law: Standards of Weights and Measures (Enforcement) Act, 1985
  Chapter IV: Custody
  
  and Verification of Standard Equipments
  12. Custody and
  
  verification of reference standards.-
  Every reference
  
  standard shall be kept at such place and in such custody as may be prescribed,
  
  and no such reference standard shall be deemed to be a reference standard and
  
  shall be used as such unless it has been verified, authenticated and maintained
  
  in accordance with the rules made under the Standards Act.