Press release here
Quote: "To support the implementation of the Open Access Policy, WIPO will use the suite of Creative Commons Intergovernmental Organizations (IGO) licenses, which it helped develop with a group of international organizations in 2013. Creative Commons licenses are a widely used and easily understood set of copyright tools and model agreements that facilitate access to and use of creative content.
From now, new publications created and wholly owned by WIPO, as well as a selection of existing publications, will be licensed under the CC-BY 3.0 IGO license or one of the other licenses in the Creative Commons IGO suite. WIPO publications available under Creative Commons licenses will be clearly identified and searchable within the publications area of the WIPO website."