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Rh of two or more of the authors was disclosed, as references to whichever of those authors died last.

(4) For the purposes of this section, the identity of an author shall be deemed to have been disclosed if—
 * (a) one of the names under which the work was published was the name of the author; or
 * (b) the identity of that author is generally known or can be ascertained by reasonable inquiry.

Copyright to subsist in joint works without regard to any author who is an unqualified person

79.—(1) Section 30(2) shall have effect, in relation to a work of joint authorship of which one of the authors is an unqualified person, or two or more (but not all) of the authors are unqualified persons, as if the author or authors, other than unqualified persons, had alone been the author or authors, as the case may be, of the work.

(2) For the purposes of subsection (1), a person is an unqualified person in relation to a work where, if he had alone been the author of the work, copyright would not have subsisted in the work by virtue of this Part.

Inclusion of joint works in collections for use in educational institutions

80. The reference in section 40(2) to other extracts from, or from adaptations of, works by the author of the extract concerned—
 * (a) shall be read as including a reference to extracts from, or from adaptations of, works by the author of the extract concerned in collaboration with any other person; or
 * (b) if the extract concerned is from, or from an adaptation of, a work of joint authorship—shall be read as including a reference to extracts from, or from adaptations of, works by any one or more of the authors of the extract concerned, or by any one or more of those authors in collaboration with any other person.