law: The Competition Act, 2002 
  Chapter IX Miscellaneous
  54. Power to exempt.-
  The Central
  
  Government may, by notification, exempt from the application of this Act, or
  
  any provision thereof, and for such period as it may specify in such
  
  notification- 
  a.  
  
    any
  
  class of enterprises if such exemption is necessary in the interest of security
  
  of the State or public interest;
  b.  
  
    any
  
  practice or agreement arising out of and in accordance with any obligation
  
  assumed by India under any treaty, agreement or convention with any other
  
  country or countries;
  c.  
  
  
  
    any
  
  enterprise which performs a sovereign function on behalf of the Central
  
  Government or a State Government:
  Provided that in case
  
  an enterprise is engaged in any activity including the activity relatable to
  
  the sovereign functions of the Government, the Central Government may grant
  
  exemption only in respect of activity relatable to the sovereign functions.