Minnesota Outlaws Every License Plate Cover, Clear Ones Included

The rule works on two levels. Subdivision 1 of section 169.79 sets the baseline: a vehicle may not be operated, driven or parked on a Minnesota highway unless the plates or permit assigned by the commissioner of public safety are conspicuously displayed in a manner that the view of any plate or permit is not obstructed. Subdivision 7 then adds the specific equipment rule. All plates must be securely fastened so as to prevent them from swinging, displayed horizontally with the identifying numbers and letters facing outward, and mounted in the upright position, and the driver must keep the plate legible and unobstructed and free from grease, dust or other blurring material so the lettering is plainly visible at all times. A plate tucked at an angle under a bumper, or hung on a swinging bracket, fails the mounting half of that sentence before any cover is even fitted.

The sentence that decides the plate-cover question is the last one in subdivision 7, and its reach is deliberately wide. Two protected elements are named: the assigned letters and numbers, and the name of the state of origin, which on a Minnesota plate is the word running across the top. Covering either with any material whatever is unlawful. The statute then removes the argument owners usually make for a clear shield by naming it directly, forbidding any clear or colorless material that affects the plate's visibility or reflectivity. Reflectivity is the operative word. A cover can be optically transparent to the human eye and still cut the retroreflective return that a plate's sheeting is built to give back to headlights and to automated readers, and that is enough to bring it inside the prohibition. There is no exemption in the section for anti-photo film, anti-glare acrylic, or a cover sold as street legal in another state.

Frames are handled by the same language rather than by a separate rule. A frame that sits clear of the characters and of the state name is not what subdivision 7 forbids, but two Minnesota specifics narrow the safe zone. Subdivision 8 places the validation stickers in the lower corners: license plates issued after July 1, 2008 requiring validation must display the month of expiration in the lower left corner of the plate and the year of expiration in the lower right corner, as viewed facing the plate. A dealer frame that laps the bottom edge hides one or both decals and undermines the subdivision 1 requirement that the view of the plate not be obstructed. Fleet-registered vehicles under section 168.127 are the exception, showing either a validation sticker in the lower right corner or a distinctive plate reading FLEET REG across the bottom center.

How many plates you must keep uncovered depends on the vehicle. Under subdivision 6, an ordinary passenger car carries one plate on the front and one on the rear, so a front-plate delete is its own violation independent of any cover. Subdivision 3 gives a single rear plate to a motorcycle, motor scooter, motorized bicycle, motorcycle sidecar, semitrailer, a trailer registered above 3,000 pounds gross vehicle weight, or a vehicle running dealer plates, and a motorcycle issued vertical plates under section 168.12, subdivision 2a may display that plate vertically. Subdivision 4 lets a collector vehicle with pioneer, classic car, collector or street rod plates, and any 1972-or-earlier vehicle used for general transportation, run either one rear plate or a front and rear pair at the owner's discretion. Subdivision 5 puts a single plate on the front of a truck-tractor, road-tractor or farm truck. Subdivision 3a sends the plate or sticker of a lifetime-registered trailer of 3,000 pounds GVW or less onto the side of the frame tongue near the hitch, and subdivision 3b, added in 2024, excuses a roadable aircraft from displaying a plate at all.

A covered or obscured plate is a violation of chapter 169 and, under Minn. 89, subd. 1, a petty misdemeanor unless the chapter declares otherwise. Subdivision 2 of that section caps a petty misdemeanor at a fine of not more than $300, with no jury trial and no imprisonment. 89, subd. 4 requires the court to pull the driver's record from the commissioner of public safety before sentencing, with the cost taxed to the convicted driver. Practically, the obscured plate is usually the reason a stop happens rather than the end of it, because subdivision 7 is written as an obligation on the person driving the vehicle and is verifiable from behind at a glance.

Minnesota has no periodic passenger-vehicle safety inspection, so the plate is checked at the roadside by the State Patrol and local police, and there is no annual test at which a cover would be quietly failed and removed.