Make a big noise politically about and you can quite legally fly around Australia on a ZK rego. Vincient did it for years including RPT.
NZ are currently doing on there SYD-NLK & BNE-NLK services, which are funded by the Australian government!
It isn't really much different to Eastern Australian Airlines flying there Q300s around New Zealand with an VH on the back of the plane.
Could it even tempt Qantas to move all the Q300s over to ZK?