Not to sure about that.Im a car salesman and i traded a car on xmas eve last year and it revs check reviled it was in a accident in 2010 and we did not trade in as we could not register it in NSW and the VIV was done in 2011 in nsw.
It had nsw rego and at the time of the accident it was re registered in QLD in 2014.
I know laws changed in 2011 for nsw and any VIV done after june 2011 anywhere in AUS you could not register the car in NSW.
Ill upload the revs shortly anyway as iv already done one at work.. just got to get home and take a picture of it to upload
Edit
http://www.sydneyautoinspections.com.au/buying-a-write-off/4550399056
This link will state that you cant even re register a car after January 2011.. not june like i stated..
Im still abit unsure of the repairable write off part cause our wholesaler at work still sells them in QLD however he has to state its a repairable writeoff and obviously a large discount lol