No, 35% window tint is not legal in Montana for front-side windows. State law mandates a minimum 24% light transmittance (VLT) for passenger vehicles, with reflectivity limits of 35% or less. Local enforcement by Montana Highway Patrol and county sheriffs targets non-compliant vehicles during roadside inspections.
Key Regulations for 35% Window Tint in Montana
- Front-side windows must allow at least 24% of light to pass through (35% tint exceeds this threshold).
- Reflectivity for all windows cannot exceed 35%, regardless of VLT.
- Medical exemptions require a physician’s certification filed with the Montana Department of Justice, valid for up to two years.
Montana’s 2026 regulatory review may tighten enforcement, particularly for aftermarket tint installations. Dealers and installers face liability for non-compliant products under Montana Code Annotated § 61-9-406. Vehicles registered out-of-state must comply with Montana standards upon transfer of registration.