The work or image is in the public domain because the copyright term expired in the State of Palestine (Details). According to the Copyright Ordinance of 1924 where the Palestinian Copyright Act of 1911 applies too, the Arab Copyright Treaty of 1981, and the "Basic Law" of governmental Palestine which uses the old acts, all occupied territories of Palestine use Israeli copyright laws so it is also included, it states:
The copyright of anonymous and pseudonymous works shall be protected for 70 years after the date of their publication