GST classification updated: substitution adds fly ash bricks, fly ash aggregates and fly ash blocks to the listed item. Substitution in the TABLE of the earlier notification replaces the column (3) entry against serial number 4 with 'Fly ash bricks; Fly ash aggregates; Fly ash blocks' under the proviso to sub section (1) of section 10 of the State GST Act, on the Council's recommendation; the amendment takes effect from the notified commencement date.