The order came in the backdrop of the finding of Petroleum and Natural Gas Regulatory Board (PNGRB) that the PSU had indulged in unfair trade practices in the past.
PNGRB had, in December last year, held GAIL guilty of indulging in "restrictive trade practice by insisting on high gas transportation charges" from Gujarat State Petroleum Corp Ltd for use of its pipelines from Dahej LNG terminal.
GAIL was also asked by PNGRB to pay a fine of Rs 1, 00,000 and the Appellate Tribunal for Electricity had upheld the order and the penalty.
The counsel for GAIL sought an order from a bench, headed by Justice J Chelameswar, that it be allowed to take part in the bidding process.
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The apex court allowed GAIL's plea observing that both GAIL and Gujarat State Petroleum Corp were government-owned companies and barring the PSU from participating in the project would only benefit private companies.