Die Tatbestandswirkung von Verwaltungsakten und Beschlüssen

The factual effect of administrative acts means that all state authorities applying the law must generally accept a legally effective administrative act and base further decisions on it as a given fact without reviewing its legality. Matthias Ziegler takes this brief definition from case law and literature as an opportunity to give the legal institution sharper contours. He examines to what extent transnational administrative acts and Commission decisions have a comparable effect in European administrative law.