What is Fair use?
See w:Fair use
Currently this page is setup to help develop a clear, easy to read and understandable offical Fair use policy.
Wikimedia foundation rules
A project-specific policy, in accordance with United States law and the law of countries where the project content is predominantly accessed (if any), that recognizes the limitations of copyright law (including case law) as applicable to the project, and permits the upload of copyrighted materials that can be legally used in the context of the project, regardless of their licensing status. See for full explanation meta:Resolution:Licensing_policy