Democracy Action chairman Lee Short said if Kahungunu ki Wairarapa and Rangitane o Wairarapa wanted to influence the direction of council, "they should have had their representatives stand for elected office".
"It is imperative our system of government is democratic, and that each of us is equal under the law."
Last year, New Plymouth said no to a Maori ward in a landslide vote after a binding referendum, when 83 per cent voted against it.
New Plymouth mayor Andrew Judd, who championed the idea, said he believed legislation victimised Maori and was stuck in the 1840s.
This month Mr Judd said he would not stand for re-election, as he had been abused, including being spat at, for supporting a Maori ward.