Chandrasekhar maintained that Tata's telecom companies had benefited from the government's allocation decisions by becoming a dual (GSM and CDMA) technology license holder, and that its defense of the process was motivated by this.
The BJP has been criticized for shifting to a revenue-sharing regime rather than an annual license fee, and making other regulatory changes that may have favored particular telecom companies, Telegraph India said.
The 2008 allocation of 2G spectrum used rates set in 2001, in a decision state auditors allege could have cost the government up to 1.76 trillion rupees ($38.4 billion). The BJP has been one of the most vocal critics of the decision.
Sibal's predecessor A Raja - who is accused of ignoring advice to conduct the allocation through an auction - was forced to resign last month, and the CBI raided his homes yesterday as part of the investigation.
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