A. Introduction 2
1. A Complex and Multifaceted Topic 2
2. A Tricky Preliminary Question: Defining ‘Administrative’ and ‘Constitutional’ Law 4
a) An Asymmetrical Demarcation on the Continent (Except Austria and the Netherlands) 4
b) The United Kingdom: A Fluid and Evolving Demarcation 6
3. Four Classic Theses Regarding the Relationship Between Both Areas of Law 8
B. The Two World Thesis: A rarity and conceptual absurdity 10
1. An Elusive ‘Theory’ 10
2. The German Debate over Otto Mayer’s Dictum 11
a) A Will-o’-the-wisp: Mayer’s Dictum as an Expression of the Two World Thesis 11
b) A Grain of Truth: The Problem of Constitutional Disruptions 13
3. The French Case: The Logical Impossibility of the Two World Thesis 14
a) France: The Home of the Two World Thesis? 14
b) The Two World Thesis in the Writings of René Chapus and Georges Vedel 16
c) A Grain of Truth: Rivalry between Courts and the Drifting Apart of the Two Legal Branches 18
4. A Last Rebuttal and an Outlook 20
a) The Bond between Constitutional and Administrative Justice 20
b) The Bond between Constitutional Law Scholarship and Administrative Law Scholarship 22
5. Interim Conclusions: A New Definition of the Problem 25
C. The United Kingdom: Still a Special Case? 25
1. Dicey and the Constitutional Freezing of Administrative Law 26
a) A False Generalization: The Existence of English Administrative Law 27
b) Dicey’s Profound Influence Indicates a Certain Primacy of Constitutional Principles 28
2. The Contemporary Constitutionalization of Administrative Law 29
a) The Debate over the Constitutional Foundations of Judicial Review 30
b) A Higher Rank for Parts of the Constitution Because of the Human Rights Act and the European Convention on Human Rights 31
D. The Common European Paradigm: A Two-Sided Relationship 33
1. A Broad Spectrum: Differences in Substance and Terminology 36
a) Outside the Mainstream: Sweden 36
b) The Mainstream’s Avant-garde: Germany 40
c) A Variant Within the Mainstream: France 42
2. The Causes of the Diversity: The Different Parameters of a Complex Phenomenon 45
a) The Number of Administratively-Relevant Constitutional Norms 45
b) Preconceptions: The Constitution as the Law’s World Egg or as a Framework? 48
c) Preconceptions: Abstractness and Normativity of Constitutional Principles 50
d) The Telos of the Constitution: Transformation or Consolidation of the Pre-Existing (Administrative) Ordinary Law? 52
e) The Primacy and Legitimacy of the Constitution 54
f) The Stability or Instability of the Constitution 55
g) The Guardianship of the Constitution: Are Administrative Authorities Entitled, Or Even Obliged, to Ignore Unconstitutional Norms? 56
h) Courts (Constitutional Courts and/or Administrative Courts) as Guardians of the Constitution 64
i) The Role of Scholars with Regard to Constitutionalization of Administrative Law 69
Law is a social construct, invented through a variety of conceptual tools. One classic tool is the subdivision of law into branches of law. To find their way through the virtually infinite number of legal norms, lawyers divide their kingdom into provinces. The lawyers’ intellectual horizon is split up, with boundaries and fences. His or her mental world is organized. When isolated from the rest of the legal world, each such province of law may develop its own ‘spirit’, having its own theory of legal sources, methods of interpretation, and/or fundamental principles. Such a process of insulation is encouraged by the creation of specific guardians or ‘gatekeepers’ (e.g., judges and scholars) for each legal area. However, it is also important to note that boundaries may be more or less open, allowing cross-border exchanges, interactions, and transfers, be they unilateral or bilateral. In the ancient, and rather obscure, metaphor of the tree of law, the various branches are connected to the trunk, whose roots plunge into a common ground. Far from being stopped, communication between legal branches might be organized and canalized. In some cases, the demarcation line may even be totally blurred, two provinces being intimately intertwined.