Any dealer in motor vehicles may operate or move, or cause to be operated or moved, any motor vehicle on the highways for a distance of no more than twenty-five miles from a vessel, railway depot, warehouse, or any place of shipment or from a factory where manufactured or assembled to a salesroom, warehouse, or place of shipment or transshipment without registering them and without license plates attached thereto, under a written permit first obtained from the local law-enforcement authorities having jurisdiction over the highways and on displaying in plain sight on each motor vehicle a placard bearing the name and address of the dealer authorizing or directing the movement.