Wyo. Stat. § 37-9-409
All railroads, shipping cars, or parts of cars of all commodities, from any point in the state of Wyoming, to consignees in any other part of this state, shall give time, free of charge, for loading and unloading said cars, or parts of cars, as follows: All loaded cars, taking track delivery, which are to be unloaded by the consignee thereof, or the party whose interest may appear, or cars set for loading which are to be loaded by consignor, shall be limited to forty-eight (48) hours of free time, computed from seven (7:00) o'clock a.m., of the day following the day legal notice of arrival is given (having been placed at an accessible point for unloading), and may be subject thereafter to a charge of one dollar ($1.00) per car for each day, or fraction of a day, that they may remain unloaded, in possession of the railroad company after said free time; provided, however, that if after placing a car, or cars, as required in this section, the railroad company shall, during or after free time, temporarily remove all, or any of them, or in any way obstruct the unloading of same, the consignee shall not be chargeable with the delay caused thereby; provided, that when on account of delay or irregularity of transportation, cars are bunched and delivered to consignee in numbers beyond his reasonable ability to load and unload within the free time prescribed by these rules, he shall be allowed by the carrier such additional time as may be necessary to load and unload cars, so in excess, by the exercise of usual diligence on the part of the consignee.
W.S. 37-9-409