He said he hoped the board would be operational and ready for its first meeting in February.
"Ideally, we'd like to hold elections late this year.
"We are very clear that the implementation has to mirror what was endorsed by the iwi and we have no intention to make any changes. We have built up a lot of trust with many people and we do not want to jeopardise that."
Mr Tahana said a number of hui-a-iwi (tribal meetings) had been planned and he was working with the council to form a communications plan to keep the rest of Rotorua informed.
The council's strategy and partnerships group manager Jean-Paul Gaston said the council was looking forward to the new board being established "so we can give full effect to the decision the council has recently taken around a new partnership with Te Arawa".
"Council staff are assisting the project team," he said.
The Rotorua Pro-Democracy Society, which was initially set up to oppose the board model presented to council, has not decided whether it will legally challenge the decision. It is meeting next week to discuss the issue, among other things.
Society secretary Reynold Macpherson said the board could alienate more than just mataawaka (non-Te Arawa Maori) and the non-Maori majority living in Rotorua.
"Will the 'partnership' even survive? The promises made by the mayor have already been cut or stalled by over half due to resistance in the wider community," Mr Macpherson said.