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 Mississippi, window tint laws are regulated under the Mississippi Code Section 63-7-59. These laws specify the amount of visible light transmission (VLT) allowed for vehicle windows. Mississippi law requires a minimum VLT of 28% for the front side windows and a minimum of 28% for the back side and rear windows. The windshield may have a non-reflective tint strip on the top, but it must not extend more than 5 inches below the top of the windshield or below the AS1 line, whichever is longer. The state also measures visual light reflection (VLR), and the front side, back side, and rear windows must not be more than 20% reflective. Mississippi recognizes medical exemptions for individuals who require a lower VLT due to medical conditions, and they must carry documentation from a licensed physician. If a driver is cited for illegal window tint in Mississippi, it is considered a misdemeanor, and they may receive a 'fix-it' ticket, which allows them to correct the violation within a specified period to avoid further penalties. Failure to comply can result in fines, additional tickets, and potentially a warrant for arrest if court orders are ignored.