Effective rate of duty expanded to include LPG and CNG driven vehicles alongside petrol driven vehicles under Central Excise amendment. The notification substitutes the words 'Petrol driven vehicles' with 'Petrol, Liquefied Petroleum Gases (LPG) or Compressed Natural Gas (CNG) driven vehicles' in the Table to the principal Central Excise notification, thereby extending the stated effective rate of duty to vehicles driven by LPG and CNG alongside petrol. The amendment is made under the power conferred by sub section (1) of section 5A of the Central Excise Act, 1944 and notes its connection to the principal notification and its earlier amendment.