I have a simple proposal to the problem of Taniwha popping up every time there’s a new project going.
A Taniwha register.
Just like treaty claims, Maori tribes have a year (or even 2) to research and document Taniwha in their area and report them to Land Information or whatever government department is given the job of maintaining the list.
As an added bonus, we could have as part of the database any potentially expensive Taniwha allergies, such as motorways, cellphone towers etc as well as the appropriate cure (denoted in NZD).
I’d certainly head off a lot of trouble in the long run.