Exemption of intrastate supply of heavy water and nuclear fuels from central GST for specified departmental transfer. Exemption for intrastate supply of heavy water and nuclear fuels in Chapter 28 of the Customs Tariff, when supplied by the Department of Atomic Energy to the Nuclear Power Corporation of India Ltd, from the whole of the central tax leviable under section 9 of the GST Act, effected under powers conferred by section 11 of the GST Act.