law: Copyright Act, 1957 
  18. Assignment of copyright- 
  (1) The owner of the copyright in an existing
  
  work or the prospective owner of the copyright in a future work may assign to
  
  any person the copyright either wholly or partially and either generally or
  
  subject to limitations and either for the whole term of the copyright or any
  
  part thereof.
  Provided  that in the case of the assignment of
  
  copyright in any future work, the assignment shall take effect only when the
  
  work comes into existence.
  (2) Whereas the assignee of a copyright
  
  becomes entitled to any right comprised in the copyright, the assignee as
  
  respects the rights to assigned, and the assignor as respects the rights not
  
  assigned, shall be treated for the purposes of this Act as the owner of
  
  copyright and the provisions of this Act shall have effect accordingly.
  (3) In this section, the expression,
  
  "assignee" as respects the assignment of the copyright in any future
  
  work includes the legal representatives of the assignee, if the assignee dies
  
  before the work comes into existence.