21.2. Despite section 21, a single-seat snowmobile may be modified to add an add-on seat designed for a passenger and having a back rest and molded handles intended for the passenger.
The add-on seat must allow the passenger to use the running boards of the snowmobile or footrests firmly attached to each side of the snowmobile frame.
Despite the first paragraph, two handles reachable by the passenger may replace molded handles provided that a handle is firmly attached to each side of the snowmobile frame.