Controversy had erupted over the allocation after CBI registered an FIR against Birla and Parakh last week.
CBI sources said the only material change that took place between rejection of Hindalco's application during 25th screening committee and allotment were two letters routed to Parakh through the PMO and his personal meeting with Kumar Mangalam Birla, Chairman of Aditya Birla Group.
“To imply that our Chairman, Mr. Kumar Mangalam Birla, managed to overturn the decision of the Screening Committee, is preposterous,” a statement from Hindalco had said refuting the allegations levelled in the CBI FIR.