law: Copyright Act, 1957 
  30. Licenses by owners of copyright- 
  The owner of the copyright in any existing
  
  work or the prospective owner of the copyright in any future work may grant any
  
  interest in the right by license in writing signed by him or by his duly
  
  authorized agent.
  Provided  that in the case of a license relating
  
  to copyright in any future work, the license shall take effect only when the
  
  work comes into existence.
  Explanation – When a person to whom
  
  a license relating to copyright in any future work is granted under this
  
  section dies before the work comes into existence, his legal representatives
  
  shall, in the absence of any provision to the contrary in the license , be entitled
  
  to benefit of the license.