The higher court within the CJEU. It handles preliminary rulings, appeals on points of law from the General Court, and certain important direct actions.

The first-instance court within the CJEU for many direct actions, especially cases brought by companies and individuals (for example, competition, state aid, trade).

Preliminary ruling (Article 267 TFEU)

A procedure where national courts ask the Court of Justice to interpret EU law or review the validity of EU acts, so they can apply EU law correctly in cases before them.

Infringement action (Articles 258–260 TFEU)

A case brought mainly by the Commission against a Member State for failing to fulfil its obligations under EU law. The Court can declare a breach and, if needed, impose financial penalties.

Court of Justice of the European Union, the EU’s judicial system based in Luxembourg, including the Court of Justice and the General Court.

The principle that EU law prevails over conflicting national law.

An EU value requiring that all public power be exercised under the law, with independent courts and effective judicial protection.

What is Direct effect?

The ability of certain EU law provisions to create rights that individuals can rely on directly in national courts.

The Court of Justice of the EU: Guardian of the Treaties — EU Law 101: Foundations of the European Union Legal Order

Meet the CJEU: Why It Matters

What Is the CJEU?

The Court of Justice of the European Union (CJEU) is the top court of the EU legal system. It makes sure EU law is interpreted and applied in the same way in all EU countries.

Why It Matters Now

As of 2026, the CJEU is central in big cases: competition fines on tech giants, rule-of-law disputes with some Member States, and fundamental rights issues under the EU Charter.

Guardian of the Treaties

The CJEU checks that EU institutions and Member States follow the Treaties. It also guides national courts when they apply EU law at home.

Link to Earlier Modules

You learned how EU law is made and how it applies at home. Now you will see how the CJEU enforces and interprets that law at the highest level.

Structure of the CJEU Today

Two Main Courts

The CJEU is a system with two main courts: the Court of Justice and the General Court. Both are based in Luxembourg.

Court of Justice

The Court of Justice has one judge from each Member State and several Advocates General. It focuses on preliminary rulings, appeals, and key direct actions.

General Court

The General Court, also with one judge per Member State, hears many direct actions, especially in competition, state aid, trade, and cases brought by companies and individuals.

No More Civil Service Tribunal

The former Civil Service Tribunal was merged into the General Court in 2016, so today there are only two courts in the CJEU structure.

Appointment of Judges

Judges and Advocates General are appointed by agreement of Member State governments for renewable 6-year terms and must be fully independent and highly qualified.

Example: A Competition Fine Journey

Step 1: Commission Fine

The European Commission fines a tech company for abusing a dominant position in the EU market. The company believes the decision is unfair or unlawful.

Step 2: General Court

The company brings an action for annulment before the General Court. The court checks facts, procedure, and whether the Commission applied competition law correctly.

Step 3: Judgment

The General Court can confirm, reduce, or annul the fine. It gives detailed reasons, often hundreds of paragraphs long in complex cases.

Step 4: Appeal to Court of Justice

If still unhappy, the company or Commission can appeal to the Court of Justice, but only on points of law, not to re-argue all the facts.

Why This Matters

This two-level structure lets the General Court handle complex evidence, while the Court of Justice keeps the interpretation of EU competition law uniform across the EU.

Key Procedure 1: Preliminary Rulings (Article 267 TFEU)

What Is a Preliminary Ruling?

A preliminary ruling is when a national court asks the Court of Justice how to interpret EU law or whether an EU act is valid, so it can decide a case correctly.

Who Decides What?

The Court of Justice answers the EU law question. The national court then applies that answer to the facts of the case and gives the final judgment to the parties.

Why It Matters

This procedure keeps EU law uniform across all Member States and lets individuals reach the CJEU indirectly through their national courts.

Who Can Ask?

Any national court can ask. Courts of last instance usually must ask if EU law is unclear, unless the answer is already obvious from existing case law.

Speeding Things Up

For urgent issues, such as asylum or European Arrest Warrants, the Court of Justice can use accelerated or urgent procedures to provide faster answers.

Example: Preliminary Ruling in Action

Your Dispute

You think an online streaming service from another EU country is breaking your EU consumer rights, so you sue in your national court.

The Judge Is Unsure

The judge is not sure how to interpret a key article in an EU consumer directive. Does it cover your online contract or not?

Question to the CJEU

The judge sends a preliminary reference to the Court of Justice, asking how to interpret that article and whether it applies to cross-border online services.

CJEU Answer

The Court of Justice explains the correct meaning of the article, for example that it does apply and should protect consumers strongly.

Impact Across the EU

Your case leads to a CJEU ruling that guides courts and companies across all Member States, not just in your country.

Key Procedures 2 and 3: Infringement & Annulment Actions

Infringement Actions: Who Is on Trial?

In infringement actions, the Court checks whether a Member State has failed to meet its EU law obligations. The most common applicant is the European Commission.

Consequences for States

If the Court finds a breach, the Member State must fix it. If it does not, the Court can later impose financial penalties such as lump sums or daily fines.

Annulment Actions: Controlling EU Institutions

Annulment actions ask the Court to cancel an EU act that is unlawful. Member States and EU institutions have broad access; individuals have more limited access.

Grounds for Annulment

Key grounds are lack of competence, procedural errors, violation of the Treaties or fundamental rights, and misuse of powers.

Effect of Annulment

If an act is annulled, it becomes void. The EU institution often has to adopt a new act that respects the Court’s legal reasoning.

Thought Exercise: Match the Case to the Procedure

Try to match each short scenario to the most likely CJEU procedure. Think before you scroll down to the hints.

