A Waitangi Tribunal hearing gets under way on Monday, which could delay the partial sale of state-owned assets.
Legislation giving the green light to the partial privatisation of four state-owned energy companies was passed by parliament late last month.
However, the Maori Council will ask the Waitangi Tribunal, at an urgent hearing at Waiwhetu Marae in Lower Hutt, to recommend that the Government delay the sale of shares in the companies.
The Maori Council says the partial privatisation program shouldn't go ahead until historical claims have been settled, Radio New Zealand reports.
It says the Government is selling shares on the basis that the right to use water is free, however, Maori say it's not.
The Crown has opposed the urgent hearing and says any claims by Maori to water and geothermal resources wouldn't be compromised by the partial privatisation of the power companies.
The first part of the hearing is expected to run until early next week.
NZN