36 CFR 10.4 - Shipment.
(a) Elk, buffaloes, and bears may be obtained at the Park and be removed by truck. Elk and buffaloes, when not transported by truck, must be crated individually for rail shipment in less than carload lots. Bears must be crated individually regardless of the number furnished or the character of the conveyance.
(b) The receiver must furnish shipping crates constructed in accordance with National Park Service specifications.