St John is requesting extra paid staff to be employed in Dunedin, where there's concern about the use of single-crewed ambulances.
The government's reportedly reviewing allocations for St John employees throughout the country.
In Dunedin there are 40 paid staff and 60 volunteers.
They're supported by another six workers and 16 volunteers in Mosgiel.
Growing demand for services means St John sometimes has to resort to sending a single-crewed ambulance to jobs at night.
That happens when all available staff and volunteers have already worked 14 hours within a 24 hour period.
It's not known when the government will make a decision on funding.