law: Standards of Weights and Measures (Enforcement) Act, 1985
  74. Act not to apply
  
  in certain cases.-
  The provisions of
  
  this Act, in so far as they relate to the 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, or
  
  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.