Tax notification amendment: substitution of schedule entry to classify fly ash products under state GST, effective mid July. The notification amends the TABLE of the principal state GST notification by substituting, against serial number 4 and column (3), the entry 'Fly ash bricks; Fly ash aggregates; Fly ash blocks'; issued under the proviso to sub-section (1) of section 10 of the State Goods and Services Tax Act and effective from 18th July, 2022.