The government may need to provide some air-side accommodation for isolation of aircrew. Non-AirNZ crew would go there for their layovers, AirNZ crew would stay there during a rostered period, then transition to land-side MIQ for 14 days at the end of their rostered period.
It would be grossly inconvenient and inefficient, but would significantly increase the perceived safety
The facility might actually be land-side but deemed to be air-side for this purpose, and managed separately as if it were land-side.