law: Standards of Weights and Measures Act, 1976 
  15. National prototypes.
  
  – 
  (1) For the
  
  purpose of deriving the value of the kilogram, the Central Government shall
  
  cause to be prepared a national prototype of the kilogram and shall cause its
  
  accuracy to be certified by the International Bureau of Weights and Measures in
  
  terms of the international prototype of the kilogram and shall deposit the same
  
  in such custody and at such place as that Government may think fit.
  (2) For the purpose of
  
  deriving the value of the meter, the Central Government may cause to be prepared
  
  a national prototype of the meter and, where such prototype is caused to be
  
  made, shall also cause its accuracy to be certified by the International Bureau
  
  of Weights and Measures and deposit the same in such custody and at such place
  
  as that Government may think fit.