Display of Number Plates 23 V.S.A. § 511
A motor vehicle operated on any highway shall have displayed in a conspicuous place either one or two number plates as the Commissioner may require. Such number plates shall be furnished by the Commissioner and shall show the number assigned to such vehicle by the Commissioner. If only one number plate is furnished, the same shall be securely attached to the rear of the vehicle. If two are furnished, one shall be securely attached to the rear and one to the front of the vehicle. The number plates shall be kept entirely unobscured, and the numerals and letters thereon shall be plainly legible at all times. They shall be kept horizontal, shall be so fastened as not to swing, excepting, however, there may be installed on a motor truck or truck tractor a device that would, upon contact with a substantial object, permit the rear number plate to swing toward the front of the vehicle, provided such device automatically returns the number plate to its original rigid position after contact is released, and the ground clearance of the lower edges thereof shall be established by the Commissioner
A person shall not operate a motor vehicle unless a number plate or number plates are displayed as provided in this section.