23 General exceptions regarding protection of published editions Section 15 (1), (2), (4), (5), (8), (12) and (13) shall apply mutatis mutandis with reference to a published edition. 24 General exceptions regarding protection of computer programs (1) Subject to section 29 (2) (d), the provisions of section 15 (1) (b) and (c), (2), (3), (4), (5), (12) and (13) shall apply mutatis mutandis with reference to a computer program. (2) The copyright in a computer program shall not be infringed by a person who is in lawful possession of that program, or an authorised copy thereof, if(a) such person makes copies thereof to the extent reasonably necessary for back-up purposes; (b) a copy so made is intended exclusively for personal or private purposes; and (c) such copy is destroyed when the possession of that program, or authorised copy thereof, ceases to be lawful. 25 Moral rights (1) Notwithstanding the transfer of the copyright in any work, being a literary, musical or artistic work, a cinematograph film or a computer program, the author shall have the right(a) to claim authorship of the work, subject to the provisions of this Act; and (b) to object to a distortion, mutilation or other modification of the work where such distortion, mutilation or modification is or would be prejudicial to the honour or reputation of the author, but an author(i) who authorises the use of his or her work in a cinematograph film or a television broadcast; or (ii) of a computer program or a work associated with a computer program, may not prevent or object to modifications that are necessary on technical grounds or for the purpose of commercial exploitation of the work. (2) Any infringement of subsection (1) shall be considered to be an infringement of copyright under Chapter 2, and for the purposes of the provisions of that Chapter the author shall be deemed to be the owner of the copyright in question. 26 Ownership of copyright Subject to section 27, the ownership of any copyright conferred by section 3 or 4 in a work shall vest in the author or, in the case of a work of joint authorship, in the co-authors of the work. 27 Ownership of copyright in works of employed authors (1) Where a literary or artistic work is made by an employee in the course of his or her employment by the proprietor of a newspaper, magazine or similar periodical under a contract of service or apprenticeship, and such work is so made for the purpose of publication in a newspaper, magazine or similar periodical, that proprietor shall be the owner of the