This title focuses on the interpretative methodologies and principles employed by international human rights organs in applying and developing human rights norms. It explores the role of various interpreters, including international, regional, and national courts, in shaping the meaning and scope of human rights. The section examines the methods of interpretation used by human rights bodies, such as textual, contextual, purposive, and evolutionary approaches, and the challenges in ensuring consistency and coherence across different jurisdictions. It also discusses the purposes of interpretation, including the protection of human rights, the development of international human rights law, and the promotion of judicial dialogue and coherence. By analyzing the interpretative practices of human rights organs, this title aims to provide a deeper understanding of the dynamics of human rights interpretation and the factors influencing the application of human rights norms in diverse legal and cultural contexts.

This part focuses on the interpretative methodologies and principles employed by international human rights organs in applying and developing human rights norms. It explores the role of various interpreters, including international, regional, and national courts, in shaping the meaning and scope of human rights. The sections examine the methods of interpretation used by human rights bodies, such as textual, contextual, purposive, and evolutionary approaches, and the challenges in ensuring consistency and coherence across different jurisdictions. It also discusses the purposes of interpretation, including the protection of human rights, the development of international human rights law, and the promotion of judicial dialogue and coherence. This part delves into the international legal regime governing human rights and freedoms, covering states’ general obligations, the conditions for engaging state responsibility, and the regime for the enjoyment and exercise of rights and freedoms. By analyzing the interpretative practices and legal obligations, this part aims to provide a deeper understanding of the dynamics of human rights interpretation and the factors influencing the application of human rights norms in diverse legal and cultural contexts.

This chapter discusses the various interpreters of international human rights law, including international courts, regional courts, and domestic courts. It examines their roles, authority, and the plurality of interpreters in the human rights legal framework. The chapter explores how different judicial and quasi-judicial bodies contribute to the development and interpretation of human rights norms. It also highlights the challenges and opportunities in achieving coherence and consistency in the interpretation of human rights law across different jurisdictions. The chapter emphasizes the importance of collaboration and dialogue among interpreters to enhance the protection of human rights.

The purpose of this chapter is to discuss the role of judicial dialogue between international courts in the interpretation of customary international human rights law. Judicial dialogue refers to international courts’ spontaneous practice of referencing other international courts’ decisions or international instruments that are outside the international court’s own judicial system. International courts engage in this practice in order to both identify rules of customary international human rights law and reach common interpretations on the meaning and scope of norms protecting human rights. Through the analysis of international courts’ case law, this chapter discusses the impact of judicial dialogue consisting in cross-references to legal norms and judicialdecisions on the interpretation of rules protecting human rights, especially when judges use case law from other courts in support of their interpretation.

This chapter puts the developed theory to the test. First, after outlining the most important case law of the CJEU on the relationship between EU and Member State law, which has introduced primacy of EU law (also over Member State constitutional law) and the doctrine of direct effect, this chapter also displays the most important judgments by Member State constitutional courts generally holding that there are limits to the primacy of EU law. After analyzing the most important theoretical conceptions and doctrines in literature addressing the difference between the CJEU and the Constitutional Courts of some Member States, this chapter shows how consent-based monism can provide for relief. According to consent-based monism, the EU is the larger circle with regard to its Member States. All EU Member States in turn are independent smaller circles which are also part of the EU circle. The EU competence regime is decisive in this regard. It is vital to pinpoint exactly which competences have been shifted to the European level. According to consent-based monism, an “integration resistant core” must not violate any consensus that has been obtained at the level of the larger EU circle. The larger circle must not autonomously add competences without authorization by all of the smaller circles.

Our understanding of cross-border judicial dialogue is dominated by the Global North, especially the analysis of the European judicial space, which has limited application outside Europe, and ‘global judicial dialogue’, which is a rather asymmetric phenomenon: Global South courts such as the South African and Colombian constitutional courts cite totemic Western courts such as the US and German courts with far greater frequency than vice versa. This chapter seeks to enhance our understanding of judicial dialogue from the African and Latin American perspectives, nuancing what dialogue means in Global South contexts by comparing the different patterns and facilitating conditions in these regions, including the impact of shared languages and legal traditions, the development of regional integration projects, and pan-regional democratic development. It is argued that leading national courts play highly significant roles in fostering intra-regional dialogue but can also hamper such dialogue by prioritising global extra-regional interlocutors in their citation practices and reproducing global dynamics through asymmetric citation patterns at the intra-regional level. While this pattern highlights the difficulty of de-centring and challenging Global North epistemic dominance in the arena of judicial dialogue, it also suggests that considered changes in judicial, practitioner, and scholarly practice and collaboration can disrupt these dynamics and generate more inclusive dialogue.

