Subject to such conditions and limitations as the Attorney General
shall prescribe, all exclusive privileges of exchanging money, transporting passengers or baggage, keeping eating houses, or other like privileges in connection with any United States immigrant station, shall be disposed of to the lowest responsible and capable bidder (other than an alien) in accordance with the provision of section 6101 of title 41
and for the use of Government property in connection with the exercise of such exclusive privileges a reasonable rental may be charged. The feeding of aliens, or the furnishing of any other necessary service in connection with any United States immigrant station, may be performed by the Service without regard to the foregoing provisions of this subsection if the Attorney General shall find that it would be advantageous to the Government in terms of economy and efficiency. No intoxicating liquors shall be sold at any immigrant station.