The Commerce Commission's reviews of its decisions on the pricing of access to Chorus' copper wires could take as long as two-and-a-half years.
That's despite the regulator's rulings on Chorus' copper network and broadband access coming into effect in December 2014.
The decisions were based on benchmarking against other similar countries and the reviews will determine the actual costs involved.
A year ago the commission set a $23.52 a month wholesale price on access to Chorus' copper wires and last month it set a $10.92 price on broadband access.
General manager of the commission's regulation branch John Hammill says the commission will look at combining the reviews of both pricing decisions.
He says the commission is consulting with stakeholders in the process before finalising the timeframe.
"In overseas jurisdictions it can take over two, two-and-a-half years to deliver a full cost model, but we're interested in people's views as to whether there are any options for reducing the time launch that might be able to be done and the kinds of issues that might help us to do that."
Mr Hammill says if the reviews take longer, these prices will stand from December next year and one of the issues the commission will consider is whether the prices emerging from the reviews will be backdated.
It is the first time such reviews have been conducted in New Zealand.
