law: Standards of Weights and Measures (Enforcement) Act, 1985
  15. Secondary or
  
  working standard which may not be stamped.-
  1.  Where
  
  the State Government is of opinion that by reason of the size or nature of any
  
  secondary standard or working standard, it is not desirable or practicable to
  
  put a stamp thereon, it may direct that instead of putting a stamp on such
  
  secondary standard or working standard, a certificate may be issued to the
  
  effect that such secondary standard or working standard conforms to the
  
  standards established by or under the Standards Act and every secondary
  
  standard or working standard so certified shall be deemed to have been duly
  
  stamped under this Act on the date on which such certificate was issued.
  2.  Every
  
  certificate referred to in sub-section (1) shall be in such form as may be
  
  prescribed and shall contain such details as to enable a clear identification
  
  of the weight or measure to which it relates.