law: Railways Act, 1989
  72. Maximum carrying capacity for wagons and trucks. 
  
   
  (1) The gross weight of every wagon or truck bearing on the
  
  axles when the wagon or truck is loaded to its maximum carrying capacity shall
  
  not exceed such limit as may be fixed by the Central Government for the class
  
  of axle under the wagon or truck.
  (2) Subject to the limit fixed under sub-section (1), every
  
  railway administration shall determine the normal carrying capacity for every
  
  wagon or truck in its possession and shall exhibit in words and figures the
  
  normal carrying capacity so determined in a conspicuous manner on the outside
  
  of every such wagon or truck.
  (3) Every person owning a wagon or truck which passes over a
  
  railway shall determine and exhibit the normal carrying capacity for the wagon
  
  or truck in the manner specified in sub-section (2).
  (4) Notwithstanding anything contained in sub-section (2) or sub-section
  
  (3), where a railway administration considers it necessary or expedient so to
  
  do in respect of any wagon or truck carrying any specified class of goods or
  
  any class of wagons or trucks of any specified type, it may vary the normal
  
  carrying capacity for such wagon or truck or such class of wagons or trucks and
  
  subject to such conditions as it may think fit to impose, determine for the
  
  wagon or truck or class of wagons or trucks such carrying capacity as may be
  
  specified in the notification and it shall not be necessary to exhibit the
  
  words and figures representing, the carrying capacity so determined on the
  
  outside of such wagon or truck or such class of wagons or trucks.