An extra day is needed for an urgency hearing into the Crown's recognition of the Ngatiwai Trust Board's mandate after time ran out during this week's three-day hearing.

Hundreds of people filled Whangarei's Toll Stadium this week for the Waitangi Tribunal urgency hearing into the Crown's recognition of the Ngatiwai Trust Board's deed of mandate to negotiate Treaty claims on behalf of iwi.

Claimant Huhana Lyndon, who was one of many cross-examined by the Crown at the hearings, said it went "really well".

"We talked about the ongoing concerns, the lack of hapu voice, there was dialogue about what hapu rangatiratanga means. It was great," she said.

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The Crown and Ngatiwai Trust Board selected who they wanted to cross examine, and the claimants selected who they wanted to cross examine from the Crown and trust board.

Ms Lyndon said Emily Owen, from the Crown, and Haydn Edmonds, chairman of the trust board, were the only two who were cross-examined by claimant lawyers during the hearing due to time running out.

Four more people still needed to be cross-examined so another day of hearings would be held, Ms Lyndon said.

A date for the extra day of urgency hearings is yet to be confirmed but Ms Lyndon said it may be held in Wellington.

After the hearings are finished the Waitangi Tribunal will issue a report with their findings.