The move seen as a step towards energy sector reforms will allow private companies to bid for captive use and allot mines directly to state and central public sector undertakings.
"The President has signed the ordinance," said his Press Secretary Venu Rajamony here.
The Cabinet, chaired by Prime Minister Narendra Modi, last evening recommended to the President promulgation of ordinance in order to resolve the pending issues particularly the situation arising out of the Supreme Court judgement quashing the allocation of the coal blocks.
Government will put sufficient coal blocks on e-auction for the private sector players who are into the cement, steel and power sectors.
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Union Finance Minister Arun Jaitley had said last evening that the e-auction process will be "transparent" and completed in "three to four months" with proceeds going entirely to the state governments where the mines are located.
The biggest beneficiaries would be the eastern states like Jharkhand, Odisha, West Bengal and Chhattisgarh. States like Madhya Pradesh, Maharashtra and Andhra Pradesh would also benefit.
The coal blocks, which were earlier allocated through a screening committee mechanism, became a political issue after Comptroller and Auditor General (CAG) alleged arbitrariness and absence of any criteria in the screening process and pegged notional loss to the exchequer at Rs 1.86 lakh crore.
The apex court had last month quashed allocation of 214 out of 218 coal blocks alloted to various companies since 1993, terming the method as "fatally flawed".