Introduction
The principle of supremacy of European Union (EU) law asserts that EU law takes precedence over national laws of Member States, a concept developed by the European Court of Justice (ECJ) to ensure uniform application across the Union. The statement under discussion claims that recent case law on the rule of law demonstrates that this principle fails in practice, remains controversial, and faces systematic rejection by Member States. This essay critically examines this assertion by tracing the historical evolution of supremacy, analysing key ECJ and national court decisions, exploring modern resistance particularly in the context of the rule of law crisis, and considering Brexit’s implications. While supremacy has indeed faced challenges and controversies, especially in recent years, it is not entirely ineffective or universally rejected; rather, its application often depends on Member States’ willingness to cooperate. The analysis draws on landmark cases and scholarly insights to evaluate these claims, arguing that supremacy works variably in practice but encounters conditional acceptance rather than outright systematic rejection.
Historical Development of the Principle of Supremacy
The supremacy of EU law emerged as a foundational doctrine in the early years of European integration, evolving from treaty provisions to judicial pronouncements. Initially, the Treaty of Rome (1957) did not explicitly state supremacy, but Article 189 (now Article 288 TFEU) implied that regulations were directly applicable, setting the stage for prioritization over national law. This was further hinted at in Article 5 (now Article 4(3) TEU), which required Member States to abstain from measures jeopardizing treaty objectives (Craig and de Búrca, 2020).
The ECJ formally established supremacy in the 1960s, marking a significant evolution. In Van Gend en Loos (1963), the Court described the Community as a “new legal order” where states limited their sovereign rights, laying groundwork for supremacy. This was explicitly affirmed in Costa v ENEL (1964), where the ECJ ruled that EU law prevails over subsequent national legislation, as membership involves a “permanent limitation of sovereign rights” (Case 6/64). Indeed, this case illustrated the principle’s practical intent: an Italian law nationalizing electricity could not override EU treaty obligations. Furthermore, Internationale Handelsgesellschaft (1970) extended supremacy to include primacy over national constitutions, emphasizing that EU law’s validity cannot be challenged by domestic rules (Case 11/70).
These developments show supremacy as a judicial creation to ensure integration, but they also sparked controversy from the outset. Member States, accustomed to national sovereignty, viewed it as an overreach, highlighting early tensions that persist today. Generally, this historical foundation demonstrates that while supremacy was designed to work in practice, its imposition without explicit treaty backing made it inherently controversial.
Key ECJ Case Law and Reinforcement of Supremacy
Building on its historical roots, the ECJ has consistently reinforced supremacy through case law, aiming to make it effective in practice. In Simmenthal (1978), the Court mandated that national judges must disapply conflicting national laws without awaiting constitutional review, underscoring the direct enforceability of EU law (Case 106/77). This ruling addressed practical implementation, ensuring supremacy operates at the judicial level across Member States.
More recent ECJ decisions have linked supremacy to the rule of law, particularly amid crises in countries like Poland and Hungary. For instance, in Associação Sindical dos Juízes Portugueses (2018), the ECJ affirmed that judicial independence is essential for upholding EU law, indirectly bolstering supremacy by requiring Member States to maintain rule-of-law standards (Case C-64/16). However, these efforts reveal limitations; the principle works when states comply but falters amid resistance, supporting the statement’s claim of practical ineffectiveness in contentious scenarios.
Arguably, the ECJ’s approach has evolved to address modern challenges, yet it faces criticism for being overly assertive, which fuels controversy. As Craig and de Búrca (2020) note, while these cases strengthen supremacy’s theoretical framework, they do not always translate to uniform practice, especially where national courts push back.
National Courts’ Responses and Conditional Acceptance
National courts have often resisted full acceptance of supremacy, illustrating its controversial nature and occasional rejection, though not systematically. In Germany, the Solange I (1974) decision by the Federal Constitutional Court conditionally accepted supremacy, reserving the right to review EU law against fundamental rights if protections were inadequate (BVerfGE 37, 271). This evolved in Solange II (1986), where acceptance was granted provided EU safeguards matched German standards, showing a “conditional” embrace rather than outright rejection (BVerfGE 73, 339). Similarly, Brunner (1993) reaffirmed that Germany retains ultimate sovereignty, evaluating EU acts against its constitution (BVerfGE 89, 155).
