A statement from the runanga's Tuhoronuku sub-committee hailed the Government decision, which it said launched a new era of economic prosperity for Ngapuhi and Northland.
Settlement negotiations were expected to begin within the next four months, with the Government wanting the process completed by the end of the year.
Runanga chairman and sub-committee interim chair Raniera (Sonny) Tau said that, with Prime Minister John Key saying in June last year he had seen "poverty beyond belief" in parts of Northland it was incumbent on every Ngapuhi leader to advance settlement without delay.
Ngapuhi would be looking for a bigger settlement than the $170 million which Waikato-Tainui and Ngai Tahu had each received, Mr Tau said.
Last week he said Ngapuhi wanted between $500 million and $600 million in settlement.
Te Kotahitanga co-chairman Pita Tipene said of the more than 3500 submissions the Crown had received on the Tuhoronuku mandate in August last year, 2221, or 63 per cent, had opposed it.
"This is a clear indication Tuhoronuku do not have the majority support of Ngapuhi.
"The Crown is pushing ahead with Tuhoronuku against the will of our people because it will make them look good as they approach the elections at the end of the year."
The ministers had outlined a process for hapu or groupings to withdraw from Tuhoronuku and many had already decided to invoke that option instead of being sucked into the Tuhoronuku regime, Mr Tipene said.
Also, as with all Treaty settlements, any Crown-Tuhoronuku package would need to be ratified by Ngapuhi members before the deed of settlement of signed.
This "final chance to vote down the mandate at the end of the process" was very achievable, Mr Tipene said.
The Government decision was being analysed and the next steps included a possible legal challenge, he said.
