Montana State Regulations
Window Tint Darkness
Tint darkness for sedans:
- Windshield: Non-reflective tint is allowed above the manufacturer’s AS-1 line.
- Front Side windows: Must allow more than 24% of light in.
- Back Side windows: Must allow more than 14% of light in.
- Rear Window: Must allow more than 14% of light in.
Tint darkness for SUV and vans:
- Windshield: Non-reflective tint is allowed above the manufacturer’s AS-1 line.
- Front Side windows: Must allow more than 24% of light in.
- Back Side windows: Any darkness can be used.
- Rear Window: Any darkness can be used.
Window Reflection
- Front Side windows: Must not be more than 35% reflective.
- Back Side windows: Must not be more than 35% reflective.
Source: https://law.justia.com/codes/montana/2019/title-61/chapter-9/part-4/section-61-9-405/