Ngāti Porou, Ngāi Tūhoe, Ngāti Kahungunu
I tohua a Kaiwhakawā Wilson Isaac ki te Kooti Whenua Māori i te 11 o Maehe 1994, ā, i tohua hei Kaiwhakawā Matua Tuarua nō te Kooti Whenua Māori i te tau 1999, hei Kaiwhakawā Matua nō te Kooti Whenua Māori i te 13 o Ākuhata 2009. Ko ia tētahi Kaiwhakawā mō Te Rohe o Te Tairāwhiti mō te Kooti Whenua Māori. He Kaiwhakawā anō ia nō te Kōti Teitei o Niue me te Kōti Teitei o Ngā Kuki Airani. I te rā toru tekau o Apireira rua mano rua tekau ma toru i whakanuia e Kaiwhakawā Isaac i tōna huringa tau whitu tekau me te whakatutuki ai i tana wārati hei Kaiwhakawā Matua o te Kooti me te Heamana o Te Rōpū Whakamana i Te Tiriti.
Ko Kaiwhakawā Wilson Isaac i whakahaere te Uiui mō Mōhaka ki Ahuriri, te Uiui mō Te Taha Whakararo o Te Waipounamu me te Uiui mō te Takiwā Pāka ā-Motu, Te Uiui mō Ngā Rawa Wai Māori me Ngā Uiui mō te Pūrongo Ratonga Hōhipera me te Hauora o Ahuriri. Ko ia te āpiha whakahaere mō te Uiui mō Ngā Ika-a-Whiro Māori me te Uiui a Te Rōpū Whakamana i Te Tiriti o Waitangi ki te Toenga o Ngā Kerēme Tawhito.