GST rate notification amendments revise goods classifications, renewable energy devices, bio-diesel, minerals, railway items, and carbonated beverages. Amends the Assam GST goods rate notification to align the State tax schedules with the recommendations of the 45th GST Council meeting. The amendments insert, substitute, and omit specified goods across the 2.5%, 6%, 9%, and 14% schedules, including renewable energy devices, bio-diesel supplied to Oil Marketing Companies, mineral ores and concentrates, printed matter, railway equipment, and carbonated beverages of fruit drink or with fruit juice. The notification is stated to have effect from 1 October 2021.