law: Factories Act, 1948 
  31. Pressure plant 
   52  [(1) If in any factory, any plant or machinery or any part
  
  thereof is operated at a pressure above atmospheric pressure, effective
  
  measures shall be taken to ensure that the safe working pressure of such plant
  
  or machinery or part is not exceeded.]
  (2) The State Government may make rules providing for the
  
  examination and testing of any plant or machinery such as is referred to in
  
  sub-section (1) and prescribing such other safety measures in relation thereto
  
  as may in its opinion be necessary in any factory or class or description of
  
  factories.
   53  [(3) The State Government may, by rules, exempt, subject
  
  to such conditions as may be specified therein, any part of any plant or
  
  machinery referred to in sub-section (1) from the provisions of this section.]