According to state law, obstructions on vehicle windows are prohibited. This means:

• You can place posters or signs on the windshield only
• No sign, poster, or other materials may be placed on any window if they obstruct the view
  Explanation:

  "Obstructions on windows are prohibited by state law. No sign, poster, or other materials may be placed on any window of a vehicle if it obstructs the view."
• You can place small decorations on the side windows
• Obstructions are allowed as long as they don’t cover the entire window