Copyright subsisting in a work ... shall continue to subsist until the end of the period of 50 years from the end of the calendar year in which the author died, and shall then expire.[1956 Sec.2(3), 3(4)]
If the work had not been made public before the death of the author, copyright shall continue to subsist until the end of the period of 50 years from the end of the calendar year which it was made public.[1956 Sec.2(3), 3(4)]
Where the first publication of a literary, dramatic, or musical work. or of an artistic work other than a photograph, is anonymous or pseudonymous, any copyright subsisting in the work ... shall continue to subsist until the end of the period of 50 years from the end of the calendar year in which the work was first published, and shall then expire.[1956 2nd Sched. Sec.2]
The copyright in a photograph shall continue to subsist until the end of the period of 50 years from the end of the calendar year in which the photograph is first published, and shall then expire.[1956 Sec.3(4b)]
