Infringement Proceedings Against Member States: Articles 258–260 TFEU

Infringement Proceedings Against Member States: Articles 258–260 TFEU

1. Introduction

The European Union is a legal order in which the obligations imposed by the Treaties and by secondary legislation must be respected by all Member States. The adoption of common rules, however, does not by itself guarantee their effective application. EU law may be violated through national legislation, administrative decisions, judicial practices, failures to implement directives, or the refusal of public authorities to fulfil obligations arising under the Treaties.

The Treaties therefore establish a system of judicial enforcement designed to determine whether a Member State has failed to fulfil its obligations under EU law and, where necessary, to compel it to bring the infringement to an end.

The central legal framework is contained in Articles 258, 259 and 260 of the Treaty on the Functioning of the European Union (TFEU). Together, these provisions establish three complementary mechanisms:

• Article 258 TFEU enables the European Commission to bring proceedings against a Member State.
• Article 259 TFEU allows one Member State to bring proceedings against another.
• Article 260 TFEU governs the consequences of a judgment finding an infringement and provides mechanisms for imposing financial penalties where a Member State fails to comply.

These procedures are commonly known as infringement proceedings or actions for failure to fulfil obligations.

Their purpose is not to compensate individual victims of unlawful national conduct, nor to punish a Member State in the ordinary criminal-law sense. They are mechanisms of objective legal enforcement. The Court of Justice of the European Union (CJEU) determines whether the State has breached an obligation arising under EU law and, where appropriate, identifies the legal consequences of that breach.

Infringement proceedings are particularly important because Member States remain responsible for implementing and applying EU law within their own constitutional and administrative systems. A Member State cannot avoid responsibility by arguing that the infringement was caused by a regional authority, an independent institution, a national court, or another public body. From the perspective of EU law, the State is responsible for compliance throughout its territory.

The enforcement system also reflects the constitutional position of the European Commission as guardian of the Treaties under Article 17(1) of the Treaty on European Union (TEU). The Commission monitors the application of EU law and has the power to initiate proceedings where it considers that a Member State has failed to comply with its obligations.

However, the Commission does not possess unlimited enforcement authority. Its decisions must operate within the procedural framework established by the Treaties, and the Court of Justice retains the judicial authority to determine whether an infringement has occurred and whether financial sanctions are justified.

2. The Legal Basis and Purpose of Infringement Proceedings

Articles 258–260 TFEU form part of the judicial enforcement system of the European Union.

Article 258 provides:

If the Commission considers that a Member State has failed to fulfil an obligation under the Treaties, it shall deliver a reasoned opinion on the matter after giving the State concerned the opportunity to submit its observations.

If the Member State does not comply with the reasoned opinion within the period specified by the Commission, the Commission may bring the matter before the Court of Justice.

Article 259 establishes a parallel possibility for proceedings initiated by one Member State against another.

Article 260 addresses the consequences of non-compliance with judgments of the Court and, in a specific category of cases, permits financial sanctions to be imposed in the first infringement judgment.

The obligations enforceable under these provisions are not limited to the literal wording of the TFEU. They include obligations arising from:

• The Treaty on European Union and the Treaty on the Functioning of the European Union.
• Regulations, directives and decisions adopted by EU institutions.
• Binding international agreements concluded by the European Union.
• General principles of EU law.
• Obligations arising from the constitutional requirements of sincere cooperation under Article 4(3) TEU.

A Member State may therefore commit an infringement through either positive action or failure to act.

Positive action may include adopting national legislation that contradicts an EU regulation, imposing restrictions incompatible with the internal market, or applying administrative rules that discriminate against persons protected by EU law.

Failure to act may involve the late transposition of a directive, failure to notify national implementing measures, failure to enforce environmental standards, or failure to take measures required by an EU legal instrument.

The procedure is concerned with the existence of an infringement, rather than the subjective intention of the State. A Member State does not generally escape responsibility by demonstrating that the breach was accidental, that its authorities acted in good faith, or that the national legislature did not intend to violate EU law.

The Court has repeatedly treated proceedings under Article 258 as a means of objectively establishing whether a Member State has fulfilled its obligations. In Commission v Italy (C-297/08), concerning waste management, the Court reiterated that the Commission must establish the alleged infringement through sufficient evidence. The procedure is not based on an assumption that a Member State is in breach merely because the Commission has expressed concern.