Italy’s jurisprudence echoes this pattern. In Frontini (1973), the Constitutional Court accepted supremacy but not if it violated core constitutional principles (Judgment 183/1973). More recently, the Taricco saga (2015 and 2017) saw Italian courts challenge ECJ rulings on limitation periods for VAT fraud, prioritizing national procedural autonomy (Cases C-105/14 and C-42/17). This resistance, as analysed by Martinico (2017), highlights ongoing controversy but also demonstrates that rejection is not absolute; Italy’s Constitution (Article 11) allows limitations on sovereignty for international peace, indicating conditional cooperation.
Other states, like France and Ireland, have adopted similar stances, accepting supremacy unless it conflicts with fundamental norms. This widespread “conditional acceptance” counters the claim of systematic rejection, suggesting instead that supremacy is controversial but functional in many contexts, dependent on national interpretations.
Recent Developments: The Rule of Law Crisis and Polish Resistance
Recent case law on the rule of law, particularly in Poland, exemplifies the statement’s claims of practical failure and rejection. Poland’s Constitutional Tribunal has openly defied supremacy, as seen in Case K 3/21 (2021), declaring parts of the EU treaties incompatible with the Polish Constitution, prioritizing Article 8’s supremacy of national law. Earlier, in Case P 1/05 (2005) on the European Arrest Warrant, the Tribunal asserted constitutional primacy (Polish Constitutional Tribunal, 2005). These decisions, amid Poland’s rule-of-law crisis involving judicial reforms, have led to ECJ responses like Commission v Poland (2019), where infringements were found for undermining judicial independence (Case C-619/18).
Such resistance is controversial, prompting EU actions like withholding funds, yet it shows supremacy’s ineffectiveness when states systematically reject it. However, this is not universal; most Member States comply, indicating that rejection is not systematic across the EU but concentrated in specific cases. As explained by Pech and Scheppele (2017), these developments reveal supremacy’s vulnerability to populist challenges, though they do not negate its overall functionality.
Brexit Implications on EU Supremacy
Brexit, the UK’s withdrawal from the EU in 2020, provides a unique lens on supremacy’s controversies and rejections. Prior to Brexit, the UK accepted supremacy via the European Communities Act 1972, as affirmed in Factortame (1990), where UK courts disapplied national law conflicting with EU rules (R v Secretary of State for Transport, ex parte Factortame Ltd (No 2)). However, the 2016 referendum and subsequent withdrawal under Article 50 TEU rejected EU supremacy entirely, restoring full parliamentary sovereignty (European Union (Withdrawal) Act 2018).
This exit implications are profound: it demonstrates that supremacy can be controversially rejected when political will shifts, potentially encouraging other states. Yet, post-Brexit, the UK retains some EU law influences via the Trade and Cooperation Agreement, suggesting supremacy’s legacy persists indirectly. For remaining Member States, Brexit underscores the principle’s fragility, arguably weakening its practical application by highlighting exit as an option (Armstrong, 2017). Therefore, while not a direct rule-of-law case, Brexit reinforces the statement’s critique.
Conclusion
In summary, the principle of supremacy of EU law has evolved from its historical judicial foundations in cases like Costa v ENEL to modern reinforcements amid rule-of-law challenges. While recent developments, particularly in Poland, illustrate practical shortcomings, controversy, and instances of rejection, these are not systematic across all Member States; many exhibit conditional acceptance. Brexit further highlights supremacy’s vulnerabilities, implying potential for future rejections. Ultimately, the principle works in cooperative contexts but struggles where national sovereignty clashes, suggesting a need for stronger enforcement mechanisms to mitigate controversies. This nuanced reality neither fully supports nor refutes the statement, emphasizing supremacy’s variable efficacy in practice.
References
- Armstrong, K. (2017) Brexit Time: Leaving the EU – Why, How and When?. Cambridge University Press.
- Craig, P. and de Búrca, G. (2020) EU Law: Text, Cases, and Materials. 7th edn. Oxford University Press.
- Martinico, G. (2017) ‘The Taricco Saga: A Story of Progress or Regression in the Protection of Fundamental Rights?’ European Papers, 2(3), pp. 1023-1045.
- Pech, L. and Scheppele, K.L. (2017) ‘Illiberalism Within: Rule of Law Backsliding in the EU’, Cambridge Yearbook of European Legal Studies, 19, pp. 3-47.
