A work of the United States government, as defined by the United States copyright law, is "a work prepared by an officer or employee" of the federal government "as part of that person's official duties." In general, under section 105 of the Copyright Act, such works are not entitled to domestic copyright protection under U.S. law and are therefore in the public domain.
This act only applies to U.S. domestic copyright as that is the extent of U.S. federal law. The U.S. government asserts that it can still hold the copyright to those works in other countries.
Publication of an otherwise protected work by the U.S. government does not put that work in the public domain. For example, government publications may include works copyrighted by a contractor or grantee; copyrighted material assigned to the U.S. Government; or copyrighted information from other sources.
The first Federal statute concerning copyright in government publications was the Printing Law enacted in 1895. Section 52 of that Act provided that copies of "Government Publications" could not be copyrighted.
Prior to 1895, no court decision had occasion to consider any claim of copyright on behalf of the Government itself. Courts had, however, considered whether copyright could be asserted as to the text of laws, court decisions, governmental rules, etc., and concluded that such material were not subject to copyright as a matter of public policy. But other material prepared for State Governments by their employees, notably the headnotes, syllabi, annotations, etc. prepared by court reporters, had been held copyrightable on behalf of the States.
The Copyright Act of 1909 was the first copyright statute to address government publications. Section 7 of the Act (later codified as Section 8 of title 17 U.S.C.) provided that "No copyright shall subsist * * * in any publication of the United States Government, or any reprint, in whole or in part, thereof: * * *."
Prior to the Printing Act of 1895, no statute governed copyright of U.S. government works. Court decisions had established that an employee of the Federal Government had no right to claim copyright in a work prepared by him for the Government. Other decisions had held that individuals could not have copyright in books consisting of the text of Federal or State court decisions, statutes, rules of judicial procedures, etc., i.e., governmental edicts and rulings. Copyright was denied on the grounds of public policy: such material as the laws and governmental rules and decisions must be freely available to the public and made known as widely as possible; hence there must be no restriction on the reproduction and dissemination of such documents.