Notification date amendment shifts statutory dates; substitutions applied and given retrospective effect from the earlier date. The notification amends the principal State Tax notification by substituting '31st day of March' with '30th day of June' and '01st day of April' with '1st day of July' in the first paragraph; the amendment is made under section 128 of the Goods and Services Tax Act and is effective from 30th March, 2021.