Russell, Carrie, and Dwayne K. Buttler. "Appendix B." Complete Copyright: an Everyday Guide for Librarians. Chicago: American Library Association, 2004. 192-93. Print.
Q: You borrow your friends copy of a CD and burn it to your computer when it is available for purchase in the bookstore- Is this okay according to copyright?
A: Yes, if you have the opportunity to purchase the work, than making a copy would be against copyright.
Q: One of your brass section is sick the night before your orchestra performance, you make a photocopy to give to the replacement- Is this okay?
A: According to Permissible Uses 1, emergency copying is allowable.
Q: I am teaching piano lessons and I have 4 pupils using the same materials, can I just make copies for them?
A: No, that would be against copyright. If you suddenly have 3 more than expected than you could make copies only on the first day.