1. The provisions of section 474 of the Highway Safety Code (chapter C-24.2) are suspended with respect to a flexible folding aerodynamic system installed at the rear of a road vehicle provided that, as shown,(1) any part of the system located at more than 1.9 m from the ground does not exceed, when unfolded, by more than 152 cm the rear end of the vehicle;
(2) any part of the system located at less than 1.9 m from the ground does not exceed, when unfolded, a virtual line connecting the following points:(a) a point located at 1.74 m from the ground and 121 cm from the rear end of the vehicle;
(b) a point located at the rear end and the lowest part of the vehicle bumper or, if there is no bumper, a point located at the lowest part of the rear end of the vehicle;
(3) any part of the system does not exceed, when folded, by more than 30.5 cm the rear end of the vehicle.