It is an anonymous work or pseudonymous work and 50 years have passed since the date of its publication (or creation, whatever date is the latest)
It is a collective work, audiovisual or posthumous work and 50 years have passed since the date of its publication (or creation, whatever date is the latest)
It is a work of applied art and 25 years have passed since the date of its creation
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 one of "acts, legal decisions and decisions of administrative bodies and the official translations of such texts"
