It is an anonymous or pseudonymous work and 50 years have passed since the date of its publication
It is an audiovisual, photographic work or a broadcast, and 50 years have passed since the date of its publication
It is a sound recording, and 50 years have passed since the date of its creation
It is literary, musical or artistic work created pursuant to a commission from the government, and 50 years have passed since the date of its publication
It is literary, musical or artistic work, and 50 years have passed since the year of death of the author (or last-surviving author)
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