This work was first published on the Libya and is now in the public domain because its copyright protection has expired by virtue of the Copyright Protection Law, enacted 1968. The work meets one of the following criteria:
It is an anonymous work or pseudonymous work and 25 years have passed since the date of its publication
It is a work published after the death of the author and 50 have passed since the year of death of the author (or last-surviving author)
It is a photographic or cinematographic work that is not compositive (artistic in nature) and 5 years have elapsed since the end of the year of its publication
It is a work created by a legal public or private entity and 30 years have passed since the year the work was created
It is another type of work and than 25 years have elapsed since the the year of death of the author (or last-surviving author) and fifty years have elapsed since the year of publication.
It is one of "official documents such as texts of laws, decrees, regulations, international agreements, legal judgements and various official documents"
你必须增加美国公有领域标签显示为何这个作品在美国属于公有领域。
