Colorado Revised Statutes Title 33. Parks and Wildlife § 33-14.5-109. Required equipment--off-highway vehicles

(a) At least one lighted head lamp and one lighted tail lamp, each having the minimum candlepower prescribed by regulation of the division while being operated between the hours of sunset and sunrise;

(b) Brakes and a muffler and spark arrester which conform to the standards prescribed by regulation of the division, which shall be applicable in all cases except for off-highway vehicles being operated in organized competitive events held on private lands with the permission of the landowner, lessee, or custodian of the land, on public lands and waters under the jurisdiction of the division with its permission, or on other public lands with the consent of the public agency owning the land.