Windshields must be free of any what that is not required by law?

Windshields must be free of any stickers that are not required by law because they can obstruct the driver's view and create a safety hazard. When driving, clear visibility is crucial to monitor the road and surrounding environment effectively. Excessive stickers on the windshield can block important sections of the glass, leading to potential blind spots.

While scratches can impair visibility, they may not be something a driver can always eliminate, especially if they occur naturally over time. Paint can also be an issue, but it is typically not applied to windshields in a manner that affects visibility and is more common on body surfaces. Magnets do not belong typically on windshields and, if present, would not usually be a legal requirement. However, stickers, especially those not mandated by law, can significantly affect driver safety, thus necessitating their removal to ensure a clear line of sight.