law: Standards of Weights and Measures Act, 1976 
  68. Presumption to be
  
  made in certain cases. - 
  (1) If any
  
  person in the course of inter-State trade or commerce, uses, or causes to be
  
  used, sells, distributes, delivers or otherwise transfers, or causes to be
  
  sold, distributed, delivered or otherwise transferred, any false or unverified
  
  weight or measure, it shall be presumed, until the contrary is proved, that he
  
  had done so with the knowledge that the weight or measure was a false or
  
  unverified weight or measure.
  (2) If any person
  
  makes or manufactures or has in his possession, custody or control any false or
  
  unverified weight or measure in such circumstances as to indicate that such
  
  weight or measure is likely to be used in the course of inter-State trade or
  
  commerce, it shall be presumed, until the contrary is proved, that such false
  
  or unverified weight or measure was made, manufactured, possessed, held or controlled
  
  by such person with the knowledge that the same would be, or is intended to be,
  
  used in the course of inter-State trade or commerce.