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.