Commencement of GST amendment rule: State fixes the operative commencement date for a specified amendment by formal notification. The State Government, exercising powers under Section 164 of the Madhya Pradesh Goods and Services Tax Act, 2017, appoints a day in June 2019 as the date on which the Madhya Pradesh Goods and Services Tax Amendment Rules, 2018 - specifically rule 12 as referenced in the departmental notification - shall come into force, thereby fixing the effective date of that amendment by formal gubernatorial notification.