A national court is unsure how to interpret a provision in the GDPR (EU data protection law) in a case between a citizen and a social media company.
The European Commission believes a Member State has not correctly applied an EU air quality directive, and pollution limits are often exceeded.
A company has received a large fine from the Commission for participating in a cartel and wants to challenge the decision.
The European Parliament thinks a new Council regulation on migration was adopted using the wrong legal basis in the Treaties.

Your task:

For each scenario (1–4), write down which procedure fits best:
`preliminary ruling`
`infringement action`
`annulment action`

Scroll only after you have tried.

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Hints (check your answers):

National court + doubt about interpretation of EU law in a private dispute → preliminary ruling.
Member State allegedly failing to implement an EU directive → infringement action (likely brought by the Commission).
Company challenging a Commission fine → annulment action before the General Court.
Parliament challenging a Council regulation’s legal basis → annulment action before the Court of Justice (Parliament is a privileged applicant).

The CJEU’s Evolving Constitutional Role

From Market Court to Constitutional Court

The CJEU started as a court for the common market but has gradually taken on a role similar to a constitutional court for the whole EU legal order.

Supremacy and Direct Effect

Through early cases like Van Gend en Loos and Costa v ENEL, the Court created doctrines of direct effect and supremacy, giving EU law real power in national courts.

Fundamental Rights and the Charter

Since the Lisbon Treaty made the Charter binding, the Court regularly uses it to review EU acts and national measures that apply EU law for compliance with fundamental rights.

Rule-of-Law Crises

In recent years, the Court has ruled on judicial independence and disciplinary regimes for judges, using Articles 2 and 19 TEU to defend the rule of law in Member States.

Reforms to Cope with Workload

Changes to the Statute and Rules of Procedure, such as more General Court judges and urgent procedures, help the CJEU manage a growing and more sensitive caseload.

Quick Check: Procedures and Roles

Test your understanding of the CJEU’s main procedures and constitutional role.

Which statement best describes the preliminary ruling procedure under Article 267 TFEU?

It allows individuals to bring actions directly before the Court of Justice to challenge national laws.
It allows national courts to ask the Court of Justice how to interpret or test the validity of EU law so they can decide their own cases.
It allows the Commission to bring Member States before the Court of Justice for failing to fulfil their obligations under EU law.

Show Answer

Answer: B) It allows national courts to ask the Court of Justice how to interpret or test the validity of EU law so they can decide their own cases.

The preliminary ruling procedure is a form of judicial cooperation: national courts send questions on interpretation or validity of EU law to the Court of Justice, which replies so the national courts can decide the case. Direct challenges to national laws by individuals are not part of this procedure, and actions by the Commission against Member States are infringement actions, not preliminary rulings.

Key Terms Review

Flip these cards (mentally or with a partner) to review the main concepts from this module.

Court of Justice of the European Union (CJEU): The EU’s judicial system based in Luxembourg, including the Court of Justice and the General Court. It ensures that EU law is interpreted and applied uniformly and that the Treaties are respected.
Court of Justice: The higher court within the CJEU. It handles preliminary rulings, appeals on points of law from the General Court, and certain important direct actions.
General Court: The first-instance court within the CJEU for many direct actions, especially cases brought by companies and individuals (for example, competition, state aid, trade).
Preliminary ruling (Article 267 TFEU): A procedure where national courts ask the Court of Justice to interpret EU law or review the validity of EU acts, so they can apply EU law correctly in cases before them.
Infringement action (Articles 258–260 TFEU): A case brought mainly by the Commission against a Member State for failing to fulfil its obligations under EU law. The Court can declare a breach and, if needed, impose financial penalties.
Annulment action (Article 263 TFEU): An action asking the CJEU to cancel an EU act because it is unlawful, brought by Member States, EU institutions, or (under stricter conditions) individuals and companies.
Supremacy of EU law: The doctrine that EU law takes precedence over conflicting national law. Developed by the Court of Justice, for example in Costa v ENEL.
Direct effect: The doctrine that some EU law provisions can directly give rights to individuals, which they can invoke before national courts, as recognized in Van Gend en Loos.
EU Charter of Fundamental Rights: A binding document since the Lisbon Treaty, listing fundamental rights that the CJEU uses to review EU acts and national measures that apply EU law.
Rule of law in the EU context: A core EU value (Article 2 TEU) requiring, among other things, independent courts and effective judicial protection, enforced by the CJEU through its case law.

Key Terms

CJEU: Court of Justice of the European Union, the EU’s judicial system based in Luxembourg, including the Court of Justice and the General Court.
Supremacy: The principle that EU law prevails over conflicting national law.
Rule of law: An EU value requiring that all public power be exercised under the law, with independent courts and effective judicial protection.
Direct effect: The ability of certain EU law provisions to create rights that individuals can rely on directly in national courts.
General Court: The first-instance court in the CJEU for many direct actions, especially those brought by companies and individuals.
Annulment action: A procedure under Article 263 TFEU where the CJEU is asked to annul an EU act that is allegedly unlawful.
Court of Justice: The higher court in the CJEU, dealing mainly with preliminary rulings, appeals on points of law, and some important direct actions.
Preliminary ruling: A procedure under Article 267 TFEU where national courts ask the Court of Justice to interpret EU law or rule on the validity of EU acts.
Infringement action: A procedure under Articles 258–260 TFEU where the Court examines whether a Member State has failed to fulfil its obligations under EU law.
EU Charter of Fundamental Rights: A binding document listing fundamental rights in the EU, used by the CJEU to review EU acts and national measures applying EU law.