This does not apply if the OWNER of the vehicle is driving it. I recently changed my duallie tags from Comm'l Truck to passenger car. If the tow vehicle is licensed in an individual's name, and that individual is driving, this doesn't apply. RVs and trailers can still be cited for length limits (stay out of Illinois) and any vehicle can be pulled over if it appears overweight or dragging a**. The name thing on the side is true. Barney can pull you over to verify things if he's having a bad day.