Excise exemption for specified ethanol, methanol and biodiesel blends grants nil central excise on compliant blends. Amends Notification No. 11/2017 by substituting tariff table entries to define and classify specified ethanol, methanol and biodiesel blends that conform to Bureau of Indian Standards, prescribing nil central excise for those tariff entries; inserts Explanation 2 defining 'appropriate duties of excise' and 'appropriate Central tax, State tax, Union territory tax and Integrated tax'; comes into force on 2 February 2021 and excludes goods manufactured on or before 1 February 2021.