law: Standards of Weights and Measures Act, 1976 
  49. Non-metric weight
  
  or measure not to be imported. - 
  (1)Save as
  
  otherwise provided in sub-section (2), no weight or measure, whether singly or
  
  as a part or component of any machine or machinery, shall be imported unless it
  
  conforms to the standards of weight or measure established by or under this Act.
  (2) Where any
  
  commodity, machinery or any part or component of any machinery is imported from
  
  a country in which the metric system of weight or measure is not in force, or
  
  in which such system being in force, such commodity, machinery, part or
  
  component of any machinery has not been made or manufactured in accordance with
  
  such system, the importer shall, before making such import make an endeavor to
  
  obtain, on such commodity, machinery, part or component, and also on the
  
  drawings thereof, the weight or measurement thereof expressed in terms of the
  
  standard unit of weight or measure established by or under this Act:
  Provided that where any weight
  
  or measure has not been expressed in terms of the standard unit of weight or
  
  measure established by or under this Act, on any commodity, machinery, part or
  
  component or on any drawings thereof the importer shall, within six months from
  
  the date of import, get the weight or measure thereof expressed on such
  
  commodity, machinery, part or component and on the drawings thereof in terms of
  
  the standard unit of weight or measure established by or under this Act.