There is no connection between an aoc and an eba.
It has the potential to get untidy but there is no barrier to qf paying the nz guys exactly what they are paying them now to fly the vh tailed 73’s.
There is nothing from a (casa) regulatory perspective, once everyone is checked into the qf system (under the qf aoc), stopping a jetconnect first officer for example jumping into a jet with a qf skipper and doing a perth return (or vice versa).
The thing stopping that “operationally convenient” but industrially untidy behaviour is the eba.
Not saying it wont cause a huge ****fight because once the nz guys/gals are checked into the qf training and checking system they are for all intents and purposes qf pilots (from a licencing/regulatory perspective, not industrially)