This work is now in the public domain in Iran, because according to the Law for the Protection of Authors, Composers and Artists Rights (1970) its term of copyright has expired for one of the following reasons:
In the following cases works fall into the public domain after 30 years from the date of publication or public presentation (Article 16):
The media description page should identify which reason applies.
Per U.S. Circ. 38a., the following countries are not a participant in the Berne Convention or any other treaty on copyright with the United States:
As such, works published by citizens of these countries in these countries are usually not subject to copyright protection outside of these countries. Hence, such works may be in the public domain in most other countries worldwide.
Iran has enacted a copyright law which came into force on 12 January 1970 and communicated the Official English translation to UNESCO on 20 April 1970.