However in NSW it's no tinting on the "main" part of the front window (refer
http://www.rta.nsw.gov.au/registration/downloads/vsi03.pdf):
What to remember when tinting vehicle windows - Passenger vehicles
Tinted films are not allowed on the main part of the windscreen. A tinted band across the top of the windscreen is permitted providing it is above the portion of the windscreen swept by the wipers or its depth is no more than 10% of the depth of the windscreen. Window tinting is allowed on side and rear windows however, the vehicle tint industry and road safety experts agree that tint darker than 35% visible light transmission (VLT)(1) is undesirable for passenger type vehicles. Since 1 August 1994, the NSW Motor Traffic Regulations have required that newly tinted side and rear windows maintain a VLT of at least 35%.
Safety Check stations which issue “Pink Slips” will check the level of VLT on your vehicle windows.
If you now apply tint which is less than 35% VLT to your vehicle you are breaking the law.
If a tint less than 35% VLT is replaced on a vehicle, the new tint must allow a minimum of 35% VLT.
Tinted film must not be reflective or mirror like as it can dazzle other drivers by reflecting sunlight or headlight beams.
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Sorry for the tangent off the topic but just wanted to clarify this for NSW rego vehicles as I had to look into this recently.
[Edited on 13-5-2003 by KOM123]