GST notification amendment substitutes tariff entry to list fly ash bricks, aggregates and blocks, effective from July. The commercial taxes notification amends notification No. S.O. 48 (7 March 2019) by substituting, in the table against serial number 4, the entry in column (3) with 'Fly ash bricks; Fly ash aggregates; Fly ash blocks'; the amendment is issued under subsection (2) of section 23 of the SGST Act and specifies that the notification shall come into force from 18th July, 2022.