»Declaratory Actions before Administrative Courts and Parliamentary Acts. An Analysis with Special Regard to the Institutional Relationship Between the Federal Constitutional Court and Administrative Courts«: The thesis focuses on the distinction between administrative and constitutional legal actions regarding parliamentary acts. Starting from a basic institutional perspective, the thesis outlines and assesses the key developments in case law in a systematic approach. In this context, the implications for the institutional relationship between the two jurisdictions as well as practical legal issues are discussed.