Part I
—cont.(3) Subject to the last preceding subsection, copyright subsisting in a work by virtue of this section shall continue to subsist until the end of the period of fifty years from the end of the calendar year in which the author died, and shall then expire:
Provided that if before the death of the author none of the following acts had been done, that is to say,—
(b) the performance of the work in public,
(c) the offer for sale to the public of records of the work, and
(d) the broadcasting of the work,
the copyright shall continue to subsist until the end of the period of fifty years from the end of the calendar year which includes the earliest occasion on which one of those acts is done.
(4) In the last preceding subsection references to the doing of any act in relation to a work include references to the doing of that act in relation to an adaptation of the work.
(5) The acts restricted by the copyright in a literary, dramatic or musical work are—
(b) publishing the work;
(c) performing the work in public;
(d) broadcasting the work;
(e) causing the work to be transmitted to subscribers to a diffusion service;
(f) making any adaptation of the work;
(g) doing, in relation to an adaptation of the work, any of the acts specified in relation to the work in paragraphs (a) to (e) of this subsection.
(6) In this Act “adaptation”—
(ii) in the case of a dramatic work, a version of the work (whether in its original language or a different language) in which it is converted into a non-dramatic work;
(iii) a translation of the work;
(iv) a version of the work in which the story or action is conveyed wholly or mainly by means of pictures in a form suitable for reproduction in a book, or in a newspaper, magazine or similar periodical; and
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