15. The following road vehicles, unless used on a public highway, are exempt from registration:(1) a vehicle stocked by the manufacturer or, during delivery, a vehicle delivered by a manufacturer to a dealer;
(2) a vehicle which a dealer holds in stock for sale;
(3) a vehicle entrusted to the management of the Public Curator;
(4) a vehicle seized or impounded by a peace officer;
(5) a vehicle designed mainly for use on snow, other than a snowmobile to which the Act respecting off-highway vehicles (chapter V-1.2) applies, and a tractor owned by a farmer, in the cases prescribed by regulation.