The system therefore combines two principles: the effectiveness of EU law and the requirement that an infringement must be established through a legally structured process.

3. Responsibility of Member States for Breaches of EU Law

A fundamental feature of infringement proceedings is that the Member State is treated as a single legal entity for the purposes of EU responsibility.

The internal distribution of constitutional powers does not ordinarily affect the State’s obligations under EU law. Whether the relevant conduct originates from the national parliament, the executive, a regional government, a local authority, an administrative agency, or a national court, the Member State remains responsible for ensuring compliance.

This principle is particularly significant in federal and decentralised constitutional systems.

For example, a Member State may have divided legislative authority between federal and regional institutions. If a directive concerns an area in which regional authorities possess legislative competence, the State must still ensure that the directive is fully transposed throughout its territory.

Similarly, where a local authority applies a national measure in a manner incompatible with EU law, the State cannot ordinarily rely on the authority’s separate administrative status to avoid responsibility.

The same principle applies to the judiciary. National courts are part of the institutional structure through which EU law is applied. A judicial practice that systematically prevents the effective enforcement of EU rights may therefore give rise to infringement proceedings.

The Court has consistently rejected arguments based on internal constitutional arrangements as a justification for non-compliance. A State cannot invoke its domestic allocation of powers, administrative difficulties, or constitutional procedures to excuse failure to fulfil an obligation imposed by EU law.

This reflects the principle of sincere cooperation under Article 4(3) TEU. Member States must take all appropriate measures to fulfil their Treaty obligations and must refrain from measures that jeopardise the attainment of the Union’s objectives.

Responsibility under Articles 258–260 is therefore international in its institutional structure but operates within the autonomous legal order of the European Union.

4. Article 258 TFEU: Proceedings Initiated by the European Commission

Article 258 TFEU establishes the principal enforcement procedure against Member States.

The Commission may initiate proceedings where it considers that a Member State has failed to fulfil an obligation under EU law. Before referring the matter to the Court of Justice, however, it must follow a preliminary administrative procedure.

This procedure gives the Member State an opportunity to respond to the allegations, explain its position, and take corrective action before judicial proceedings begin.

The ordinary process consists of three principal stages:

1. The letter of formal notice.
2. The reasoned opinion.
3. Referral to the Court of Justice.

The preliminary stages are legally significant. They are intended to clarify the dispute, define the alleged infringement, and protect the procedural rights of the Member State.

4.1. Identification of a Possible Infringement

The Commission may become aware of a possible infringement through several channels.

It may identify a problem through its own monitoring of national legislation, examination of transposition measures, review of administrative practices, or analysis of information supplied by public authorities.

Complaints from individuals, businesses, associations, professional organisations, and other interested parties may also alert the Commission to possible violations.

For example, an environmental organisation may report that a Member State is systematically failing to enforce EU waste-management requirements. A business may complain that national authorities are imposing restrictions incompatible with the freedom of establishment. An individual may identify a national administrative practice that appears inconsistent with rights conferred by an EU directive.

A complaint may provide the factual basis for an investigation, but it does not give the complainant control over the infringement procedure.

The Commission independently determines whether the information justifies further examination and whether formal proceedings should be initiated.

4.2. The Letter of Formal Notice

The first formal stage under Article 258 is the letter of formal notice.

Through this communication, the Commission identifies the suspected failure and invites the Member State to submit observations within a specified period.

The letter normally explains:

• The EU legal obligation allegedly breached.
• The national legislation, administrative practice, or omission under examination.
• The reasons why the Commission considers that the State may be in breach.
• The information or explanations requested from the Member State.
• The deadline for submitting observations.

The purpose is to provide the State with a genuine opportunity to defend its position.

The Member State may argue that the relevant national legislation correctly implements EU law, that the Commission has misunderstood the national measure, that the alleged conduct does not fall within the scope of the relevant EU provision, or that corrective measures have already been adopted.

It may also provide additional information demonstrating that the alleged infringement does not exist.

The Commission must consider the response before deciding whether to proceed. It may close the case if the explanation is satisfactory or if the problem has been resolved. Alternatively, it may conclude that the alleged breach remains and proceed to the next stage.

The letter of formal notice is not a judicial judgment and does not itself establish that the Member State has violated EU law.

It marks the beginning of the formal pre-litigation phase.

4.3. The Reasoned Opinion

If the Commission remains convinced that an infringement exists, it may issue a reasoned opinion.

