You can copy an unpublished written, artistic or musical work whose author has been dead for more than 50 years for a client who needs the copy for research or study, for example.
There are similar provisions for unpublished films and sound recordings made more than 50 years ago. (The application of these provisions to films is complex, however, and you may want to consider seeking further advice if relying on these provisions to copy a film.)
You can also copy a manuscript or other original version – such as a painting, first copy of a film or first copy of a sound recording – to supply to a person for research on the library’s premises or on the premises of another library. In these cases, it doesn’t matter whether or not the material has been published, provided you are copying a manuscript of other “original”.
Note also that a client may be able to rely on fair dealing provisions in the Copyright Act (for example, for the purposes of research and study) to copy the material themselves.