You can find 20-7 member states who definitely have conferred powers on the EU institutions (other countries are tied for the EU in other approaches). In Trade for conferring competences, EU states are assigned votes in the Council, seats in Parliament as well as a European Commissioner amid other matters. https://beckettntzdh.targetblogs.com/27830042/icc-seeking-arrest-warrants-for-hamas-leaders-and-israel-s-netanyahu