"Limitations on Exclusive Rights: Fair Use" is found in Title 17, Chapter 1, Section 107 of the U.S. Code. Fair Use of a copyrighted work limits the exclusive rights of copyright holders (e.g. authors, artists, creators), outlined in Section 106, for purposes such as:
In determining whether the use of a work is a Fair Use, consider these four factors:
You must consider all four factors together when evaluating the fair use of a copyrighted work.
Important Fair Use litigation since the 1990s shows that judges return again and again to two key analytical questions:
Source: "More information on Fair Use". U.S. Copyright Office