Green Party co-leader Russel Norman says it would be a mistake for the Government to work with the Canterbury Regional Council on consent applications for intensive dairy farms in the Upper Waitaki.
Dr Norman says the party would prefer the Government take complete control.
Environment Minister Nick Smith wants to appoint a project co-ordinator from the Environmental Protection Authority to help the regional council manage the hearings process.
The council is to consider applications for farms where about 18,000 head of cattle would be kept inside for much of the year.
Dr Norman believes Dr Smith could have used wider powers and taken over the hearings, giving the Government the right to veto the applications.