I have just rung TMR in Queensland. All modifications done before the 30/4/2012 can be done using the old standard as long as you have got the receipt to prove it.
Unfortunately, that might mean that we have to carry our receipts around with us in the car. Ie, if you are going to put any exhaust in, you have got till 30/4 without need a certification.
Macan S Diesel - Carrera White
Macan Turbo - White
1///M - Valencia Orange