The Special Flight Authorisation is because the aircraft doesn't have a valid CofA due to outstanding Maintenance, but the Aircraft itself has been checked out as Airworthy for the purposes of just little old me taking the risk of a Ferry Flight!
Thanks for the Reference SWH, not sure how I missed this, must be me misinterpreting AIP Gen 1.8, my by reading 1.8.2 says that an aircraft from a contracting state is able to come and go as they please so long as it's a Private Flight.
Basically we need a letter from CASA saying they recognise the Special Flight Authorisation from our own which covers the lack of a CofA, hopefully they won't take long on that!
And No, it's not one of Clives MD82s