law: Railways Act, 1989
  167. Smoking. 
  (1) No person in any compartment of a train shall, if objected
  
  to by any other passenger in that compartment, smoke therein.
  (2) Notwithstanding anything contained in sub-section (1), a
  
  railway administration may prohibit smoking in any train or part of a train.
  (3) Whosoever contravenes the provisions of sub-section (1) or
  
  sub-section (2) shall be punishable with fine which may extend to one hundred
  
  rupees.