The Maori Party has chosen lawyer Rahui Katene to stand in Te Tai Tonga.
In February Ms Katene missed out to chosen candidate Monte Ohia but selections opened again after his death last month.
The other two nominees were Georgina Haremate-Crawford (Gina) and Hector Matthews.
Te Tai Tonga electorate council co-chairman Raymond Hina said Ms Rahui would be "an excellent representative" for the largest electorate in the country.
Te Tai Tonga covers the South Island, Rakiura (Stewart Island), the Chatham Islands, Wellington and parts of the Hutt Valley.
"Rahui has had extensive experience working in Te Tau Ihu, as a lawyer, Treaty claims consultant, and former claims manager for Crown Forestry Rental Trust," Mr Hina said.
Ms Katene is the daughter of activist John Hippolite.
Maori Party co-leader said the selection was demanding considering the loss of Mr Ohia.
Should MPs be able to swear to uphold the principles of the Treaty?Related story: Oath wording strikes MP discord