Special Additional Excise Duty increase on petroleum crude with reduced export duty on aviation turbine fuel, effective by notification. Special Additional Excise Duty on production of petroleum crude is increased and the duty on exports of aviation turbine fuel is reduced by substituting entries in the table of the principal notification No. 18/2022 Central Excise; the substitution replaces the column (4) entry for the first serial number with a higher per tonne duty and for the second serial number with nil, and specifies the notification's commencement date.