49 U.S.C. 1321.
Demurrage shall be assessed by the serving rail carrier, i.e., the rail carrier providing rail cars to a shipper at an origin point or delivering them to a receiver at an end-point or intermediate destination. A serving carrier and its customers (including those to which it delivers rail cars at origin or destination) may enter into contracts pertaining to demurrage, but in the absence of such contracts, demurrage will be governed by the demurrage tariff of the serving carrier.
Any person receiving rail cars from a rail carrier for loading or unloading who detains the cars beyond the period of free time set forth in the governing demurrage tariff may be held liable for demurrage if the carrier has provided that person with actual notice of the demurrage tariff providing for such liability prior to the placement of the rail cars. The notice required by this section shall be in written or electronic form.