It's a crock. Go take a wander around almost any major Australian airports GA area. You will see all and sundry coming and going, wandering airside, no ASICs or VIC's and often with no 'ASIC holder' in close proximity. Then you have dodgy fences easily breached, fences with crap stacked up against them or trees growing through them.
My point. The system simply isn't secure, yet talk to the airport operators and they will tell you that the clowns from the OTS want you to show them how you have risk assessed threats from bio terrorism and MANPADS (don't laugh), at Townsville or Broome airport!!! Yeah right, as if