Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
Article 8. Works Not Protected by Copyright
The following shall not be protected by copyright:
official documents (laws, court decisions and other texts of a legislative, administrative, judicial or diplomatic nature) together with official translations thereof;
State emblems and official signs (flags, armorial bearings, decorations, monetary signs and other State symbols and official signs);
works of folklore,
communications concerning events and facts that have an informational character.
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.