Window Tint Compliance Labels and Certification Stickers

A window tint compliance sticker is a small label a professional installer places between the film and the glass, usually at the lower rear corner of the driver’s side window, identifying the film manufacturer, the product, and the visible light transmission (VLT) percentage of what was installed. It exists so an officer or inspector can confirm your tint meets state limits without pulling out a meter. Whether you’re required to have one, and what the label must show, depends on the state where your vehicle is registered.

What the Sticker Shows

Exact requirements vary by jurisdiction, but the information on these labels follows a consistent pattern across states that mandate them.

Manufacturer name or registration number, so the film can be traced back to the company responsible for its performance claims.
Product line or model, since a single manufacturer may sell films across a wide VLT range.
Visible light transmission percentage. This is the single most important number on the sticker because it is the figure officers compare against your state’s legal limit.
A compliance statement declaring that the film meets applicable safety standards for motor vehicle glazing materials.

VLT is the percentage of visible light that passes through the combined glass and film. A lower number means a darker window. A 70% VLT window lets most light through and barely looks tinted. A 20% VLT window blocks 80% of incoming light and appears very dark from the outside. When an officer reads the VLT on your sticker, that number needs to be at or above whatever your state sets as the floor for the window position it covers.

Where the Sticker Goes

States that require these labels almost universally specify the lower rear corner of the driver’s side window, placed between the film and the glass surface so it reads from outside the vehicle. Sandwiching it under the film (rather than sticking it on top) protects the label from peeling and weathering while keeping it legible through the tint. The location avoids obstructing the driver’s line of sight and sits exactly where an officer standing at the driver’s door during a traffic stop will look.

If the sticker is missing, peeling, or placed in the wrong spot, some jurisdictions treat the vehicle as non-compliant regardless of whether the tint itself would pass a meter test. The label is the first thing an officer checks. It functions as a quick screen that decides whether a more time-consuming meter reading is necessary.

Not the Same as the Factory DOT Marking

The compliance sticker is often confused with the permanent marking etched into the corner of every piece of factory automotive glass. Those are two different things. The factory marking is a “DOT” symbol followed by a manufacturer code assigned by the National Highway Traffic Safety Administration, paired with an “AS” designation that states what position on the vehicle the glass is approved for. It is required by Federal Motor Vehicle Safety Standard No. 205 and is built into the glass during manufacturing.¹ A tint shop cannot add it.

The AS numbers matter for tinting because they tell you the starting VLT of the glass before any film is applied. AS-1 is laminated windshield glass with at least 70% light transmission. AS-2 is tempered glass at 70% or higher, approved everywhere except the windshield. AS-3 is privacy glass below 70%, permitted only in rear side windows and the rear windshield. Your legal VLT after tinting is measured through the glass and the film together, not through the film alone.

How Officers Use the Sticker

When an officer suspects illegal tint or wants to verify what the sticker claims, they use a handheld tint meter. These meters measure visible light transmission at 550 nanometers by placing a light source on one side of the glass and a sensor on the other. Officers are trained to take readings at more than one spot on the same window because VLT can vary slightly across the surface. The number that comes back reflects the combined transmission of the factory glass and any applied film.

A compliance sticker does not override a meter reading. The label reports what the film should measure; officers keep the authority to verify with their own instrument. Where the sticker earns its keep is in avoiding the test altogether. An officer who sees a properly placed, readable sticker from a recognized manufacturer often moves on without pulling out the meter. In practice, that is the sticker’s real value: it signals that a professional installer stood behind the work, which cuts down on prolonged stops.

State Requirements and Penalties

Whether your state requires a sticker at all, and what happens if you don’t have one, varies widely. Some states mandate a label on every tinted window. Others require stickers only for windows below a certain VLT threshold. A handful have no sticker requirement, relying on meter readings during inspections or traffic stops. These rules sit in state transportation codes and administrative regulations rather than federal law, so there is no single national standard for aftermarket tint labeling.

Consequences for a missing or non-compliant sticker range just as widely. In some jurisdictions, a missing sticker triggers a failed safety inspection even if the tint itself measures within legal limits. In others, a tint violation results in a fix-it citation that gives you a window, often two to four weeks, to bring the vehicle into compliance and show proof of correction. Failing to correct within that timeframe converts the citation into a standard fine. Fines for tint violations across the country generally fall between $50 and several hundred dollars, with repeat offenses carrying steeper penalties in many states.

How to Get a Compliance Sticker

Authorized tint installers receive official compliance stickers directly from film manufacturers as part of their dealer or distributor relationship. The installer applies the label at the time of installation, matching the sticker data to the specific product going onto your glass. A sticker for one product line does not validate a different film, even from the same manufacturer. Before choosing a tint shop, confirm that they provide certified labels as part of the service. Any reputable shop in a state that requires stickers will include them without being asked.

If you install tint yourself, getting a valid sticker becomes the hard part. Manufacturers overwhelmingly restrict sticker distribution to their authorized installer network, because the label certifies that the product was applied correctly by someone trained to do it. Some states let self-installers bring their vehicle to an authorized shop for a post-installation inspection and sticker, though shops may charge a small fee. Others offer no path at all, which means a DIY tint job in a sticker-mandatory state leaves you exposed to a citation at every checkpoint or inspection station. For most people in those states, professional installation is worth the cost for this reason alone.

Medical Exemption Stickers Are Different

Most states offer a medical exemption that allows darker-than-normal tint for people with conditions that make them unusually sensitive to sunlight. The qualifying conditions vary by state but commonly include lupus, albinism, porphyria, xeroderma pigmentosum, severe photosensitivity reactions, and certain skin cancers. Some states maintain a closed list of qualifying diagnoses. Others allow any condition a physician certifies as requiring reduced light exposure.

Obtaining the exemption almost always requires a physician to complete a state-specific form. The completed form goes to your state’s motor vehicle or public safety agency, which issues either an exemption certificate, a special sticker, or both. Medical exemption stickers typically look distinct from standard compliance labels, often using a different color or coding system so officers can recognize them at a glance.

Carrying both the sticker on the window and the supporting medical paperwork inside the vehicle matters. The sticker alone tells an officer that an exemption exists, but without the physician’s certification to back it up, you can still be cited. Officers will ask to see the documentation. Some states require periodic renewal, with review periods ranging from annual to every few years, though certain permanent conditions may receive indefinite approval. Check with your state’s motor vehicle agency for the renewal timeline that applies.

Commercial Vehicles Follow Stricter Rules

If you drive a commercial motor vehicle, the standards tighten. Under federal regulations, any coloring or tinting on the windshield and the windows immediately to the driver’s left and right must allow at least 70% light transmission. This restriction does not apply to other windows on the vehicle. All glazing on a commercial vehicle manufactured after December 25, 1968, must meet FMVSS No. 205 and carry the required DOT markings.²

Placement of stickers and decals on a commercial windshield is also regulated. Inspection decals and legally required stickers may only be placed at the bottom or sides of the windshield, must not extend more than 4.5 inches from the bottom edge, and must sit outside both the area swept by the wipers and the driver’s sight lines to road signs and signals.²