Additional duty on unblended fuels established; new excise entries set phased applicability for retail petrol and diesel sales. The notification amends the excise table to impose an additional excise duty on motor spirit (petrol) and high speed diesel (HSD) when sold at retail without required blending. It inserts new tariff entries distinguishing branded and non branded retail supplies with specified additional duty rates, and adds provisos making the petrol entry operative from the November 2022 date and the diesel entry operative from the April 2023 date, while preserving prior treatment before those operative dates.