law: Railways Act, 1989
  57. Maximum number of passengers for each
  
  compartment.  
  Subject to the approval of the Central Government, every railway
  
  administration shall fix the maximum number of passengers which may be carried
  
  in each compartment of every description of carriage, and shall exhibit the
  
  number so fixed in a conspicuous manner inside or outside each compartment in
  
  Hindi English and also in one or more of the regional languages commonly in use
  
  in the areas served by the railway.