Posters, signs, and stickers on the windshield and windows:

Obstructions on windows are prohibited. No sign, poster, or sticker may be placed on any window of any vehicle, unless it is specifically required by law to be on the vehicle's window.

• Are a fun way to personalize your vehicle.
• Are permitted if they allow the driver at least a little visibility.
• Are prohibited, unless they are otherwise specifically required by law.