The Law and Reality
http://www.snakeracing.com.au/disclaimer.html
You will find this disclamer with or on the packaging of most aftermarket or performance parts sold in Australia. That way the seller $$$ does not need to have parts certified to match or better manufactures specks, Thus the Policeman knows your performance parts are in breach, as just knowing there better, does not make it so.
In Tasie its a no no,
In Qld. its a go, go