Exemption from tax under section 9(4) extended to 30 September 2019 by official notification extension. Exemption for payment of tax under section 9(4) of the CGST Act is extended by amending the prior state notification to substitute the earlier expiry with 30th September 2019, leaving all other terms unchanged; the amendment is made under the state provision empowering government action in the public interest on the council's recommendation.