Te Rūnanga o Ngāi Tahu Ngāi Tahu are the iwi comprised of Ngāi Tahu whānui; that is, the collective of the individuals who descend from the five primary hapū of Ngāi Tahu, Ngāti Māmoe and Waitaha, namely Kāti Kurī, Ngāti Irakehu, Kāti Huirapa, Ngāi Tūāhuriri and Ngāi Te Ruahikihiki. Te Rūnanga o Ngāi Tahu was established by the Te Rūnanga o Ngāi Tahu Act 1996 and services the tribe's statutory rights and ensures that the benefits of the Settlement are enjoyed by Ngāi Tahu whānui now and in the future. Throughout the South Island there are 18 local rūnanga. An elected representative from each of rūnanga makes up Te Rūnanga o Ngāi Tahu, the governing body overseeing the tribe's activities.