The Government says for Moriori and Maori to complete their Treaty settlements over the Chathams, both groups need to work together for the benefit of the whole community.
Treaty Negotiations Minister Christopher Finlayson toured the island last week and spoke with the two groups about advancing their Treaty settlements.
He says there have been too many factions including government legislation such as Labour's Foreshore and Seabed Act which have stalled development.
Mr Finlayson says Chatham Islanders need to unite and move forward together.
He says divisions are not going to help to get a good settlement on the island and both Moriori and Ngati Mutunga need to work through their issues and lament the past.
Mr Finlayson says he is aiming for a whole island settlement because most of the people on the Chathams are both Ngati Mutunga and Moriori and they can't deny either of their whakapapa or genealogy.