License plates (also known as vehicle registration plates or license tags) are generally rectangular metal plates issued by your state’s department of motor vehicles for the purpose of identifying your car. A license plate must be attached to the rear of your car, and in 31 states and the District of Columbia (Washington, D.C.), you must also have a license plate on the front of your car. In a state or district that also requires you to display a license plate on the front of your car, your failure to do so will provide the police with probable cause to stop you and issue a citation at any time. State laws (statutes) generally provide for the specific placement of license plates, stated in minimum and maximum inches from the ground.

In Arizona, state law requires that all motor vehicles must display a license plate on the rear of the vehicle. Arizona does not require a front license plate; only the rear plate is mandated. The rear plate must be clearly visible and kept clean, unobstructed, and free from defacement. The license plate should be securely fastened to the rear of the vehicle in a position that is horizontal and at a height not less than 12 inches from the ground to the bottom of the plate. The plate must also be illuminated at night. Failure to comply with these requirements can result in a traffic citation. It's important for vehicle owners in Arizona to ensure their license plate adheres to these regulations to avoid any legal issues during vehicle operation.