Substitution of notified goods: Fly ash bricks, fly ash aggregates and blocks specified; amendment effective retrospectively. Amendment substitutes, against serial number 4 in the notification table, the entry in column (3) with 'Fly ash bricks; Fly ash aggregates; Fly ash blocks'. The Governor, on the Council's recommendation and under the Assam GST Act, issues the amendment through the Finance (Taxation) Department, and the notification is deemed to have come into force from 18th July, 2022.