You do have the option to register the vehicle with the MTO at a lower RGVW than what the actual vehicle rating is. Just don't get caught over what you register it for. My F150 came with an optional GVW package that meant the plates were going to cost me more based on the RGVW. The dealer when they plated the truck registered it with a lower RGVW than is on the sticker on the door pillar. I'm not sure if there is a lower limit that you can use but you can use a lower number.