law: Copyright Act, 1957 
  7. Nationally of author were the making
  
  of unpublished work is extended over considerable period- 
  Where, in the case of an unpublished work the
  
  making of the work is extended over a considerable period, the author of the
  
  work shall, for the purposes of this Act, be deemed to be a citizen of, or
  
  domiciled in, that country of which he was a citizen or wherein he was
  
  domiciled during any substantial part of that period.