Wyo. Stat. § 11-20-220
Should any shipment or any part of a shipment of horses, mules, cattle or sheep listed on a certificate and agreement consigned to an open market be diverted en route from the destination shown, the railroad, trucking firm, trucker or private carrier transporting the shipment shall notify the Wyoming brand inspector at the original destination and the agency that such diversion has been ordered and made. The notice shall be sent within twenty-four (24) hours after diversion is ordered. If the diversion is ordered and made before the shipment leaves Wyoming, the required inspection for brands and ownership shall be made by any Wyoming brand inspector. If the shipment has left Wyoming, the inspection shall be made by a brand inspector having authority to inspect Wyoming livestock outside the state.
W.S. 11-20-220