You will find 20-7 member states who may have conferred powers upon the EU establishments (other countries are tied to the EU in other means). In Trade for conferring competences, EU states are assigned votes inside the Council, seats in Parliament along with a European Commissioner among other things. Functions https://european-news53208.blogzet.com/icc-seeking-arrest-warrants-for-hamas-leaders-and-israel-s-netanyahu-41957297