8.1 The Court of Justice of the European Union (CJEU)

8.1 The Court of Justice of the European Union (CJEU)

Official Reference: Treaty on European Union (TEU), Article 19; Treaty on the Functioning of the European Union (TFEU), Articles 251–281; Statute of the Court of Justice of the European Union (Protocol No. 3).

The Court of Justice of the European Union (CJEU), seated in Luxembourg, constitutes the judicial authority of the European Union. Under Article 19(1) TEU, the overarching constitutional mandate of the CJEU is to ensure that "in the interpretation and application of the Treaties the law is observed." Through seminal jurisprudence establishing fundamental doctrines such as the primacy of EU law (Costa v ENEL), direct effect (Van Gend en Loos), state liability (Francovich), and fundamental rights protection (Internationale Handelsgesellschaft), the Court has transformed the founding Treaties from an international compact between sovereign states into a constitutional legal order governing institutions, Member States, and citizens alike.

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Dual-Court Architecture & Composition

Following institutional streamlining—including the dissolution of the Civil Service Tribunal in September 2016 and the progressive doubling of the General Court's bench completed in 2019—the CJEU operates under a cohesive two-tier judicial architecture:

1. The Court of Justice (highest instance): Composed of exactly one judge per Member State (currently 27 judges) assisted by 11 Advocates General (AGs).
2. The General Court (first instance): Composed of two judges per Member State (currently 54 judges). The General Court does not have permanent Advocates General; instead, a judge may occasionally be designated to perform the role of Advocate General in complex individual cases, though in practice this is exceedingly rare.

Appointment and the Article 255 TFEU Panel

Judges and Advocates General are appointed by common accord of the governments of the Member States for a renewable term of six years. Partial replacements take place every three years, replacing half of the judges and Advocates General to ensure institutional continuity.

To be appointed, candidates must satisfy the highest standards of independence and possess either the qualifications required for appointment to the highest judicial offices in their respective Member States (for the Court of Justice, Art. 253 TFEU) or the ability required for appointment to high judicial office (for the General Court, Art. 254 TFEU).

A pivotal innovation introduced by the Treaty of Lisbon is the Article 255 TFEU Panel. Before national governments can formally appoint a candidate, this independent advisory panel—consisting of seven former members of the Court of Justice and General Court, members of national supreme courts, and lawyers of recognized competence (one proposed by the European Parliament)—must deliver a formal reasoned opinion on the candidate's suitability. The panel has established rigorous vetting standards, and has issued unfavourable opinions on a number of national nominees, which governments have in practice followed.

The Role of Advocates General

Under Article 252 TFEU, the role of the Advocate General is to act with complete impartiality and independence by presenting in open court reasoned opinions on cases that raise new questions of law. Key characteristics of the Advocates General include:

• They are full members of the Court with identical status, immunity, and tenure to the judges, but they do not participate in judicial deliberations or the final vote.
• Their opinions are wholly advisory and non-binding; the Court may adopt the AG's reasoning entirely, depart from it partially, or arrive at an entirely contrary conclusion.
• Of the 11 Advocates General, five are permanent appointments nominated by the largest Member States (Germany, France, Italy, Spain, and Poland), while the remaining six posts rotate among the other Member States in alphabetical order.

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Comparative Institutional Matrix

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The Preliminary Ruling Procedure (Article 267 TFEU)

The preliminary ruling mechanism represents the constitutional linchpin of the European legal order. It establishes a non-hierarchical, cooperative dialogue between national judiciaries and the Court of Justice, ensuring that European Union law is interpreted and applied with absolute uniformity across all Member States.

National Court encounters question of EU law (interpretation or validity)
       │
       ├─ Court of last instance? ──► MANDATORY referral (Art. 267(3))
       │                             (Exceptions: CILFIT acte clair / acte éclairé)
       │
       └─ Lower court? ─────────────► DISCRETIONARY referral (Art. 267(2))
                                     (Exception: Foto-Frost invalidity monopoly)
                                            │
                                            ▼
                             Court of Justice of the EU (CJEU)
                                            │
                                            ▼
                   Binding preliminary ruling issued (Erga Omnes)
                                            │
                                            ▼
                      National Court applies ruling to decide case

Discretionary vs. Mandatory Referral

• Lower Courts (Article 267(2) TFEU): Any national court or tribunal may refer a question on the interpretation of the Treaties or the validity and interpretation of acts of EU institutions if it considers a decision on the question necessary to deliver judgment. The decision to refer is discretionary.
• Courts of Last Instance (Article 267(3) TFEU): Where an EU law question is raised before a national court against whose decisions there is no judicial remedy under national law (e.g., supreme courts, constitutional councils, or courts where leave to appeal is denied), that court is strictly obligated to refer the question to the Court of Justice.

The CILFIT Exceptions to Mandatory Referral

In the landmark ruling CILFIT (Case 283/81), the Court established three alternative situations (any one is enough) in which a court of last instance is exempt from the obligation to refer. The Court restated and tightened them in Consorzio Italian Management (Case C-561/19, 2021):

1. Irrelevance: The question raised is completely irrelevant to the outcome of the domestic legal dispute.
2. Acte Éclairé: The question raised is materially identical to a question that has already been answered by the Court of Justice in a prior preliminary ruling, or established case law already resolves the point of law.
3. Acte Clair: The correct application of European Union law is so obvious as to leave no scope for any reasonable doubt. Crucially, the national judge must be convinced that the matter would be equally obvious to the courts of all other Member States and to the Court of Justice, taking into account the characteristic multilingualism of EU law (24 official authentic language versions), autonomous concepts of EU law, and the purposive (teleological) method of interpretation.

