Yes. A quarter window behind the driver falls under the rules each state writes for side glass to the rear of the driver's seat, and those rules give more room than the front-door ones. The quarter window tint law differs between the two states, though. Arizona's statute (A.R.S. 28-959.01) sets only a reflectance limit, and Florida's (Fla. Stat. 316.2954) adds a floor for how much light the film must let through.
Neither statute uses the words "quarter glass." Each describes a window by where it sits relative to the driver. A rear quarter pane, the small fixed piece behind a back door or behind the front door of a coupe, sits behind the driver and joins the back side windows. A small pane ahead of the driver goes with the front glass. Work out the pane's position before any number applies.
The glass work itself is on our quarter glass replacement page. Below are the rules for what may go on that pane, what the new glass must carry, and how factory-dark glass differs from film.
Windows Behind the Driver Have Their Own Rules in Both States
Quarter glass tint is regulated in both states by a ban on material that darkens, colors or mirrors a window, followed by a list of exceptions. The exceptions widen as you move back through the car. The windshield gets the tightest treatment, the front side windows come next, and the rear side glass gets the most room.
A.R.S. 28-959.01 rests its exception for rear side glass on one figure: how much light the treated window reflects. Reflectance is the mirror look some films give a window from outside. That paragraph gives no figure for how dark the glass may be.
Fla. Stat. 316.2954 carries two figures for the same glass. Film may reflect no more than a set share of light, and it must still pass a minimum share through. Both readings are taken with the film on the glass of the car itself.
The practical split follows from that. A dark film with low reflectance can fit Arizona's A.R.S. 28-959.01 and still fail the floor in Florida's Fla. Stat. 316.2954. A highly reflective film fails both. A driver moving a car between the two states should check its film against the new state's figures before assuming it carries over.
Quarter Window Tint Law in Arizona: Reflectance Is the Figure Given
Back side window tint in Arizona falls under paragraph (A)(6) of A.R.S. 28-959.01. It lifts the section from side windows to the rear of the driver, and from rear windows, when the added material gives a luminous reflectance of 35 percent plus or minus 3 percent or less. The paragraph sets no light transmission figure for those windows. A dark film on a rear quarter pane fits it as long as its reflectance stays at or under that line.
Under the Arizona window tint law for front windows, (A)(1) exempts front wing vents and side windows at 33 percent light transmission and 35 percent reflectance, each plus or minus 3 percent. Since that paragraph names wing vents, a small vent pane ahead of the driver goes with the front glass.
Two broad rules frame those exceptions. Subsection (B) bars driving with an object or material on the windshield or side or rear windows that obstructs or reduces the driver's clear view through them. Subsection (C) bars placing a transparent material on those windows if it alters their color or reduces their light transmittance. Each opens with "except as otherwise provided in this section," and the (A) list holds those exceptions.
Read with the (A) list, subsection (C) bars film on a quarter pane behind the driver unless a paragraph in that list lifts it. Paragraph (A)(6) does that through reflectance. A film that reflects more than 35 percent, plus the 3 percent tolerance, has no rear-side exception to stand on.
So the questions for a film installer under this statute are short. What is the film's reflectance, and does the car have working outside mirrors on both sides? There is no darkness percentage in that paragraph to ask about.
Florida: Fifteen Percent Behind the Driver, Tested on the Glass
Florida's tint law for windows behind the driver, Fla. Stat. 316.2954(1)(a), caps film at a total solar reflectance of visible light of not more than 35 percent. That reflectance is measured on the nonfilm side. Its light transmittance in the visible range must be at least 15 percent. Paragraph (1)(a) also sets a lower floor of at least 6 percent on multipurpose passenger vehicles.
Those readings come from film applied to and tested on the rear window glass of the specific vehicle. Glass and film are measured together, so the figure that counts is the one taken on your own car.
The Florida window tint law for front side windows is stricter, at not more than 25 percent reflectance and at least 28 percent transmittance under section 316.2953. Those front figures are also tested with the material on that car's glass. For a quarter pane behind the driver, the 15 and 35 percent pair is the one that applies.
Film is one of several coverings allowed behind the driver. Louvered materials are allowed under (1)(c) if they do not reduce driver visibility by more than 50 percent. Privacy drapes, curtains and blinds are allowed under (1)(d), provided they are open and secure while the car is driven on a public road.
With film on a quarter pane under this section, confirm two readings with the installer. Light transmittance should be 15 percent or more, and reflectance 35 percent or less, both taken with the film on the glass. Keep the factory-glass question apart from that check, because a different section handles it.
