Te Pāti Māori's extraordinary display of protest - interrupting the first vote on the Treaty Principles Bill - has highlighted the tension between Māori tikanga, or customs, and the rules of Parliament. The suspension of Parliament over a haka and the national hīkoi by thousands of people are garnering international headlines.

A group of MPs in New Zealand performed a haka, a traditional Māori performance, in Parliament on Thursday to express opposition to a proposed law that seeks to redefine a treaty between the Crown and Indigenous people.