Originally Posted by
SMOKEY
OP is in Sydney - but for Vic members, RWC requirements mean that tinted windows can't be darker than 35% (65% light transmission) as it has always been.
BUT, Since Sept last year, new inspection process means RWC testers now have to put a spectrometer against your windows and take a photo of the reading. Obviously anything that doesn't adhere fails. The image (amongst a bunch of others) is stored on file and submitted to Vic Roads, so they then have a record of your reading (also will have photos of your engine bay, your suspension/brake setup with wheels off, disc thickness, ride height measurement etc).
Cops are cracking down - window tint blitz on St Kilda Rd and Swanston St at end of last year for example, just pulling cars over like a booze bus setup and writing defects for tints on the spot.
Worth keeping in mind.
Off topic: I predict in the very near future, cops will be able to access these images from the Vic roads database from roadside locations - and anything not shown in the images when the car was registered in a RWC state, will be grounds for defect. Fun times ahead.