Permission is needed when the work you would like to use is protected by copyright.
Before obtaining permission check to see if the work and your intended use is
Covered by a Creative Commons License or other open license
Licensed by the library and your intended use falls within the license’s scope
Covered by a Copyright Exemption (ex. Fair Use, Classroom Use Exemption (17 U.S.C. §110(1)))
If you have answered no to any of the above, permission should be obtained. If you are in doubt about a particular use, it is best to obtain permission. Repeated use of an item will require permission per each re-use. Permission is obtained by contacting the copyright holder. Information on how to secure copyright permission is oftentimes available on the publisher’s web site.
License: CC0 Public Domain