A South Island iwi is labelling the Treaty Principles Bill naive, politically clumsy, and unproductive for New Zealand

The controversial Bill is set to be drafted and Cabinet will consider it before it's introduced to Parliament later this year.

Prime Minister Chris Luxon's declared he won't support the Bill past first reading.

Te Runanga o Ngai Tahu Kaiwhakahaere Justin Tipa says this would not be a minor policy change.

He says this bill tells people Maori don't hold a unique place in this country or its history.