It is an anonymous work, pseudonymous work or a work made for hire and 75 years have passed since the date of its publication or 100 years have passed since the date of its creation, whichever expires first
It is an audiovisual or collective work and 75 years have passed since the date of its publication or 100 years have passed since the date of its creation, whichever expires first
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 "official public legislative, administrative or legal texts, or any official translations thereof"