Copyright and Fair Use
According to the United States Copyright Office, copyright is "a form of protection grounded in the U.S. Constitution and granted by law for original works of authorship fixed in a tangible medium of expression. Copyright covers both published and unpublished works."
The fair use doctrine "has developed through a substantial number of court decisions over the years and has been codified in section 107 of the copyright law. . . The distinction between fair use and infringement may be unclear and not easily defined. There is no specific number of words, lines, or notes that may safely be taken without permission. Acknowledging the source of the copyrighted material does not substitute for obtaining permission."
Copyright:Fair Use, United States Copyright Office
Copyright and Fair Use at USNA
The USNA Copyright Instruction (ACDEANINST 5870.1A).
Guidelines to accompany the Instruction.