Every motor vehicle shall display in plain view on the front and rear of the motor vehicle the distinctive number and registration mark, including any county identification sticker and any validation sticker issued under sections 4503.19 and 4503.191 (4503.19.1) of the Revised Code, furnished by the director of public safety, except that a manufacturer of motor vehicles or dealer therein, the holder of an in-transit permit, and the owner or operator of a motorcycle, motorized bicycle, manufactured home, mobile home, trailer, or semi-trailer shall display on the rear only. A motor vehicle that is issued two license plates shall display the validation sticker only on the rear license plate, except that a commercial tractor that does not receive an apportioned license plate under the international registration plan shall display the validation sticker on the front of the commercial tractor. An apportioned vehicle receiving an apportioned license plate under the international registration plan shall display the license plate only on the front of a commercial tractor and on the rear of all other vehicles. All license plates shall be securely fastened so as not to swing, and shall not be covered by any material that obstructs their visibility. (Section 4503.21 of the Revised Code).
Every vehicle with a temporary license placard or windshield sticker shall display the temporary license placard in plain view from the rear of the vehicle either in the rear window or on an external rear surface of the motor vehicle, or display the windshield sticker in plain view on the rear window of the motor vehicle. No temporary license placard or windshield sticker shall be covered by any material that obstructs its visibility.