Concessional CGST rate revised for petroleum and coal bed methane supplies; substitution lowers the rate, effective from notified date. The notification amends Notification No. 3/2017 Central Tax (Rate) by substituting the entry in column (4) against S. No. 1 in the TABLE with '9%', thereby revising the concessional CGST rate applicable to specified supplies for petroleum operations and coal bed methane operations; the amendment is issued under section 11(1) of the Central Goods and Services Tax Act, 2017 and shall come into force on 22 September 2025.