(1) Subject to this section, the categories of works in which copyright under this Act may subsist are—
(a) original literary, dramatic, musical or artistic works;
(b) sound recordings, films, broadcasts or cable programmes;
(c) typographical arrangements of published editions.
(2) A literary, dramatic or musical work shall not be eligible for copyright protection unless it is written down, recorded or otherwise fixed in a material form; and the storage of the work in a computer shall be regarded as a recording of the work in a material form.
(3) It is immaterial for the purposes of subsection (2) whether the work is recorded by or with the permission of the author.
(4) Copyright may subsist in a work although the making of the work involved an infringement of copyright subsisting in some other work or of the rights in a performance.