The whole thing at country airports is and will continue to be a sham, councils can't afford to security fence whole airports.
It was a knee jerk reaction to a threat that was not present in an effort to mollify the public.
Initial funding was given directly to councils via a grant scheme which has dried up so there is no more "capital" (fencing) works in progress anywhere.
The rapid reaction force is at best about the level of the S.E.S and really a do gooder exercise.
How anyone could believe a 4 hour reaction time from a capital city to an outpost like Birdsville following a threat report is in any way effective is quite bizarre.