secretary, the Attorney General, or appropriate Governor, as the case may be. The seized aircraft, vehicle, or vessel shall be forfeited, except when the owner establishes that a person except the owner committed the violation when the aircraft, vehicle, or vessel was in the possession of a person who got possession by violating a criminal law of the United States or a State. However, an aircraft, vehicle, or vessel used by a common carrier to provide transportation for compensation may be forfeited only when—