There are actually 20-seven member states who may have conferred powers on the EU institutions (other international locations are tied for the EU in other ways). In exchange for conferring competences, EU states are assigned votes during the Council, seats in Parliament along with a European Commissioner amid other items. https://gregorymsxbh.blogsvila.com/27429801/icc-seeking-arrest-warrants-for-hamas-leaders-and-israel-s-netanyahu