Considering that judicial fragmentation and convergence concern the interpretation of human rights norms and provisions, this chapter discusses how the human rights bodies under analysis engage with the theory of treaty interpretation. In particular, the chapter illustrates how the human rights systems are engaging differently with judicial dialogue. Through a detailed analysis of the practice of each body, this chapter shows how judicial dialogue led to convergence and how the lack of it led to fragmentation. However, the chapter also highlights situations where despite judicial dialogue fragmentation still arose, discussing the duality and complexity of this instrument for the maintenance of convergence.

This chapter focuses on the distribution of the burdens of argumentation in proportionality analysis. A survey of rights adjudication in Latin America and other countries suggests that the idea of proportionality as an interchange of reasons and justifications has substantial conceptual and institutional indeterminacies, which may only be solved with a view on the normative consequences of the different options in different contexts. The chapter explores two extreme versions of the distribution – the dialogic and the unilateral – but also the gradation or continuum between them, with flexible and strict versions of dialogue and open and closed modalities of unilateralism. The selection of one or another point along the spectrum has consequences in terms of normative rationales such as democracy, epistemic quality, integrity, equality or legal security, and should carefully account for contextual elements like patterns of access to justice, legal culture and procedural architectures.

The law of the sea is a great laboratory for observing the fabric of international law through the interactions between a variety of judicial bodies with jurisdiction to interpret and apply the same legal rules and principles. At first, the plurality of judicial fora available under UNCLOS has created concerns of fragmentation and of competition and forum shopping. These have proved so far unwarranted, since the tribunals generally deliver a uniform interpretation of the applicable law or tend at least toward harmonization. Tribunals have aimed to achieve clarity and consistency of the case law as well as transparency and predictability of the delimitation process. The concept of acquis judiciaire has been used to designate this mechanism of gradual building of a uniform law through the reiteration and cross-referral to existing judicial decisions. It is both a concept and a regulatory tool. It underlies a wilful search of harmonization and shows that judges are essential actors for ensuring the coherence of the international legal system.

This introduction reviews scholarship on international legal fragmentation, lays out a framework for understanding international judicial cross-fertilization, and previews the contributions and their findings. Existing scholarship on international legal fragmentation, we argue, has moved through three phases over the past several decades. In the first, legal scholars and practitioners reacted with alarm to the judicial proliferation of the post–Cold War years, which they feared would create overlapping jurisdiction and conflicting interpretations of law. Following this period, the new century saw the pendulum swing toward a second, more optimistic picture in which international courts addressed fragmentation through “management” techniques, producing unity in international law. We can detect the opening salvos of a third wave, as skeptics have questioned the management account, pointing to the mixed motives of international judges and the limits of cross-fertilization. In this volume, we build on the existing literature by theorizing the actors of cross-fertilization and their motives, and by distinguishing between procedural and substantive cross-fertilization.

Chapter 2 sets the descriptive, theoretical, and methodological stage for revisiting the behavior of national courts in the process of European integration. It describes the central institutional mechanism through which national courts can partner with the European Court of Justice (ECJ) to apply European law, exercise de facto judicial review, and promote integration: the “preliminary reference procedure.” It summarizes how national courts’ use of this procedure has been theorized by the prevailing account of the judicial construction of Europe: the “judicial empowerment thesis.” And it highlights suggestive qualitative and quantitative evidence that this thesis may conceal as much as it reveals. The chapter concludes by outlining the fieldwork strategy deployed to revisit the judicial empowerment thesis in Chapters 3 and 4 and probe whether national judges have harbored more diffuse and persistent resistances to European law, the ECJ, and institutional change than has hitherto been acknowledged.

National judicial systems within the European Union (EU) face pressures toward alignment under the policy agendas for judicial cooperation connected with the Lisbon Treaty and the widespread practice of ‘transnational borrowing’ among courts. Using the CJEU and ECtHR as case studies in the phenomena of judicial culture and transnational judicial communication, this chapter explores how constitutional norms and formal policies interact with contextual influences (including informal judicial interaction and evolving national ideas and practices regarding judging and judicial organisation) to produce increasing legal alignment among the member states. In doing so, the chapter explicitly highlights the need to combine comparative legal analysis with socio-legal research methods in order to understand the evolution of constitutional law.