Originally Posted by televisor

As far as I could tell during my brief visit to NZ it was actually dependent on plane size: jets (A320 and bigger) had screening, turboprops (ATR72 and smaller) didn't. Admittedly I only observed this at Christchurch and Queenstown, but my acquaintances there confirmed most domestic flights don't have screening (and were surprised when the A320 flight did have screening). Furthermore, the screeners didn't seem to care about liquids (I seem to remember taking my cup of coffee through the WTMD), but that could just be my memory failing.