New Delhi, Sep 18 - The Anil Ambani group Friday asked the Supreme Court to dismiss a government petition that questions the validity of its contract with Mukesh Ambani-led Reliance Industries for natural gas supplies from the Krishna-Godavari basin.

The petition, filed by group company Reliance Natural Resources, says the government's argument that Reliance Industries cannot sell gas to any party without a prior state approval is not maintainable.

'The production-sharing contract gives marketing freedom to the contractor. This is established from the plain reading of the production-sharing contract and the answers given by the government in parliament,' said the petition.

The company further said its contract with Reliance Industries was part of a corporate restructuring plan -- the one between the two Ambani brothers, Anil and Mukesh -- over which the government had no role to play.

'In this reorganization of the business of Reliance Industries, the government has no locus to intervene,' the petition said, staking claim to 28 million units of gas a day at $2.34 per unit for 17 years, based on its contract.

'The gas supply arrangement provided by the memorandum of understanding is like any other commercial gas supply arrangement made by a contractor for sale of gas that would come to its share as per the provisions of production-sharing contract.