Tanenuiarangi Manawatu Incorporated ("TMI") has been the mandated iwi authority for Rangitaane O Manawatu since 1989. Its members are the natural desendants of the hapu of Rangitaane O Manawatu.

These hapu include:

Ngati Hineaute - Palmerston North District
Te Rangitepaia - Manawatu/Horowhenua District
Te Rangiaranaki - Palmerston North/Horowhenua District
Ngati Mairehau - Manawatu/Horowhenua District
Te Rangitauira - Manawatu/Rangitikei District
Ngati Te Kapuarangi ki Manawatu – Manawatu