Te Ture Whenua Māori Act 1993, s 240
The court can remove trustees if they have lost the capacity to perform the role.
The court can also remove trustees if removing them would be best for the running of the trust, and if one or more of the following things is true:
there have been repeated failures or refusals to act as a trustee
the trustee has become an undischarged bankrupt, or
the trustee’s behaviour or circumstances are no longer suitable.