The Coal Ministry, which earlier sought the report on the coal blocks from the companies, is now insisting on affidavits so that they could be placed before the apex court.
The companies which have been asked to submit the affidavit include Jindal Steel and Power Ltd (JSPL), Hindalco, Jayaswal Neco, SAIL, NTPC and Gujarat Mineral Development Corp (GMDC).
"I am directed to request you to furnish an affidavit... confirming that the information supplied by you...Is true and correct; to the Ministry of Coal by September 4," the ministry said to allotees of 40 producing coal blocks and six coal blocks which may become operational in FY'15.
The government had earlier told the Supreme Court, which is looking into the allocation of mines, that it "wants re-auction of all 218 coal blocks", while seeking its indulgence to "exempt" 40 of them which are functional and ready for the end use power plants.
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The Ministry had earlier sought details like date of allotment of mines, date of grant of mining lease, coal production in the last fiscal, coal production since commencement of mining, details of linked end use plant and investment in the coal block.
Attorney General Mukul Rohatgi had on Monday told the Court that "Government stands by the August 25 judgement. We want re-auction of 218 coal blocks. We will be happy if we save some 40 of them which are functional or operational and ready for end use plant."
He had said there was a need for saving 40 coal blocks from "guillotine of cancellation" as uncertainty of coal availability would affect the plants, when the country is facing acute shortage of power supply.