DIRD PAX figures for 2017 calendar year 509579 passengers <https://bitre.gov.au/publications/ongoing/airport_traffic_data.aspx>
Latest Australian Airspace Policy Statement 2015 states ATC should be introduced at 91,000 total movements, or 15,000 PTO or 350,000 Pax
Table 1. Airspace Criteria Thresholds
Class B
Class C
Class D
Service provided
ATC
ATC
ATC
Total annual aircraft movements
750,000
400,000
80,000
Total annual PTO aircraft movements
250,000
30,000
15,000
Total annual PTO passengers
25 million
1 million
350,000