https://www.epo.org/en/service-support/faq/applying-patent/patent-prosecution-highway-pph/general-introduction-pph/where

Where can I find more, detailed information about the EPO PPH programmes?

For more, detailed information regarding the various PPH programmes please consult the agreements published in the Official Journal of the EPO:

You can also consult the EPO’s Euro-PCT Guide: PCT procedure at the EPO