All states have traffic laws that limit the amount of window tint on motor vehicles—often by specifying the amount of visible light transmission (VLT) that is required. VLT is the amount of light that is transmitted through the window and into the vehicle. For example, a 70%VLT means that 70% of light will pass through the window and 30% will be reflected. Thus, a lower VLT indicates a darker film or tint.

Another term to know is visual light reflection (VLR)—which is the opposite of VLT. VLR is the amount of solar energy that is reflected off the glass and away from the inside of the vehicle.

In most states tickets or citations for illegal window tint are known as fix-it tickets and the ticket or citation will indicate that it is a correctable violation of traffic laws. For example, if you fix the window tint problem within the required period, pay a small fine, and get the signature of an authorized person (a local police officer) the court may dismiss the ticket.

But if you fail to fix the window tint problem within the required period you must pay the fine for the violation and you may be issued another ticket that will be part of your driving record. And if you fail to pay the ticket or appear in court on the hearing date the court may issue a warrant for your arrest.

Window tint laws vary from state to state and some states have exemptions for certain vehicles such as limousines and recognize medical exemptions when the driver has a written statement from a licensed medical doctor, ophthalmologist, or optometrist.

In Wyoming, window tint laws are regulated under state statutes which specify the amount of visible light transmission (VLT) allowed for vehicle windows. The VLT percentage indicates how much light is allowed to pass through the window tint film. Wyoming law requires a minimum VLT of 28% for the front side windows and has no restriction on the VLT for the rear side and back windows. The front windshield may have non-reflective tint above the manufacturer's AS-1 line. Reflective tint is regulated by visual light reflection (VLR) standards, and Wyoming law permits a certain level of reflection for window tints. If a vehicle's window tint does not meet the state's legal requirements, the owner may receive a 'fix-it' ticket, which is a correctable violation. The individual can avoid penalties by correcting the tint to comply with the legal standards, paying a fine, and obtaining verification from an authorized person, such as a local police officer. Failure to correct the issue within the specified period can result in fines, additional tickets, and potentially an arrest warrant if court directives are not followed. Wyoming also recognizes medical exemptions for individuals who require darker tints due to medical conditions, provided they have documentation from a licensed medical professional.