GST notification amendment updates statutory cutoff dates, shifting end-March to end-June and start-April to start-July. Under the authority of Section 128 of the State Goods and Services Tax Act, the order substitutes '31st day of March' with '30th day of June' and '01st day of April' with '1 day of July' in the referenced notification, thereby shifting the applicable compliance cutoff and commencement dates without altering other provisions.