The only overlays allowed on windscreens are anti-glare bands that extend no lower than the bottom of the sun visors, and film overlay stone guards on trucks and buses.
Windscreens must have a VLT (The amount of 'visible' light that passes through a vehicle's windscreen and windows is measured in visible light transmittance (VLT). Clear glass has a VLT of approximately 85 percent.) of 70 percent or more.
Front side windows
'Front side windows' means glazing forward of the left or right of the driver's seat back. These windows must have a VLT of 35 percent or more, with or without any film overlays.
The diagrams below show which windows on different vehicles may have film overlays, and the required VLT levels.
* A vehicle that has nine or fewer seating positions, including the driver's seat, has tinting restrictions for all the windows:
All other vehicles, including those used as stretch limousines or for transporting the deceased, have restrictions on the windscreen and front side windows, but can have any level of tinting film applied to the rear and side rear windows, and the back window.
Please note, though, that any vehicle with an overlay applied to a window that is further back than the driver's seat must have external rear view mirrors on each side.
How are window film overlays checked?
When you take your vehicle for its warrant of fitness (WoF) or certificate of fitness (CoF) inspection, the inspector will check the VLT level by:
* using a calibrated VLT meter, or
* checking any label inserted by the installer under the overlay, or
* checking any label placed over the overlay by an authorised installer or a Land Transport New Zealand agent, or
* checking relevant documentation supplied by you.
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