Economy Home grown Tejas aircraft given final operational clearance Updated : February 20, 2019 10:59 PM IST The formal declaration of FOC of the aircraft was made by the Secretary Defence R&D and Chairman, Defence Research and Development Organisation, G Satheesh Reddy. The RSD provides the capabilities, features and technologies that FOC standard Aircraft will have on induction into the IAF, it said. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.