(1) In this Part "author" (作者), in relation to a work, means the person who creates it.
(2) That person is taken to be-
(a) in the case of a sound recording, the producer;
(b) in the case of a film, the producer and the principal director;
(c) in the case of a broadcast, the person making the broadcast (see section 8(3)) or, in the case of a broadcast which relays another broadcast by reception and immediate re-transmission, the person making that other broadcast;
(d) in the case of a cable programme, the person providing the cable programme service in which the programme is included;
(e) in the case of the typographical arrangement of a published edition, the publisher.
(3) In the case of a literary, dramatic, musical or artistic work which is computer-generated, the author is taken to be the person by whom the arrangements necessary for the creation of the work are undertaken.
(4) For the purposes of this Part a work is of "unknown authorship" if the identity of the author is unknown or, in the case of a work of joint authorship, if the identity of none of the authors is known.
(5) For the purposes of this Part the identity of an author is regarded as unknown if it is not possible for a person to ascertain his identity by reasonable inquiry; but if his identity is once known it shall not subsequently be regarded as unknown.