IGST rate amendment adds oncology medicines and reclassifies snack and seat tariff entries altering tax rates. Amendment to the IGST rate schedule inserts specified oncology medicines into the 5% list; adds an extruded or expanded savoury product heading at 12%; expands the extrusion snack description in the 18% schedule; substitutes the non-motor-vehicle seats entry in the 18% schedule; and inserts a distinct motor vehicle seats entry in the 28% schedule, with the amendments altering tariff classifications and applicable IGST rates.