Conference 'United in Diversity?'

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Interdisciplinary Perspectives on Mutual Recognition in European Law and Governance

Mutual recognition has been described as the principle of European law that most embodies the Union’s motto of being ‘United in Diversity’. Its strength lies in its ability to support the Union’s ambition of pursuing ‘an ever closer Union among the peoples of Europe’ via the non-hierarchical steering, coordination, and cooperation of the Member States across a wide and varied array of policy fields characterised by acute heterogeneity legally and politically. It allows the Union to secure unity without imposing uniformity and facilitate diversity without leading to fragmentation. 

Yet ironically, the study of mutual recognition is itself characterised by acute fragmentation and heterogeneity. Existing research on mutual recognition is siloed not only between disciplines but also between policy areas and legal fields. Legal scholars predominantly conceptualised mutual recognition as a legal rule, whereas political scientists view it as a form of political compromise in the form of a governance mode. Differences exist not just between disciplines but within them. Constitutional scholars view mutual recognition as a fundamental principle of the Union’s legal order. By contrast, for those working in risk regulation, for instance, the understanding of its application is based predominantly upon secondary legislation created by the Union’s political institutions, not constitutional law. 

While emerging from the freedom of goods via the Court of Justice’s decision in Cassis de Dijon, the principle has today proliferated beyond the bounds of the internal market into almost all areas of Union law and policy. This proliferation is largely the result of politics. The Delors Commission’s White Paper on completing the internal market marked a radical new approach to European integration, making a move away from the harmonisation of laws to the mutual recognition of laws, which was supported by the underlying logic of the Court’s decision in Cassis. As a result, mutual recognition is increasingly embedded in secondary legislation today, creating new pressures for European integration as different rules, regulatory approaches, values, and even social norms interact and even conflict. In turn, mutual recognition regulatory schemes have fostered the ‘circulation’ of administrative decisions throughout the EU, generating acts with transnational effects and thereby challenging the territoriality of administrative law. These regulatory structures generate horizontal interactions between national (administrative) legal orders which may clash with EU fundamental rights and effective judicial protection.

This event, organised by Rónán Riordan and Mariolina Eliantonio, brings together leading experts to explore how mutual recognition increasingly shapes European integration. The goal of the conference is to move away from the siloed approach to studying mutual recognition, which dominates its study today. Instead, the conference aims to look beyond our individual fields of research, encouraging a comprehensive overview of mutual recognition across all areas of Union law via an interdisciplinary and cross-policy approach. 

The conference brings together scholars, policymakers, practitioners, and judges to explore mutual recognition applications within the European Union. The conference, therefore, explores mutual recognition not through disciplines or policy areas, rather, instead, it considers its implications via ‘themes’. What does mutual recognition mean as a constitutional principle vs a governance mode, and how is it applied in risk regulation vs fundamental rights or climate protection? What are the broader implications of mutual recognition for European integration in a Union increasingly confronted with the challenges of being ‘United in Diversity’. 

The ultimate goal of the conference is to lay the groundwork for the creation of the first-ever Handbook on Mutual Recognition in Union Law, which will provide a comprehensive and authoritative reference point that breaks down the existing silos of knowledge. Deepening our understanding of mutual recognition as a mode of European governance, assessing its effectiveness, and considering its limitations for achieving an ‘ever closer Union’.

Day 1 | Thursday 29 January 2026

10.30 AMWelcome and registration
11.00 AMWelcome: Jan Smits (Professor of Private Law and Dean of the Faculty of Law at Maastricht University)
 Introduction: Rónán Riordan (Assistant Professor of European Law at Maastricht University) and
Mariolina Eliantonio (Professor of European and Comparative Administrative Law and Procedure at Maastricht University)
11.30 AMPanel 1: Mutual Recognition as an EU Constitutional Principle
 Imelda Maher: Full Professor of European Law at University College Dublin
Provisional title: Mutual Recognition as Constitutional Practice: Governing through Diversity
 Sacha Prechal: Professor of European Law at Utrecht University and Former Judge at the Court of Justice of the European Union
Provisional title: Mutual Trust as a structural support of mutual recognition
 Aileen Donnelly: Judge of the Supreme Court of Ireland
Provisional title: Mutual Recognition and the European Arrest Warrant Framework
1.00 PMLunch
2.00 PMPanel 2: Mutual Recognition as a Legislative Technique and Governance Mode
 Ton van den Brink: Full Professor and Jean Monnet Professor of EU Legislative Studies at Utrecht University
Provisional title: Mutual Recognition as a Legislative Strategy
 Kalypso Nicolaides: Professorial Chair of Global Affairs at the European University Institute’s School of Transnational Governance
Provisional title: Managing Mutual Recognition
3.00 PMCoffee break
3.30 PMPanel 3: Mutual Recognition as a Gateway and Hurdle to Fundamental Rights and Judicial Protection 
 Mariolina Eliantonio: Professor of European and Comparative Administrative Law and Procedure at Maastricht University
Provisional title: Mutual Recognition and Horizontal Composite Procedures in European Administrative Law
 Olivier Dubos: Professor of Public Law at the University of Bordeaux
Provisional title: Mutual Recognition and Transnational Judicial Review
 Sejla Imamovic: Assistant Professor of European Human Rights Law at Maastricht University
Provisional title: Mutual Recognition and EU Fundamental Rights Law: Facilitation and Friction
5.00 PMEnd of the first day
7.00 PMDinner for invited guests

Day 2 | Friday 30 January 2026

08.30 AMCheck-in & Coffee
09.00 AMPanel 4: Mutual Recognition as a Technique to Regulate Risks 
 Tamara Hervey: Jean Monnet Professor of EU Law at City University of London
Provisional title: Mutual Recognition in European Health Law
 Niamh Moloney: Professor of Law at London School of Economics
Provisional title: Mutual Recognition and Financial Regulation
 Annalisa Volpato: Associate Professor at the University of Padova
Provisional title: Mutual Recognition in GMOs and Novel Food Regulation
10.30 AMCoffee break
11.00 AMPanel 5: Mutual Recognition as a Technique to Foster Fundamental Freedoms
 Angelica Ericsson: Doctoral Researcher at the Univesity of Lund
Provisional Title: Mutual Recogntion and Pre-Authorisation Schemes in the  EU Single Market Law
 Sjoerd Claessens: Professor of Legal Education Development at Maastricht University
Provisional title: Mutual Recognition and Market Access in Regulated Professions
 Lavina Kortese: Assistant Professor of European Law at Utrecht University
Provisional title: The Mutual Recognition of Professional Qualifications
 Fulvia Ristuccia: Assistant Professor of EU Law, Maastricht University
Provisional title: The Mutual Recognition of Union Citizenship in Free Movement Law
1.00 PMLunch
2.00 PMPanel 6: Closing Session: Mutual Recognition and Contemporary Global Challenges
 Luca de Lucia: Full professor of Italian and European Administrative Law at University of Salerno
Provisional title: Mutual Recognition as a tool for the Green Transition
 Rónán Riordan: Assistant Professor of European Law at Maastricht University
Valentina Golunova: Assistant Professor in Digital Democracy at Maastricht University
Provisional title: Mutual Recognition and Enforcement Measures in the Digital Service Act
 Claudia Pina: Judge at the Central Court of Criminal Investigation in Lisbon
Provisional title: Mutual Recognition as a tool in cross-border Criminal Investigations and Digital Evidence
 Salvatore Nicolosi: Associate Professor of European and International Law at Utrecht University
Provisional title: Asymmetrical Mutual Recognition in EU Migration Law 
4.00 PMEnd

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