NSW registration renewal missed and car is in VIC

[ams77]

Hi all,
I'm in Vic but have a query re NSW registration. my soon to be daughter in law has borrowed her dad's car that was registered in NSW (under pensioner discount) and did not realize that the reg expired on 31 Aug 14. Her parents also didn't realize. Now I know cars in NSW need yearly inspections to get reg renewal but how do we do it now for this car that is in Vic presently?
I assume it needs to be driven to NSW to be checked & I know there is a 3 month grace period before the reg is actually cancelled like there is in Vic.
My questions I suppose are:
1. can the car be checked in Vic and recognized by NSW Roads?
2. does the car need to be checked in NSW therefore needs to be driven back there?
3. if needs to be done in NSW, can it be driven considering the registration officially expired on 31 Aug 2014?
Aasuming the answer to 1 is no, and to 2 is yes and 3 is no, does that mean the car needs some sort of temporary registration to actually drive it from Vic to Wagga Wagga?
If anyone knows the answer appreciate your comments.
thanks