I don't know for sure what happened, although I have my suspicions, but the list of airports that will be regulated under the new regime jumped from 28 to 57 late last year. Birdsville originally off now included. A lot of other airports also served by the same operator were also off the list and now are back on.
What point am I trying to make? Well you could have all been airside and not had a single ASIC amongst you. Someone, not the department, didn't like that idea.