GST rate change for petroleum coal bed methane operations: state notification substitutes the applicable tax rate, effective mid July. The Finance Department amends Notification No. 3/2017 State Tax (Rate) by substituting the entry in column (4) against S. No. 1 in the TABLE to read 6% for goods relating to Petroleum Coal Bed Methane operations; the amendment is effective from the 18th day of July, 2022.