MikeB4: It is a three lane road as described in the Road Code both ways can use the centre land as described in the code
No it isn't. The person doing the overtaking in the passing lane has unrestricted access to that lane.
This is actually a two-way roadway marked in 2 or more lanes (not a two-way roadway marked in 3 lanes). The difference is that this road has a centre line (the one with the yellow line).
The roadcode is just a sometimes dodgy interpretation of the Land Transport (Road User) Rule 2004. It has no legal standing whatsoever.
New Zealand's insistence of having the same markings for centre lines and same direction lanes doesn't help of course