Street-legal all-terrain vehicles in Utah must be equipped with seatbelts. This requirement is enforced to enhance the safety of the occupants by providing necessary restraint in case of sudden stops or collisions. Seatbelts effectively prevent occupants from being thrown out of the vehicle during an accident, reducing the risk of injury or fatality. This safety feature is critical, given the open design and diverse terrain that all-terrain vehicles often traverse. By mandating seatbelts, Utah aims to ensure safer driving experiences and to protect the vehicle's occupants effectively.