law: Narcotic Drugs and Psychotropic Substances Act, 1985
  54. Presumption from possession of
  
  illicit articles.
  In trials under this Act, it may be presumed, unless and until
  
  the contrary is proved, that the accused has committed an offence under Chapter
  
  IV in respect of-
  (a) any narcotic drug or psychotropic substance;
  (b) any opium poppy, cannabis plant or coca plant growing on any
  
  land which he has cultivated;
  (c) any apparatus specially designed or any group of utensils
  
  specially adopted for the manufacture of any narcotic drug or psychotropic
  
  substance; or
  (d) any materials which have undergone any process towards the
  
  manufacture of a narcotic drug or psychotropic substance, or any residue left
  
  of the materials from which any narcotic drug or psychotropic substance has
  
  been manufactured, for the possession of which he fails to account
  
  satisfactorily.