File:Thống-Chế đã Nói - Đại-Pháp Khắng Khít Với Thái Bình, Như Dân ...

• Its author (or the last of its authors in the case of a collaboration work) died more than 70 years ago (CPI art. L123-1) and did not benefit from any copyright extension (CPI art. L123-8, L123-9 and L123-10)[1];
• It is an anonymous or pseudonymous work (the identity of the author has never been disclosed) or a collective work[2] and more than 70 years have passed since its publication (CPI art. L123-3);
• It is the recording of an audiovisual or musical work already in the public domain, and more than 50 years have passed since the performance or the recording (CPI art. L211-4).

1. ↑ Copyright extensions must be considered only in the case of musical works and of authors Mort pour la France (died during conflict, in the service of France). In other cases, they are included in the 70 years post mortem auctoris length (see this statement of the Cour de Cassation).
2. ↑ The collective work status is quite restrictive, please make sure that it is actually established.

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• It is a cinematographic work, photographic work, work of applied art or anonymous work first published more than 75 years ago. (See Commons:Copyright rules by territory/Vietnam)
• It is a cinematographic work, photographic work, dramatic work, work of applied art or anonymous work first published more than 50 years prior to January 1, 2010.
• It is another type of work, and the creator died more than 50 years ago.

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This work is in the public domain in the United States because it meets three requirements:

1. it was first published outside the United States (and not published in the U.S. within 30 days),
2. it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
3. it was in the public domain in its home country (Vietnam) on the URAA date (23 December 1998).