A Delhi court on Monday fixed January 30th to consider taking cognisance of the CBI charge sheet filed against Airtel, Vodafone and others for alleged irregularities in allocation of additional spectrum to them during NDA regime.Special CBI judge O P Saini, who earlier had fixed January 14th to consider taking cognisance of the charge sheet filed on December 21st last year, deferred its order on the issue after the CBI submitted that they need over two weeks more to file some more documents before the court.The charge sheet has named three telecom firms — Bharti Cellular Ltd, Hutchison Max Pvt Ltd,now known as Vodafone India Ltd) and Sterling Cellular Ltd,now known as Vodafone Mobile Service Ltd– as accused in the case in which the Department of Telecommunication (DoT) had allegedly allocated additional spectrum resulting in loss of 846 crore rupees to the exchequer.In the charge sheet filed against the three telecom companies, CBI has said that during the pendency of IPO of M/s Bharti Tele-Ventures Ltd, a Bharti Group company, decision in this regard was taken by then erstwhile Telecom Minister Pramod Mahajan, who was not named as accused as he is no more.The charge sheet has also named former Telecom Secretary Shyamal Ghosh as an accused.