law: Railways Act, 1989
  132. Limitation of hours of work. 
  (1) A railway servant whose; employment is essentially
  
  intermittent shall not be employed for more than seventy-five hours in any
  
  week.
  (2) A railway servant whose employment is continuous shall not
  
  be employed for more than fifty-four hours a week on an average in a two wary
  
  period of fourteen days.
  (3) A railway servant whose employment is intensive shall not be
  
  employed for more than forty-five hours a week on an average in a two weekly
  
  period of fourteen days.
  (4) Subject to such rules as may be prescribed, temporary
  
  exemptions of railway servants from the provisions of sub-section (1) or
  
  sub-section (2) or sub-section (3), may made by the prescribed authority if it
  
  is of opinion that such temporary exemptions are necessary to avoid serious
  
  interference with the ordinary working of the railway or in cases of accident
  
  actual or threatened, or when argent work is required to be done to the railway
  
  or to rolling stock or in any emergency which could not have been foreseen or
  
  prevented. or in other cases of exceptional pressure of work:
  Provided  that where such exemption results in, the
  
  increase of hours of employment of a railway servant referred to in any of the
  
  sub-section, he shall be paid overtime at not less than two times his ordinary
  
  rate of pay for the excess hour of work.