law: Narcotic Drugs and Psychotropic Substances Act, 1985
  12. Restrictions over external dealings
  
  in narcotic drugs and psychotropic substances.
  No person shall engage in or control any trade whereby a
  
  narcotic drug or psychotropic substance is obtained outside India and supplied
  
  to any person outside India save with the previous authorization of the Central
  
  Government and subject to such conditions as may be imposed by that Government
  
  in this behalf.