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Finance and expenditure select committee chairman Shane Jones is hoping the Telecommunications Amendment Bill splitting Telecom into three divisions will be passed by the end of the year.
Once the bill becomes law, Telecom has 20 days to draw up a plan to separate the company.
Communications Minister David Cunliffe will invite public submissions on the plan, which could be further amended, and then has the power to approve or decline the plan.
Telecom group general counsel Mark Verbeist said it would be six to eight months for the naked DSL price to be finalised.
Telecom has said that no specific timeframe for the split had been drawn up because the bill had not been passed and there was still a lot of detail to work through.
But in September, the company set up working parties with its rivals after announcing that it was voluntarily splitting its wholesale and retail operations.
Tony Baldwin, who is chairing the working parties on behalf of the Telecommunications Carriers' Forum, said the technical details of how competitors would gain access to Telecom's exchanges would be finalised by December 15.