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 licence in writing by him or by his duly authorised agent:

Provided that in the case of a licence relating to copyright in any future work, the licence shall take effect only when the work comes into existence.

Explanation.—

Where a person to whom a licence 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 licence, be entitled to the benefit of the licence.