GST registration amendment inserts sub-section reference into Assam notification with retrospective effect from September 2021. The notification amends an earlier Assam GST notification by inserting the words 'sub-section (6A) or' after the phrase 'hereby pleased to notify that the provisions of' in the first paragraph. It is issued under the Assam Goods and Services Tax Act, 2017 and is stated to take effect retrospectively from 24 September 2021.