What is the CLA Licence?
The CLA (Copyright Licence Agency) was set up by the Authors' Licensing and Collecting Society (ALCS) and the Publishers' Licensing Society Ltd (PLS) to enable creators and publishers of original work to receive a fair recompense whenever their work is re-used. More details here
The University holds a CLA licence which allows content to be re-used within the legal requirements of copyright law. You can check what is covered here