The bench also took note that there are cases in which senior officials of the CBI have overruled the investigating officers after the preliminary enquiry on the issue of filing the regular cases and charge sheets.
It directed the CBI to place files relating to all preliminary enquires before the CVC for getting the report of the two vigilance commissioner within six weeks.
Chief Vigilence Commissioner Pradeep Kumar is not handling the coal block allocation scam as he was once with the Coal Ministry.
The bench, also comprising justices M B Lokur and Kurian Joseph, said it will later look into the issue of regular cases in which the CBI has expressed reservation for CVC opinion.