Tukoroirangi Morgan is criticising members of the Waikato-Tainui executive for proposing to hold a meeting without completing elections of its members
Until Sunday, 12 February Mr Morgan was chair of the executive - known as Te Arataura - but Waikato-Tainui says he was not re-elected.
He is now locked in a dispute with the tribe, saying he gained enough votes to be re-elected onto the executive - and is considering legal action.
Mr Morgan says the new members are not following the rules created by the tribal parliament.
He is calling for elections to be completed by the end of March.
An iwi spokesperson has told Te Manu Korihi that Te Arataura is currently in the hands of a representative appointed by the Maori King.