law: The Legal Metrology Act, 2009
  8. Standard weight,
  
  measure or numeral. -
  1.  Any
  
  weight or measure which conforms to the standard unit of such weight or measure
  
  and also conforms to such of the provisions of section 7 as are applicable to
  
  it shall be the standard weight or measure.
  2.  Any
  
  numeral which conforms to the provisions of section 6 shall be the standard
  
  numeral.
  3.  No
  
  weight, measure or numeral, other than the standard weight, measure or numeral,
  
  shall be used as a standard weight, measure or numeral.
  4.  No
  
  weight or measure, shall be manufactured or imported unless it conforms to the
  
  standards of weight or measure specified under section 8: Provided that
  
  provisions of this section shall not apply for manufacture done exclusively for
  
  export or for the purpose of any scientific investigation or research.