The results went before the governance group which is chaired by the Environment Minister, at a meeting in March, and the steering group at an April meeting. Both groups signed off on a decision to reduce resourcing levels, he said.
Mr Fraser said while iwi liaison roles had been disestablished there was still iwi representatives on the governance group, which met once a year, and the steering group. He was also required to keep in regular contact with iwi.
"I can understand local iwi reaction but there was a consultation process followed and under the review there were a number of changes, including my role and hours being reduced."
Te Moana A Toi Iwi Leaders Forum representatives are drafting a letter to Environment Minister Amy Adams outlining their concerns.
Forum chairman Te Awanui Black, who also co-chairs the governance group, said the decision to disestablish the iwi liaison roles essentially came without warning.
Mr Black said the decision had taken away the infrastructure necessary to allow iwi to continue working towards the ultimate recovery goal.
"We are putting the Minister on notice that we want her and the government to hold to our original agreement, which was that iwi would be 100 per cent part of any Rena recovery movement, and not just expected to be watching from the sidelines," he said. "At the end of the day, like anything, if you want to fix something you have to be there and you can't fix something unless you are fully part of the plan."
Mr Black said he would have been happy to talk about a reduction in the iwi liaison positions but to scrap all the roles without warning was unfair.