Films not protected as such
13. In relation to a film in which copyright does not or did not subsist as such but which is or was protected—
(a)as an original dramatic work, or
(b)by virtue of the protection of the photographs forming part of the film,
references in the new provisions, and in this Part, to copyright in a film are to any copyright in the film as an original dramatic work or, as the case may be, in photographs forming part of the film.