Side by Side: Mirrors, Reflectance and Darkness
The table puts the two statutes next to each other for a pane behind the driver. A missing rule is marked as missing, because an absent clause changes what you need to ask.
| Element | Arizona (A.R.S. 28-959.01) | Florida (Fla. Stat. 316.2954 to 316.2957) |
|---|---|---|
| How it is measured | Luminous reflectance of the added material with the glazing | Film tested on the specific vehicle's glass; reflectance read on the nonfilm side |
| Reflectance limit | 35% plus or minus 3% or less | Not more than 35% |
| Transmittance floor | None in the statute text | At least 15%; at least 6% on multipurpose passenger vehicles |
| Mirror condition | Rear window or windows exempt with outside mirrors on both sides showing 200 feet behind | Nontransparent rear window needs side mirrors on both sides (s. 316.294) |
| Factory glazing | No factory exemption; makers of tinted glazing certify compliance | No label for factory glazing meeting FMVSS 205; manufacturer tinting meeting FMVSS 205 exempt |
| Replacing legal material | No clause | No violation |
Dark rear glass comes with a mirror condition in both statutes. Paragraph (A)(10) of the A.R.S. section lifts the rear window or windows from its rules when the car has outside mirrors on the left and right. Each mirror must show the driver the highway for at least 200 feet behind. Under Fla. Stat. 316.2954(2), a rear window made of, covered by or treated with material that makes it nontransparent needs side mirrors on both sides.
Those side mirrors must meet a separate section, s. 316.294. Each mirror clause speaks of the rear window, which the A.R.S. list names apart from side windows behind the driver. Under A.R.S. 28-959.01(A)(10), that pair of mirrors gives an Arizona rear window a second route to an exemption. Under Fla. Stat. 316.2954(2), they are required before a Florida rear window may be nontransparent at all.
The mirrors matter most on a car with dark quarter windows and a dark back window. A cracked or missing right-side mirror on such a car is a legal problem as well as a repair one.
Two cells in the A.R.S. column are empty. That statute sets no light transmittance floor for side windows behind the driver, and it has no clause about replacing material that was legally installed. Both gaps show up in practice: a film check under Florida's Fla. Stat. 316.2954 involves a darkness reading, and one under Arizona's A.R.S. 28-959.01 does not.
Factory Privacy Glass and Installed Film Are Treated Apart
Factory privacy glass gets its darkness from the glass itself, made that way at the plant. Film is a layer added afterward. The glass industry's grading system marks the difference, and FMVSS 205 adopts it through the ANSI/SAE Z26.1 standard.
AS-1 glass lets through at least 70 percent of light and may go anywhere in the car, the windshield included. AS-2 glass also lets through at least 70 percent and may go anywhere except the windshield. AS-3 glass may be darker than 70 percent and belongs only in windows that are not requisite for driving visibility. Dark factory glass behind the driver is AS-3, while a clear pane carries AS-2 or AS-1.
Fla. Stat. 316.2955 and 316.2957 write the split into law. Section 316.2955 makes each installer or seller of sunscreening material give the buyer a label stating the material complies. Section 316.2955 also says labeling is not required for factory glazing that complies with FMVSS 205.
Section 316.2957 goes further. Sections 316.2951 through 316.2956 do not apply to the manufacturer's tinting or glazing of windows that is otherwise in compliance with or permitted by FMVSS 205. In practice, a dark factory quarter pane under those sections needs no film label, and the 15 percent floor is aimed at film. The factory question is whether the glass complies with the federal standard, which leads to the marks in the next section.
A.R.S. 28-959.01 has no matching exemption. It pulls glass makers into its certification rule instead. Subsection (D) has each manufacturer certify to the director that its product or material meets the section's reflectivity and transmittance requirements.
The definitions in (H)(3)(b) count as a manufacturer any person who fabricates, laminates or tempers glazing with the capacity to reflect light, or reduce its transmittance, built in during manufacturing. That definition reaches a glass plant that tints a quarter pane as it tempers it. The statute has no wording that lifts a dark replacement pane out of the section. The maker's certification is how such glass enters the scheme.
Replacement Glass: DOT Marks and the Federal Standard
A replacement quarter pane must meet the same federal standard as the glass the car was built with. Under S5.1.2 of the federal glazing standard, FMVSS 205, glazing intended for the replacement market is required to meet the standard.
The standard has three aims, set out at S2. It seeks to reduce injuries from impact with glass surfaces and to keep windows clear enough for the driver to see. It also aims to lower the chance of occupants being thrown through windows in a collision. A quarter pane serves the last two, since it closes an opening in the cabin and sits in the driver's view over the shoulder.
Under S5.1, glazing for motor vehicles must conform to ANSI/SAE Z26.1-1996 unless the standard provides otherwise. That is where the AS grades come from. Under S6.2, a prime glazing manufacturer certifies its glass by adding two items to the Z26.1 marks. One is the symbol "DOT," and the other is a manufacturer's code mark that NHTSA assigns to that maker.
