An engineering professor says the Government has a mammoth task on its hands if it wants to streamline the Resource Management Act.
An overhaul is being announced on Wednesday, which is expected to tackle a range of issues with the current model.
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But engineering professor John Tookey told The AM Show there are other factors to bear in mind.
"There's a lot of moving parts associated with this," he said.
Tookey believes the Government may be taking a gamble with the timing of the overhaul, being announced by Environment Minister David Parker on Wednesday morning.
Cutting costs might be big a big ask, Tookey said.
"To be brutally honest, I think the Government is taking on a hell of a proposition," he told The AM Show. "Particularly running up to the election which is not that far away."
Parker will make the announcement at 9:30am.