Mr Finlayson said he expected Tuhoronuku to make decisions necessary to enable major opposing groups to participate through Tuhoronuku, even if this resulted in a change in the current membership.
Mr Sadler said all trustees were committed to achieving Ngapuhi unity and since the meeting he was satisfied issues raised by Mr Finlayson had been or were in the process of being addressed. Mr Finlayson also said he was "deeply concerned" the board had borrowed more than $500,000 from the Ngapuhi Runanga as at June 30, 2015.
"A principal purpose of the changes made prior to mandate recognition was to ensure the independence of the Tuhoronuku IMA from the Runanga. Yet the Board, under Mr [Sonny] Tau's leadership appears to have allowed precisely the opposite to occur, namely a high level of financial dependency."
Mr Tau, the former chairman of the group and chairman of the Ngapuhi Runanga, did not wish to comment. Mr Sadler said it was necessary to utilise alternative funding to support the settlement process but would not be utilising further Runanga funding.
Mr Finlayson said Tuhoronuku should not make funding commitments going beyond the end of this year.
"As I have said on previous occasions, the Tuhoronuku IMA will not be underfunded in this negotiation provided I am confident it is on a path to settlement based on good planning and budgeting."
In a statement Tuhoronuku said a project team would work with the Office of Treaty Settlements on financial planning and budgets.
"A number of work streams are under way, to provide prudent financial planning and ensure the entity is not exposed to budget risks."
Mr Finlayson had no further comment to make at this time.