5:--

(2) The owner of the copyright in any work may assign the right, either wholly or partially, and either generally or subject to limitations to the United Kingdom or any self-governing dominion or other part of His Majesty’s dominions to which this Act extends, and either for the whole term of the copyright or for any part thereof, and may grant any interest in the right by licence, but no such assignment or grant shall be valid unless it is in writing signed by the owner of the right in respect of which the assignment or grant is made, or by his duly authorised agent:

Provided that, where the author of a work is the first owner of the copyright therein, no assignment of the copyright, and no grant of any interest therein, made by him (otherwise than by will) after the passing of this Act, shall be operative to vest in the assignee or grantee any rights with respect to the copyright in the work beyond the expiration of twenty-five years from the death of the author, and the reversionary interest in the copyright expectant on the termination of that period shall, on the death of the author, notwithstanding any agreement to the contrary, devolve on his legal personal representatives as part of his estate, and any agreement entered into by him as to the disposition of such reversionary interest shall be null and void, but nothing in this proviso shall be construed as applying to the assignment of the copyright in a collective work or a licence to publish a work or part of a work as part of a collective work.