New Zealand First and ACT are opposing an Auckland Council plan for the Waitākere Ranges.
The council wants to set up a committee including iwi, the Crown and Auckland Council.
NZ First MP Shane Jones says it could easily morph into co-governance and ACT leader David Seymour claims it could let unelected decision-makers close tracks and dictate land use.
NZ Herald political editor Thomas Coughlan says the ball's in National's court on this matter.
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