The Foto-Frost Monopoly on Invalidity

Under the doctrine established in Foto-Frost (Case 314/85), while any national court may conclude that an EU legal act is valid, national courts possess zero legal authority to declare acts of European Union institutions invalid. The Court of Justice retains an exclusive monopoly over declarations of invalidity. If a lower national court doubts the validity of an EU regulation, directive, or decision, it must submit a preliminary reference to the CJEU under Article 267 TFEU.

Preliminary rulings have erga omnes effect: they bind not only the referring national court in the main proceedings, but all national courts across the Union when applying the identical provision of EU law.

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Direct Actions Before the CJEU

Direct actions are lawsuits initiated directly before the European courts rather than routed through national judicial referrals.

1. Action for Annulment (Article 263 TFEU)

An action for annulment allows the CJEU to review the legality of legislative acts and regulatory measures adopted by EU institutions, bodies, offices, or agencies. Litigants are categorized into three distinct standing tiers:

The Standing Hurdles for Non-Privileged Applicants (Article 263(4) TFEU)

An individual or enterprise can challenge an EU act under one of three procedural pathways:

1. The act is directly addressed to the applicant (e.g., a Commission competition fine addressed to a specific company).
2. The act is addressed to another party or is in the form of a regulation/directive, but is of direct and individual concern to the applicant. Direct concern requires that the measure directly affects the legal situation of the person and leaves no discretion to implementing authorities. Individual concern is governed by the restrictive Plaumann doctrine (Case 25/62): the applicant is affected by reason of certain attributes peculiar to them or by reason of factual circumstances that differentiate them from all other persons, characterizing them identically to an addressee.
3. The act is a regulatory act (a non-legislative act of general application) that is of direct concern to the applicant and does not entail implementing measures (the Lisbon reform pathway, established in Inuit Tapiriit Kanatami and Telefónica). This pathway removes the near-impossible Plaumann individual concern test for self-executing executive regulations.

Grounds for Annulment: Actions must be grounded on one of four legal defects: (1) lack of competence; (2) infringement of an essential procedural requirement; (3) infringement of the Treaties or of any rule of law relating to their application; or (4) misuse of powers.

Strict Time Limit: The action must be instituted within two months of the publication of the measure, of its notification to the plaintiff, or, in the absence thereof, of the day on which it came to the knowledge of the plaintiff (extended by a mandatory 10-day distance allowance under the CJEU Rules of Procedure).

2. Action for Failure to Act (Article 265 TFEU)

If the European Parliament, European Council, Council, Commission, or ECB fails to act in violation of the Treaties, an action for failure to act may be brought. The action is admissible only if the institution has first been formally called upon to act (mise en demeure). The institution then has two months to define its position. If it fails to do so within that window, the applicant may institute proceedings before the CJEU within a further two months.

3. Action for Damages / Non-Contractual Liability (Articles 268 & 340(2) TFEU)

Under Article 340(2) TFEU, the Union must make good any damage caused by its institutions or servants in the performance of their duties. In the landmark Bergaderm ruling (Case C-352/98 P), the Court harmonized EU institutional liability with the Francovich conditions governing Member State liability. Three cumulative criteria must be proven:

1. The rule of law infringed was intended to confer rights on individuals.
2. The breach was sufficiently serious (the institution manifestly and gravely disregarded the limits on its discretion).
3. There is a direct causal link between the breach and the damage sustained by the injured party.

Actions for damages are subject to a five-year statute of limitations running from the occurrence of the event giving rise to the injury.

4. Infringement Actions (Articles 258–260 TFEU)

Infringement proceedings enforce Member State compliance with EU obligations:

• Article 258 TFEU (Commission vs. Member State): The Commission opens a pre-litigation phase by issuing a letter of formal notice (mise en demeure), followed by a reasoned opinion (avis motivé) setting a compliance deadline (usually two months). If the Member State fails to comply, the Commission may refer the case to the Court of Justice.
• Article 259 TFEU (Member State vs. Member State): Rare procedure where one Member State challenges another after first placing the matter before the Commission.
• Article 260 TFEU (Financial Sanctions): If a Member State fails to comply with an initial judgment finding an infringement, the Commission may bring the state back before the Court under Article 260(2) TFEU, requesting financial penalties: a lump sum (somme forfaitaire, penalizing past non-compliance) and/or a daily periodic penalty payment (astreinte, compelling future compliance). Under Article 260(3) TFEU (introduced by Lisbon), the Commission can propose financial penalties during the first referral if a Member State fails to notify national measures transposing a legislative directive.

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Jurisdictional Allocation & Modern Procedural Reforms

The General Court serves as the primary gateway for commercial and individual litigation, adjudicating direct actions brought by natural or legal persons against EU measures, competition antitrust and merger challenges against the Commission, and intellectual property appeals from the European Union Intellectual Property Office (EUIPO). Decisions of the General Court may be appealed to the Court of Justice within two months, but such appeals are strictly limited to points of law (lack of competence, procedural irregularities adversely affecting the applicant, or substantive infringement of Union law).

In a historic development, Regulation (EU, Euratom) 2024/2019 reformed the CJEU Statute to rebalance heavy judicial workloads by transferring preliminary ruling jurisdiction from the Court of Justice to the General Court in six specific technical domains: (1) the common system of VAT; (2) excise duties; (3) the Customs Code; (4) the tariff classification of goods; (5) passenger compensation and assistance; and (6) the greenhouse gas emission allowance trading system (EU ETS). The Court of Justice retains exclusive jurisdiction over all constitutional and Treaty-level preliminary references.