Federal courts in the United States have recognized Creative Commons (CC) licenses as legally binding contracts between the user (licensee) and the person who owns the copyright for the material (licensor). This contract involves rights and responsibilities for both parties. 

If you use materials released under a CC License, please keep in mind:

• Licensors can and do enforce their rights.
• When you use material, you agree to the license terms.
• You must comply with all the license terms. If you don’t, the license terminates automatically, and your use of the material may constitute copyright infringement.
• If the license terminates, you can restore your user rights by complying with the license within 30 days of discovering your violation of license terms. If you don’t comply within 30 days, you need explicit permission from the licensor to use the material. Be aware that, even when the license is reinstated, the licensor may hold you liable for copyright infringement during the period during which you did not comply with the license.

For more information, please refer to the Frequently Asked Questions (FAQs) on the Creative Commons website.

If you release materials under a CC License, please keep in mind:

• You cannot revoke a CC license. You may choose to stop making your material available, but licensees who had prior access to it may continue using it, in accordance with the original license terms.
• You should make the CC license clearly visible with the material so that users can easily discover it.
• You can demand compliance with the terms of your CC license and enforce your legal rights. However, you can enforce only the explicit terms of the license.
• If you discover that a user has violated your CC license, consult the recommendations on the Creative Commons webpage “What to Do if Your CC-Licensed Work is Misused”.

For more information, please refer to the Frequently Asked Questions (FAQs) on the Creative Commons website.