The Government said it would prefer to auction the spectrum for third generation mobile phone services, (3G), at a time when it can earn maximum revenue. Cabinet Secretary K M Chandrasekhar said there was no definite timing for the auction. Mr. Chandrasekhar is heading the high-level committee to monitor vacation of spectrum by the defence forces. The empowered Group of ministers, headed by finance minister Pranab Mukherjee had made a provision for garnering up to 35,000 crore rupees from the sale of airwaves in the current fiscal.