OAR 735-124-0040. Construction of Vehicles

(1) Class “A” and “B” vehicles shall be constructed or accommodated for transporting passengers, and shall be equipped with adequate seats and back rests firmly secured in place, and with such sides and ends as necessary to prevent persons from falling off the vehicle. (2) Bus type vehicles having an enclosed seating compartment capacity of 12 or more workers, unless loaded from the rear, shall be provided with an emergency exit not less than 24 inches wide by not less than 48 inches high situated at the left side or rear of the vehicle. Doors shall be provided on bus type vehicles and shall be kept closed during transit and must operate freely at all times. They must be so constructed as to be easily opened from either inside or outside the vehicle.