"We will be at the Environment Court in September, our genealogy is directly linked to those people, they will speak on our behalf regarding the removal of that vessel."
Ngai Te Rangi iwi chairman Charlie Tawhiao said iwi and hapu within the Bay of Plenty unanimously supported the Rena being removed from the reef until about a year ago.
They would continue to oppose the plan.
Collective meetings were held within the Te Moana a Toi Iwi Leaders Forum, he said.
"Which was formed in response, as a collective, to the Rena crisis and all through it's existence it was very clear the Rena needed to be removed and that was conveyed to the owners and insurers every time they came to see us."
Mr Tawhiao said the group had stopped meeting when different iwi began to voice different opinions.
"There were factions within it who were starting to question that principal or position and rather than risk all out war, that group went into abeyance."
There was no subsequent decision by that group but the group also operated on the basis that constituent members had to make their own calls.
Ngati Ranginui Iwi members did not return calls to the Bay of Plenty Times yesterday.
Iwi's growth
According to the NZ Statistics' 2013 Census on Ngati Ranginui Iwi, 8967 people, or 1.3 per cent of the total population of Maori descent, belong to Ngati Ranginui Iwi, an increase from 7644 people from the last census conducted in 2006
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