Each has a generally recognised territory (), but many of these overlap, sometimes completely. This has added a layer of complication to the long-running discussions and court cases about how to resolve historical Treaty claims. The length of coastline emerged as one factor in the final (2004) legislation to allocate fishing-rights in settlement of claims relating to commercial fisheries.
Self-determination can become a prospective vehicle for ideas and ideals of
self-determination and/or . Thus does
Te Pāti Māori mention in the preamble of its constitution "the dreams and aspirations of to achieve self-determination for , and within their own land". Some
Tūhoe envisage self-determination in specifically -oriented terms.
Iwi identity Increasing urbanisation of Māori has led to a situation where a significant percentage do not identify with any particular . The following extract from a 2000
High Court of New Zealand judgment discussing the process of settling fishing rights illustrates some of the issues: ... 81 per cent of Maori now live in urban areas, at least one-third live outside their tribal influence, more than one-quarter do not know their iwi or for some reason do not choose to affiliate with it, at least 70 per cent live outside the traditional tribal territory and these will have difficulties, which in many cases will be severe, in both relating to their tribal heritage and in accessing benefits from the settlement. It is also said that many Maori reject tribal affiliation because of a working-class unemployed attitude, defiance and frustration. Related but less important factors, are that a hapu may belong to more than one iwi, a particular hapu may have belonged to different iwi at different times, the tension caused by the social and economic power moving from the iwi down rather than from the hapu up, and the fact that many iwi do not recognise spouses and adoptees who do not have kinship links. In the 2006 census, 16 per cent of the 643,977 people who claimed Māori ancestry did not know their . Another 11 per cent did not state their , or stated only a general geographic region, or merely gave a name. Initiatives like the Iwi Helpline are trying to make it easier for people to identify their , and the proportion who "don't know" dropped relative to previous censuses.
Pan-tribalism Some established pan-tribal organisations may exert influence across divisions. The
Rātana Church, for example, operates across divisions, and the
Māori King Movement, though principally congregated around
Waikato/
Tainui, aims to transcend some functions in a wider grouping. ==Major iwi==