The review puts on hold scheduled changes to Fonterra's enabling legislation to allow a broader review of the dairy sector and whether it is adding enough value to the country's biggest export commodity, said O'Connor. The Act deregulated the export dairy industry.
The previous government had legislation ready to amend the Act that would have retained easy entry and exit for Fonterra's cooperative farmer-owners but gave the company a choice whether to accept new milk and provide regulated price milk to competitors.
The proposed changes followed a Commerce Commission review after Fonterra's share of South Island milk fell below a DIRA threshold. The competition watchdog concluded Fonterra's market dominance still warranted regulation.
O'Connor intends introducing legislation this year to amend DIRA and prevent some provisions of the Act expiring in the South Island on May 31.
He hopes the new review, to be led by the Ministry for Primary Industries, will be completed within 12 months.
"I think there will be enough information and enough opinions around the country and internationally now to conduct a really useful process," he said.
The country's second biggest dairy manufacturer and exporter Open Country said it was considering its position in regards to the new review.
"Clearly we have views on some aspects but they have yet to be formalised. We would expect to make a submission," said chairman Laurie Margrain. Privately owned Open Country collects around 7 per cent of the country's raw milk.