C.R.S. § 35-43-208

Unless the hide has been previously inspected and released by a duly authorized Colorado brand inspector, it is unlawful for any person to possess or to kill livestock to obtain any part of the animal for his or her own use without preserving the hide of such animal intact with a complete unskinned tail attached thereto for a period of not less than thirty days, during which period the hide shall be presented upon the demand of any person.