Destination based tax on consumption allocated between centre and states under dual GST with input tax credit mechanism. GST is a destination based tax on consumption levied at each stage with set-off of prior-stage taxes. The design is a dual GST: Centre and States impose CGST and SGST on intra State supplies while the Centre levies IGST on inter State supplies; CGST and SGST credits are generally confined to their respective liabilities. Imports attract IGST with set-off, exports are zero rated with refund or bond options, and a GST Council recommends rates, exemptions, thresholds and apportionment principles.