law: Railways Act, 1989
  155. Entering into compartment reserved or resisting entry
  
  into a compartment not reserved.  
  (1) If any passenger- 
  (a) having entered a compartment wherein no
  
  berth or seat has been reserved by a railway administration for his use, or
  (b) having unauthorizedly occupied a berth or
  
  seat reserved by a railway administration for the use of another passenger,
  
  refuses to leave it when required to do so by any railway servant authorized in
  
  this behalf, such railway servant may remove him or cause him to be removed,
  
  with the aid of any other person, from the compartment, berth or seat, as the
  
  case may be, and he shall also be punishable with fine which may extend to five
  
  hundred rupees. 
  (2) If any passenger resists the lawful entry of another
  
  passenger into a compartment not reserved for the use of the passenger
  
  resisting, he shall be punishable with fine which may extend to two hundred
  
  rupees.