• A work with a known author for which the author died more than 50 years ago.
• A work of joint authorship for which the longest-lived of the joint authors died more than 50 years ago.
• An anonymous work that was first published more than 50 years ago, or an anonymous work that was not published and which was created more than 50 years ago.
• A collective work or a computer program that was first published more than 50 years ago.
• A collective work or a computer program that was not published and which was created more than 50 years ago.
• A photograph that was first published or publicly displayed more than 50 years ago.
• A photograph that was not published or publicly displayed and which was created more than 50 years ago.
• An audiovisual work that was first published or presented more than 70 years ago.
• An audiovisual work that was not published or presented and which was created more than 70 years ago.
• A phonogram (sound recording) that was created more than 50 years ago.

Important note: Works of foreign (non-U.S.) origin must be out of copyright or freely licensed in both their home country and the United States in order to be accepted on Commons. Works of Dominican origin that have entered the public domain in the U.S. due to certain circumstances (such as publication in noncompliance with U.S. copyright formalities) and which were under copyright in the Dominican Republic on January 1, 1996 may have had their U.S. copyright restored under the URAA.[1]

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。 请注意这个作品在不适用较短期限法则的国家可能并不属于公有领域，并有超过作者逝世后50年的著作权期限。其中，墨西哥为100年，牙买加为95年，哥伦比亚为80年，危地马拉与萨摩亚为75年，瑞士和美国为70年，委内瑞拉为60年。