Composition levy under GST: amendment expands eligible items to include fly ash bricks, aggregates and blocks, effective retrospectively. Amendment under the proviso to section 10(1) substitutes, against serial number 4 in the TABLE of Notification No. S.O.39/P.A.5/2017/S.10/2019, the entry in column (3) with 'Fly ash bricks; Fly ash aggregates; Fly ash blocks.' The notification is made on the recommendations of the Council and is deemed to have come into force with effect from 18th July, 2022.