NEW DELHI:The appointments committee of the Cabinet approved Ram Sewak Sharma, currently the IT secretary selection as chairman of the Telecom Regulatory Authority of India for three years or until further orders, whichever is earlier, the government said in a notification Monday. The post had been lying vacant since Rahul Khullar retired in mid-May. It wasn’t immediately clear when Sharma, a 1978 batch Indian Administrative Service officer of Jharkhand cadre, would take charge of TRAI. Khullar had resigned as commerce secretary to take the top job at the regulator.