Concessional excise duty for aviation turbine fuel from regional connectivity scheme airports introduced with time-limited applicability. Imposes a concessional basic excise duty rate on Aviation Turbine Fuel drawn by operators or cargo operators from Regional Connectivity Scheme airports by substituting the serial entry for the relevant tariff heading and inserts a proviso limiting the notification's application to that entry after a specified date; issued under the Central Government's statutory amendment powers and linked to prior amendments to the principal notification.