 | This work was first published in the Democratic Republic of the Congo and is now in the public domain because its copyright protection has expired by virtue of the Ordinance-Law No. 86-033 of 5 April 1986 on the Protection of Copyright and Neighboring Rights. The work meets one of the following criteria:
- It is an anonymous, pseudonymous or posthumous work and 50 years have passed since the date of its publication
- It is a photographic work, and 25 years have passed since the date of its publication
- It is another kind of work, and 50 years have passed since the year of death of the author (or last-surviving author)
- It is an "official act of authority" and ineligible for copyright protection.
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