law: Co-Operative Societies Act 2008 
  Part
  
  VI Business of Society
  101.
  
  Marketing of produce through the society
  1.      A registered society
  
  which has as one of its objects the marketing of any article or produce
  
  obtained by the work or industry of its members may by its by-laws or
  
  otherwise, contract with its members—
  a.     
  
    that
  
  every such member who produces any such article shall market the whole or any
  
  specified amount, portion or description thereof to or through the society;
  b.    
  
    that
  
  any member who is proved or adjudged to have contravened the by-law or to have
  
  acted in breach of the contract shall pay to the society liquidated damages in
  
  a sum ascertained or assessed in such a manner as may be prescribed in the
  
  by-laws.
  2.      A contract entered
  
  into under this section shall not be questioned in any court on the ground that
  
  it is a contract in restraint of trade.