In what situation can tint be applied without restrictions?

Tint can be applied without restrictions on the rear windows of SUVs and trucks because these vehicles typically have more lenient regulations regarding window tinting compared to passenger cars. This allowance is based on safety regulations, which consider visibility and the ability to see into the vehicle.

For most passenger vehicles, there are specific limitations on how dark the tint can be, especially on the front windshield and front side windows, as these are critical for the driver's visibility. In contrast, SUVs and trucks often have larger rear windows where tinting does not significantly impair visibility for the driver and can enhance comfort by reducing heat and glare from sunlight.

The other options reflect restrictions that exist to maintain safety and visibility standards. For instance, front windshields have strict rules due to their importance in terms of road safety, while vehicles with no windows are not applicable since they don't present a scenario for tint application.