law: Standards of Weights and Measures (Enforcement) Act, 1985
  10. Use of weights
  
  only or measures only in certain cases.-
  1.  The
  
  State Government may, by rules made in this behalf, direct that in respect of
  
  the classes of goods, services or undertakings or users specified therein--
  a.   no transaction,
  
  dealing or contract shall be made or had, or
  b.   no industrial
  
  production shall be undertaken, or
  c.   No use for protection
  
  shall be made, except by such weight, measure or number as may be specified
  
  therein.
  2.  Any
  
  rule made under sub-section (1) shall take effect in such area, from such
  
  future date and subject to such conditions, if any, as may be specified
  
  therein.