law: Standards of Weights and Measures Act, 1976 
  31. Part IV to apply
  
  to inter-State Trade or commerce only. – 
  The provisions of this
  
  Part shall apply to-
  (a) Every weight or
  
  measure which is, or is intended to be, -
  (i) Made
  
  or manufactured for the purpose of inter-State trade or commerce,
  (ii)
  
  Used, sold, distributed, delivered or otherwise transferred in the course of
  
  inter-State trade or commerce;
  (b) Goods which are,
  
  or are intended to be, sold, distributed, delivered or otherwise transferred by
  
  weight, measure or number in the course of inter-State trade or commerce;
  (c) Every service
  
  which is rendered by weight, measure or number in relation to, or in the course
  
  of, inter-State trade or commerce.