Commencement date: Section 11 of Chhattisgarh GST Amendment Act deemed effective retrospectively from 18 May 2020. The State Government appoints the 18th day of May, 2020 as the date on which the provisions of section 11 of the Chhattisgarh Goods and Services Tax (Amendment) Act, 2020 shall be deemed to have come into force, made under the powers conferred by sub section (2) of section 1 of the Act and effected by Notification No. 43/2020 - State Tax dated 19th November 2020.