Fair Use

The four Fair Use criteria from the 1976 Copyright Act are:

1. The purpose and character of the use, including whether use is commercial or is for non-profit educational purposes. 
2. The nature of the copyrighted work.
3. The amount and substantiality of the portion used in relation to the copyrighted work as a whole. 
4. The effect of the use upon the potential market for or value of the copyrighted work.