§ 884. Charges for transportation subject to interstate transportation provisions
No carrier shall charge, collect, or receive for transportation subject to subtitle IV of title 49 of persons or property, under any joint rate, fare, or charge, or under any export, import, or other proportional rate, fare, or charge, which is based in whole or in part on the fact that the persons or property affected thereby is to be transported to, or has been transported from, any port in a possession or dependency of the United States, or in a foreign country, by a carrier by water in foreign commerce, any lower rate, fare, or charge than that charged, collected, or received by it for the transportation of persons, or of a like kind of property, for the same distance, in the same direction, and over the same route, in connection with commerce wholly within the United States, unless the vessel so transporting such persons or property is, or unless it was at the time of such transportation by water, documented under the laws of the United States. Whenever the Secretary of Transportation is of the opinion, however, that adequate shipping facilities to or from any port in a possession or dependency of the United States or a foreign country are not afforded by vessels so documented he shall certify this fact to the Surface Transportation Board, and the Board may, by order, suspend the operation of the provisions of this section with respect to the rates, fares, and charges for the transportation by rail of persons and property transported from, or to be transported to such ports, for such length of time and under such terms and conditions as he may prescribe in such order, or in any order supplemental thereto. Such suspension of operation of the provisions of this section may be terminated by order of the Board whenever the Secretary of Transportation is of the opinion that adequate shipping facilities by such vessels to such ports are afforded and shall so certify to the Board.