Federal Minister for Finance and Economic Affairs, Senator Shaukat Tareen on Friday said a sub committee has been constituted to determine the new formula of the Gas Development Surchagre. Talking to media men after a meeting here Tareen said the committee comprises of the technical experts of the four provinces, Secretary Ministry of Petroleum and Chairman OGRA. Tareen said that Balochistan has demanded Rs 300 billion with regard to the GDS.