Those marks answer the next practical question about a new pane. Before it goes in, ask to see the DOT symbol, the maker's code beside it, and an AS grade that suits the window position. A dark pane should read AS-3, and a clear one AS-2 or AS-1.
The marks also connect to Fla. Stat. 316.2957, whose exemption turns on compliance with FMVSS 205. We identify the exact quarter pane from the vehicle details plus the side and position of the opening, and we fit OEM-quality glass. The break itself, and how tempered quarter glass fails, is a separate question from these markings.
Swapping a Broken Pane Without Creating a Violation
Under Fla. Stat. 316.2956(2), the replacement or repair of any material legally installed is no violation of sections 316.2951 through 316.2954. A film that was legal when it went on can be replaced or repaired without the work becoming an offense. To stay inside that clause, match the new film to the legal one it replaces.
The A.R.S. section has no such clause. Any film on the new pane must fit paragraph (A)(6) on its own, and a dark rear window still relies on (A)(6) or the mirror paragraph, (A)(10). Treat the new pane as a fresh install and check each figure again.
Ask these points before a broken pane is swapped:
- Does the new pane match the old one's grade? An AS-3 privacy pane keeps the look of the other dark glass; an AS-2 pane leaves one clear window beside dark ones.
- Does it carry the DOT symbol and a maker's code mark? Those are the federal compliance marks.
- Will film go back on? Get its reflectance figure under the A.R.S. paragraph, or the 15 and 35 percent readings on the glass under the Fla. Stat. section.
- Under section 316.2955, will the film installer supply the compliance label? Factory glass needs none; added film does.
- Are both outside mirrors working? If the back glass is dark too, both statutes tie it to mirrors on each side.
A car that came with dark factory glass behind the driver can take a dark factory-style pane again, with no film involved. If the back window broke in the same event, the rear glass replacement page covers that pane.
These points describe statute text. For a ticket or a dispute over a specific car, a lawyer working from the current statute is the right person to ask.
One Row for a Pane Behind the Driver
| Pane | Film under A.R.S. 28-959.01 | Film under Fla. Stat. 316.2954 | Factory dark glass | Replacement glass |
|---|---|---|---|---|
| Quarter window behind the driver | Reflectance 35% plus or minus 3% or less; no darkness floor | Reflectance up to 35%; transmittance 15% or more (6% on multipurpose passenger vehicles), tested on the glass | AS-3; maker certifies under A.R.S. (D); exempt under Fla. Stat. 316.2957 if it meets FMVSS 205 | Meets FMVSS 205; carries DOT and a maker's code |
Before the new pane goes in, match its AS grade to the old one and confirm the DOT symbol and code are on it. If film goes back on, check it against your own state's figures in the row above. The glass swap and the trim work around it are covered on our quarter glass replacement service page.
Quarter window tint law questions for Arizona and Florida
What markings should replacement quarter window glass carry?
Federal glazing rules say a prime glazing manufacturer adds the letters DOT and a manufacturer code mark that NHTSA assigns, beside the standard ANSI/SAE Z26.1 marks. Ask to see all of them before the pane goes in, including an AS grade that suits a window behind the driver. Privacy glass is graded AS-3.
Does Florida treat a factory-dark quarter window like tint film?
No. Fla. Stat. 316.2957 sets aside a manufacturer's tinting or glazing that complies with or is permitted by FMVSS 205, and section 316.2955 drops the compliance label for compliant factory glazing. The film figures are written for material applied afterward, so a factory pane is judged on the federal standard.
Does Arizona set a minimum light transmission for quarter window tint?
The paragraph for side windows behind the driver, A.R.S. 28-959.01(A)(6), names a luminous reflectance of 35 percent plus or minus 3 percent or less and no transmission figure. The front side windows paragraph, by contrast, carries a 33 percent plus or minus 3 percent transmission number alongside reflectance.
Is swapping a legally tinted quarter window a violation in Florida?
Fla. Stat. 316.2956(2) says replacing or repairing material that was legally installed is no violation of sections 316.2951 through 316.2954. The relief covers material that was legal to begin with. Arizona's section has no matching sentence, so new film there is checked on its own against paragraph (A)(6).
Sources
- Arizona Revised Statutes 28-959.01, materials on windows or windshield
- Florida Statutes 316.2954, windows behind the driver
- Florida Statutes 316.2953, side windows
- Florida Statutes 316.2955, compliance labeling
- Florida Statutes 316.2956, violations and replacement of legal material
- Florida Statutes 316.2957, exemption for motor vehicle manufacturers
- FMVSS 205, glazing materials (49 CFR 571.205)