License Plate Cover and Frame Rules in Washington

Washington puts both the display duty and the prohibition in one registration statute, RCW 46.16A.200, rather than in the equipment chapter. Subsection (5)(a) sets out how plates must be carried: conspicuously at the front and rear where two plates were issued, on the rear alone for a trailer, semitrailer, camper, moped, collector vehicle, horseless carriage, or motorcycle, in a horizontal position no more than four feet from the ground, and kept clean and uncovered and able to be plainly seen and read at all times. The words clean and uncovered are what make even a clear, unshaded plastic shield unlawful in Washington. There is no legibility test to argue about for a cover, because the statute reaches the act of covering itself.

Subsection (7)(c) turns that duty into an express unlawful act and names the products. It is unlawful to use license plate holders, frames, covers, or other materials that conceal, obstruct, distort, change, alter, or make a license plate or plates illegible. Distort and alter are the terms that reach the anti-camera and anti-photo-radar products sold as reflective, prismatic, or lenticular covers, since those work by changing how the plate reads from an angle rather than by hiding it. The single exception, at (7)(c)(ii), is narrow: license plate frames may be used only if the frames do not obscure license tabs or identifying letters or numbers on the plates and the plates can be plainly seen and read at all times. Because Washington puts the month and year tabs on the plate itself, a thick dealer frame that laps over the tab corner fails this test even when every digit is visible.

The genuinely unusual part of the Washington rule is the rack and hitch allowance the Legislature added in 2022 and refined in 2024. Under RCW 46.16A.200(5)(b)(ii), a vehicle that has two plates properly attached may have one of them temporarily obstructed by a trailer hitch, a wheelchair lift or wheelchair carrier, a trailer being towed, or a bicycle rack, ski rack, or luggage rack, or by the cargo any of those devices is carrying. Subsection (5)(b)(iii) attaches two conditions: the device must be installed according to manufacturer specifications or generally accepted installation practices, and the device or its cargo must not prevent the plate from being read from one or more accessible viewing angles when the vehicle is parked. A towed trailer that carries its own compliant plate is excused from the parked-readability condition. Subsection (5)(b)(iv) extends the same relief to a single trailer plate blocked by a forklift transport device used for product delivery, and even allows that plate to be relocated more than four feet from the ground. None of these provisions mention covers, and the drafting is deliberate: the Legislature carved out physical accessories that happen to sit in front of a plate, not products designed to sit on one.

One further exception is administrative rather than statutory. RCW 46.16A.200(5)(b)(i) lets the Washington State Patrol grant an exception to the display requirements where the body construction of the vehicle makes compliance impossible, which is the route for a custom or kit-built vehicle with nowhere to mount a front plate.

A plate cover also creates a second, separate violation after dark. RCW 46.37.050(3) requires either a tail lamp or a separate lamp to illuminate the rear registration plate with a white light and render it clearly legible from fifty feet to the rear, wired to light whenever the head lamps are on. A smoked or tinted cover defeats that fifty-foot legibility standard, so the same accessory can support both a plate-display citation under chapter 46.16A RCW and an equipment citation under chapter 46.37 RCW.

Note for readers checking the statute directly: the Legislature has an amendment to RCW 46.16A.200 taking effect January 1, 2027, so the official site prints the section twice. The change is confined to replacement fees for defective plates under RCW 46.17.260. The display rules in subsection (5) and the unlawful acts in subsection (7) are word for word identical in both printed versions, so nothing about covers or frames changes on that date.

A plate cover violation is a traffic infraction, not a crime. 200. 200(7)(e) makes transferring plates between vehicles without applying first a traffic infraction subject to a fine not to exceed $500, and directs the law enforcement agency to confiscate the plates and return them to the Department of Licensing for nullification. 110(7). 010(2). 200(9)(a)(iii) obliges the owner to apply for a replacement plate.