law: Arms Act, 1959
  8. Prohibition of sale or transfer of firearms
  
  not bearing identification marks
  (1) No person, shall obliterate, remove, alter
  
  or forge any name, number or other identification mark stamped or otherwise
  
  shown on a firearm.
  (2) No person shall sell or transfer any
  
  firearm which does not bear the name of the maker, manufacturer’s number or
  
  other identification mark stamped or otherwise shown thereon in a manner
  
  approved by the Central Government.
  (3) Whenever any person has in his possession
  
  any firearms without such name, number or other identification mark on which
  
  such name, number or other identification mark has been obliterated, removed,
  
  altered or forged, it shall be presumed unless the contrary is proved, that he
  
  has obliterated, removed, altered or forged that name, number or other
  
  identification mark ;
  Provided that in relation to a person who has in
  
  his possession at the commencement of this Act any firearms without such name,
  
  number or other identification mark stamped or otherwise shown thereon, the
  
  provisions of this sub-section shall not take effect until after the expiration
  
  of one year from such commencement.