641. The public servants of the Sûreté du Québec designated by the Director General of the Sûreté du Québec to carry out the provisions of this Code are peace officers responsible for its application with respect to driving schools and the following road vehicles:(1) a motor vehicle used by a driving school for instruction purposes;
(2) a bus, a minibus, a commercial vehicle, a taxi and a combination of road vehicles;
(3) a vehicle used for the transportation of permanently attached equipment and provided with a load space;
(4) a vehicle designed mainly to do specific work and permanently equipped for that purpose;
(5) a vehicle equipped to refuel, repair or tow road vehicles;
(6) a motor vehicle owned by a farmer and used for the transportation of agricultural products or materials necessary for their production.