Rule commencement: State notification appoints a commencement date to implement specified NGST procedural provisions. The Finance Department, exercising statutory power under the State GST Act and rule-making provisions, issues a notification appointing a calendar date as the commencement date for specified procedural provisions of the Nagaland GST rules, thereby implementing a specified rule and its associated GST payment form; the notification is issued under the amended rules and signed by the officer on special duty (Finance).