Montana Tint Laws
Montana’s car window tinting laws, established in 1991 and later amended in 2007, provides specific guidelines regarding the darkness and reflectiveness of window tints. To help you navigate these regulations, we’ve compiled the essential information you need for your vehicle’s window tint, including darkness, reflectiveness, and additional rules and regulations.
Disclaimer
While I have a background in commercial law and strive to provide accurate and informative content, it’s important to note that I am not a legal expert. The information presented in this blog is based on my interpretation of the subject matter, and laws can vary by location and change over time. It is strongly recommended that readers verify all sources of information and consult with legal professionals or relevant authorities before making any decisions related to tint laws.
Understanding the Terminology Regarding Tint Laws
The most important part of the legislation is understanding what VLT is and how law enforcement services check or test the percentage.
What is VLT
VLT, or Visible Light Transmission, is a measure of the amount of visible light that can pass through a window tint or film. It is commonly used to determine the darkness or opacity of window tints, and it’s an important factor in window tinting laws and regulations.
VLT is typically expressed as a percentage. For example, a window tint with a VLT of 20% allows only 20% of visible light to pass through, making it relatively dark and less transparent. Conversely, a window tint with a VLT of 70% allows 70% of visible light to pass through and is much lighter and more transparent.
How do Law Enforcement services test the VLT percentage?
Window tinting laws vary by jurisdiction, and they often specify the maximum allowable VLT for different types of windows on a vehicle, such as the front windshield, front side windows, rear side windows, and rear window. These laws are designed to ensure that drivers have adequate visibility and that law enforcement can see into vehicles for safety and identification purposes. The manner that they go about testing the VLT is by using a VLT gauge/meter.
Here is a YouTube Short from @TrafficServices and @TorontoPolice showcasing the device and how it works. Even though it is in Canada, it still is helpful to understand how the tint darkness is measured.
Window Tint Darkness in Montana:
The regulations regarding window tint darkness in Montana are based on the percentage of visible light transmission (VLT), which is the amount of light allowed through your car windows. These rules differ for sedans and SUVs/vans.
Montana Car Tint Laws For Sedans:
- Windshield: Non-reflective tint is permitted above the manufacturer’s AS-1 line, allowing room for personalization without compromising visibility.
- Front Side Windows: Montana law requires that front side windows allow more than 24% of light to pass through, ensuring safety and visibility for the driver.
- Back Side Windows: Back side windows must allow more than 14% of light to pass through, offering a degree of privacy while maintaining safety.
- Rear Window: Similar to back side windows, the rear window must allow more than 14% of light transmission.
Tint Laws For SUVs and Vans in Montana:
- Windshield: Non-reflective tint is allowed above the manufacturer’s AS-1 line, without specifying a particular VLT percentage.
- Front Side Windows: Front side windows of SUVs and vans must also allow more than 24% of light in for safety and visibility.
- Back Side Windows: Montana law permits “any darkness” on the back side windows of SUVs and vans, without specifying a specific VLT percentage.
- Rear Window: Similar to back side windows, the rear window of SUVs and vans can have “any darkness” while adhering to the law.
Montana’s window tint laws also state that window tint should not substantially impair the ability to see into the motor vehicle. Interpretations of this provision may vary, so it’s wise to avoid tints with less than 14% VLT on all vehicles to ensure safety and compliance.
| Type of Window | Sedans | SUVs/Vans |
|---|---|---|
| Windshield | Non-reflective tint allowed above the manufacturer’s AS-1 line | Non-reflective tint allowed above the manufacturer’s AS-1 line |
| Front Side Windows | Must allow more than 24% of light to pass through | Must allow more than 24% of light to pass through |
| Back Side Windows | Must permit more than 14% of light transmission | Any darkness can be used on back side windows |
| Rear Window | Must allow more than 14% of light to pass through | Any darkness can be used on the rear window |
Window Tint Reflection in Montana:
Window tint can help reduce glare and heat by reflecting incoming light. Montana law allows a specific level of light reflection when using window tint.
Tint Reflection for Sedans and SUVs/Vans:
- Front Side Windows: Montana law specifies that front side windows must not be more than 35% reflective, without providing a detailed definition of “reflective.”
- Back Side Windows: Similar to front side windows, back side windows must not be more than 35% reflective without further clarification.
Additional Montana Window Tint Rules and Regulations:
Beyond darkness and reflection, Montana’s window tint laws encompass various other important regulations:
Side Mirrors
Montana state law does not impose restrictions on side mirrors, but it’s advisable to maintain them for proper visibility.
Restricted Colors
Montana law prohibits the use of red, yellow, and amber colors on window tints.
Certificates
Film manufacturers are not required to certify the film they sell in the state, so vehicle owners should ensure their chosen film complies with state law.
Stickers
While not mandatory, state law recommends the use of stickers to identify legal tinting.
Medical Exceptions
Montana law allows for medical exemptions for special tint. For specific details about the exemption terms, consult your state law.
Regulations for Out-of-State Drivers
The same regulations apply to out-of-state drivers as those for drivers living in the State.
If you are from States such as Idaho, Wyoming, South Dakota, and North Dakota, you are expected to abide by these laws and regulations.
Penalties
Non-compliance with window tint laws may result in a misdemeanor, carrying potential penalties of up to a $500 fine and/or up to 6 months in county jail, as outlined in Montana law 46-18-212.
Keep in mind that Montana’s tinting laws and regulations may be interpreted differently based on your county or local jurisdiction. For complete compliance and safety, it’s advisable to verify this information with your local Department of Motor Vehicles (DMV) or consult law enforcement authorities.
Our information regarding Montana’s window tint laws was most recently updated in 2023, and we are committed to providing accurate, up-to-date information. If you discover any inaccuracies or outdated details, please feel free to contact us, and we will promptly address them.