Iowa Code § 321I.17
The department may authorize the holding of organized special events as defined in this chapter within this state. The department shall adopt rules relating to the conduct of special events held under department permits and designating the equipment and facilities necessary for the safe operation of all-terrain vehicles, off-road motorcycles, and off-road utility vehicles and for the safety of operators, participants, and observers in the special events. A special event may require an entrance fee set by the organizer of the special event. The department may require that part of the entrance fee be credited to pay costs of all-terrain vehicle programs authorized pursuant to section 321I.8. At least thirty days before the scheduled date of a special event in this state, an application shall be filed with the department for authorization to conduct the special event. The application shall set forth the date, time, and location of the proposed special event and any other information the department requires. The special event shall not be conducted without written authorization of the department.
Iowa Code § 321I.17
2004 Acts, ch 1132, §60; 2012 Acts, ch 1100, § 45