72. No person may use a trail otherwise than in or on an authorized off-highway vehicle or a maintenance vehicle, or in or on a sleigh or trailer towed by such a vehicle, except
(1) to cross the trail as safely and as directly as possible without interfering with traffic; or
(2) in the case of the passenger of a vehicle, to travel on foot on the extreme right-hand side of a steep ascending part of a trail having a slope inclination percentage equal to or greater than that provided for by regulation.
However, that prohibition does not apply on a trail section situated on the negotiable portion of a road.
For the purposes of the first paragraph, the operation of an off-highway vehicle on a trail is not authorized if a user fails to comply with any of the conditions or restrictions on operation provided for in this Act or another Act, including payment of the access fee for the trail unless the operator is exempted by government regulation.
The prohibition provided for in this section does not apply to vehicles operated by peace officers or to ambulances, firefighting vehicles or vehicles operated by other persons in the performance of safety-related duties when proceeding to a location where their immediate action is required.