The first in a series of substantive announcements about the current tender for national air ambulance services is expected to be in late September.
The Ministry of Health and ACC's tender process, currently under way, is being described as "a first step towards a 10-year modernisation programme for air ambulances".
The tender process has now moved into formal negotiations with three preferred tenderers across three regions: Northern, Central and Southern.
The negotiations remain confidential until they are concluded.
The Ministry of Health says the negotiations are aimed at ensuring the new services will deliver a nationwide service for all New Zealanders, and be more integrated with road ambulance and hospital services.