GST notification amendment adds fly ash bricks, aggregates and blocks to the specified notified supplies list, altering taxable entries. An amendment substitutes the description at serial number 4, column (3) of the earlier GST notification with 'Fly ash bricks ; Fly ash aggregates ; Fly ash blocks', effected under the State Government's powers under the Nagaland Goods and Services Tax Act, 2017, and set to come into force on a specified commencement date.