This varies and depends on a number of factors:
1. How long you have had your license.
2. How current you are, when you last flew.
3. How many hours you have.
4. Do the hours accurately represent your actual flying ability.
5. Whether or not you personally feel you meet the standard CTC want without needing remedial training.
You are given the chance to request a shorter course before you leave for NZ. The head of training puts in the request and you are then assessed by an instructor over a number of lessons when you arrive in NZ. If you are at the level you say/your hours represent then you will cut out the lessons that you do not need.