Ok here is some more specific information, and this applies to Qld where this seems to be escalating.
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The following information provides some general guidance about raising a vehicle’s height
Without ESC-
A vehicle lift up to and including 75mm combining both suspension lift and tyre diameter increase (maximum suspension lift 50mm, maximum tyre diameter increase 50mm) is acceptable under self-certification.
A vehicle lift between 76mm and 125mm inclusive, combining a suspension lift, a tyre diameter increase and a body lift (maximum suspension lift 50mm, maximum tyre diameter increase 50mm, maximum body lift 50mm) requires certification and testing by an Approved Person.
With ESC-
A suspension lift up to and including 50mm is acceptable under self-certification. A vehicle lift over 50 mm or due to a combination of any other lift (tyres, or body blocks) requires certification and testing by an Approved Person.
Please Note: The above mentioned maximum tyre diameter tyre increase is for 4WD off-road vehicles. A passenger car or passenger car derivatives must not increase their tyre diameter by more than 15mm.
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Hope that clears things up.