GST exemption for RCS UDAN VGF begins from each airport's notified commencement, enabling three year fiscal relief. The notification fixes the temporal trigger for two fiscal concessions under RCS-UDAN: VGF disbursed to Selected Airline Operators is exempt from GST for three years from the notified commencement of RCS UDAN operations at each airport, and a 2% excise duty on Aviation Turbine Fuel used for RCS-UDAN flights applies for three years from each airport's notified commencement date; a schedule of airports, routes and their commencement dates is published to determine those three year windows.