The circuit may be compliant, but that doesn't mean that it's safe in the views of the drivers, teams and organisers.
The North Island circuits typically have two, three or four rows of tyres then an earth embankment on every corner. Timaru however only one or two for the most part.
For reference:
https://www.youtube.com/watch?v=FI8OJrsffMY
https://www.youtube.com/watch?v=IBgtec7awEE
https://www.youtube.com/watch?v=FI8OJrsffMY
You can't tell me that's safe?