- The European Commission, which initiates legislation, is accountable to the European Parliament
- The EU's supranational institutions have greatest autonomy in technical matters e.g. central banking
- National governments are represented in the Council of the EU and the European Council
- The European Parliament shares legislative powers with the Council of the European Union- there is a system of checks and balances
- The EU does not have powers in key areas of national life, such as taxation, social security and education