GST notification amendment updates specified table entries, substituting reference years and prescribing an October effective date. The Government, exercising statutory powers under the Karnataka Goods and Services Tax Act, 2017 and on the Council's recommendation, substitutes the figures '2020' with '2021' in column (5) against serial numbers 19A and 19B of the earlier notification; the amendment is limited to those table entries and comes into force on 1 October 2020.