Mat:
No or minimal security at airports served by a/c carrying < 90 pax (stand to be corrected on actual number). It's even been possible to fly WN-CH in an ATR72 and not be 'scanned' before boarding. Pax are currently streamed to either non-screened or 'sterile' areas depending on type (seating capacity) of a/c at larger airports; straight through at smaller airports.
I recently travelled on a CH-WN ATR flight and discovered at my destination I was accidentally carrying a boxcutter knife in the bottom of my carry-on briefcase.
I daresay as a result of today's incident the cost of flying internally in NZ will now increase as all airports instigate full security measures for all a/c. That might get interesting in places like Gisborne or Hokitika where, just for starters, security fences will need to be installed. Armed guards at Canterbury Aero Club perhaps? Hmmm...
The knee-jerk reaction should be forthcoming shortly.
Le Vieux