Mich. Comp. Laws § 462.8
Every railroad shall, when within its power so to do, and upon reasonable notice, furnish suitable cars to any and all persons who may apply therefor, for the transportation of any and all kinds of freight in carload lots. Every common carrier shall have sufficient cars and motive power to meet all requirements for the transportation of passengers and property which may reasonably be anticipated. In case of insufficiency of cars at any time to meet all requirements, such cars as are available shall be distributed among the several applicants therefor without discrimination between shippers or between points of shipment, whether competitive or non-competitive: Provided, Preference may be given to shipments of live-stock and perishable property. The commission shall have power to make and enforce, and shall make and enforce reasonable regulations for the furnishing and distribution of freight cars to shippers and switching the same, and for the loading and unloading thereof, and for the weighing of the cars and the freight offered for shipment over any line of railroad and shall fix a reasonable per diem demurrage to be paid for the detention of cars by shipper or consignee (which said car service and demurrage rules and regulations shall be applicable to all traffic whether the same begin or end within the state of Michigan), and for the failure or delay of the railroad in the furnishing of such cars and for the failure of the railroad to move the cars the number of miles per day as ordered by the commission.
MCL 462.8