For some insight into the trigger criteria used to establish the RFFS at Ballina, and the history of the criteria, see the discussion paper here
https://infrastructure.gov.au/aviation/arffs/index.aspx. Aviation Rescue and Fire Fighting Services (ARFFS) Regulatory Policy Review
For the new criteria, see the report at the bottom of the page.
The latest airspace review for Ballina (2017) is here
https://www.casa.gov.au/files/ballin...lysisreportpdf
Never let the facts get in the way of a good rant!