File:Cesar-vallejo-niza-1929.jpg

• The photographic, artistic, scientific or literary work did not bear the real name of the natural or legal person, and
• This work was not credited or nor registered its name in the National Copyright Registry 15 years after its publication.

However, the work was not renewed on the URAA date (January 1, 1996) and is not protected in the United States. More info in COM:Peru. It is necessary to verify if the publication was not registered or lacks information about the authors during the 15 years of publication.
Warning: The Peruvian copyright law of 23 April 1996 repealed law 13714, in its transitory provisions it indicates that only "[the works still] protected in accordance with the previous law, will enjoy the most extensive terms of protection recognized in this Law" and denies retroactive effect.
Note: Note: The cases of anonymous photography and amateur video are "media not appropriate to their nature" and therefore are not protected by law as authors in the Andean Community. But, scripts, scores and other artistic interpretations could be separately protected by natural or legal entity.

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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).