<p>SUBNATIONAL OR REGIONAL PARLIAMENTS with legislative competences are increasingly active in EU affairs and are recognized as POTENTIAL ACTORS IN THE EU'S MULTI-LEVEL SYSTEM BY EU LAW. However, studies on the territorial effects of European integration and on the Europeanization of parliaments as well as parliamentarism have so far disregarded this group of parliaments. In the existing theoretical concepts of 'multi-level parliamentarism' subna...