law: Factories Act, 1948 
  55. Intervals for rest 
   71  [(1) 72[The periods of work] of adult workers
  
  in a factory each day shall be so fixed that no period shall exceed five hours
  
  and that no worker shall work for more than five hours before he has had an
  
  interval for rest of at least half an hour.
   73  [(2) The State Government or, subject to the control of
  
  the State Government, the Chief Inspector, may, by written order and for the
  
  reasons specified therein, exempt any factory from the provisions of
  
  sub-section (1) so however that the total number of hours worked by a worker
  
  without an interval does not exceed six.]