GST classification updated: Fly ash bricks, aggregates and blocks entry substituted, effective from mid July. Substitution of the entry at serial number 4, column (3), to read 'Fly ash bricks ; Fly ash aggregates ; Fly ash blocks' under the proviso to sub section (1) of section 10 of the Assam Goods and Services Tax Act, 2017; the amendment is deemed to have come into force from the 18th day of July, 2022 and updates the earlier notification dated 3 June 2019.