law: The Legal Metrology Act, 2009
  55. Act not to apply
  
  in certain cases. -
  The provisions of
  
  this Act, in so far as they relate to verification and stamping of weights and
  
  measures, shall not apply to any weight or measure,-
  a.  
  
    used
  
  in any factory exclusively engaged in the manufacture of any arms, ammunition
  
  or both, for the use of the Armed Forces of the Union;
  b.  
  
    used
  
  for scientific investigation or for research;
  c.  
  
    manufactured
  
  exclusively for export.