It shall be the duty of every person, including the owners, masters, officers, and agents of vessels, aircraft, transportation lines, or international bridges or toll roads, other than transportation lines which may enter into a contract as provided in section
of this title, bringing an alien to, or providing a means for an alien to come to, the United States (including an alien crewman whose case is not covered by section
of this title) to prevent the landing of such alien in the United States at a port of entry other than as designated by the Attorney General or at any time or place other than as designated by the immigration officers. Any such person, owner, master, officer, or agent who fails to comply with the foregoing requirements shall be liable to a penalty to be imposed by the Attorney General of $3,000 for each such violation, which may, in the discretion of the Attorney General, be remitted or mitigated by him in accordance with such proceedings as he shall by regulation prescribe. Such penalty shall be a lien upon the vessel or aircraft whose owner, master, officer, or agent violates the provisions of this section, and such vessel or aircraft may be libeled therefor in the appropriate United States court.