Insertion of subsection (6A) or amends notified provisions under GST Act, making the change effective from the specified date. Amendment inserts the words 'sub-section (6A) or' into the first paragraph of the prior notification under the Goa Goods and Services Tax framework, enacted under the authority of subsection (6D) of section 25, and deems the notification to have come into force from 24th September, 2021.