The reasoned opinion is a formal statement explaining why the Commission considers that the Member State has failed to fulfil a particular obligation under EU law.

It must identify the relevant legal and factual grounds with sufficient clarity to enable the State to understand the alleged infringement and determine what measures are necessary to comply.

The reasoned opinion generally contains:

• The legal provisions considered to have been infringed.
• The conduct or omission attributed to the Member State.
• The Commission’s explanation of why that conduct is incompatible with EU law.
• The measures expected to bring the infringement to an end.
• A deadline for compliance.

The deadline is commonly around two months, although the precise period may vary according to the circumstances.

The reasoned opinion has an important procedural function because it defines the subject matter of any subsequent judicial proceedings.

The Commission cannot ordinarily bring before the Court a claim that is materially different from the infringement identified during the pre-litigation procedure. The purpose of this requirement is to ensure that the Member State has had an adequate opportunity to respond to the allegations before being brought before the Court.

The Commission must therefore maintain sufficient consistency between the letter of formal notice, the reasoned opinion, and the application initiating judicial proceedings.

The reasoned opinion is not equivalent to a binding judgment. It expresses the Commission’s legal assessment and identifies what the Commission considers necessary for compliance. The Court of Justice remains responsible for determining whether the alleged infringement has been established.

4.4. Referral to the Court of Justice

If the Member State does not comply within the period specified in the reasoned opinion, the Commission may refer the matter to the Court of Justice.

The decision to bring proceedings is discretionary. The Commission is not automatically required to refer every unresolved infringement to the Court.

It may consider the seriousness of the violation, its duration, the importance of the EU rule involved, the prospects of obtaining compliance through further dialogue, and the wider implications for the uniform application of EU law.

Most infringement cases are resolved before judicial proceedings reach the Court.

When an action is brought, the Commission must establish the alleged failure to fulfil obligations. It cannot rely solely on its own assertion that a breach has occurred.

The Member State is entitled to defend itself and to challenge the Commission’s legal and factual arguments.

The Court examines the case and determines whether the Member State has failed to fulfil the obligations identified in the application.

4.5. The Relevant Date for Assessing the Infringement

An important procedural principle concerns the date on which the Court assesses the existence of the infringement.

As a general rule, the Court examines the situation existing at the expiry of the period laid down in the reasoned opinion.

A Member State cannot ordinarily avoid a finding of infringement merely by adopting corrective measures after that deadline.

For example, if a Member State has failed to transpose a directive by the deadline specified in the reasoned opinion but adopts the necessary legislation several months later, the later legislation does not automatically eliminate the infringement for the purposes of the pending Article 258 proceedings.

The Court may still declare that the State failed to fulfil its obligations at the relevant time.

This approach preserves the legal significance of the pre-litigation procedure and prevents a Member State from treating compliance deadlines as optional.

The principle was applied in Commission v Belgium (C-543/17), where the Court examined whether the necessary transposition measures had been adopted and notified by the expiry of the relevant deadline.

5. The Commission’s Discretion to Initiate Proceedings

Although the Commission is responsible for monitoring the application of EU law, it has broad discretion in deciding whether and when to initiate infringement proceedings.

The Commission is not legally required to bring an action whenever an individual or organisation submits a complaint alleging a violation of EU law.

In Star Fruit v Commission (Case 247/87), the Court confirmed that individuals cannot compel the Commission to initiate proceedings against a Member State under the predecessor of Article 258 TFEU.

This principle has important consequences for the relationship between citizens and EU enforcement mechanisms.

An individual may submit a complaint, provide evidence, and request that the Commission investigate a national practice. However, the individual does not become a party to the infringement proceedings merely by submitting the complaint.

The Commission retains responsibility for deciding whether the matter warrants formal action.

Its discretion also concerns the timing of proceedings and the provisions of EU law on which it chooses to rely. The Court has recognised that these decisions form part of the Commission’s institutional responsibility for enforcing the Treaties.

Nevertheless, discretion does not mean that the Commission may disregard the legal framework governing its activities. Its decisions remain subject to applicable principles of EU law, including the duty to state reasons where required, equal treatment, and the proper exercise of institutional powers.

The practical distinction is important: the Commission may decide whether to pursue an infringement, but once the matter reaches the Court, the existence of the alleged violation must be established according to the applicable legal standards.

6. Article 259 TFEU: Proceedings Initiated by One Member State Against Another

Article 259 TFEU provides a second route for enforcing EU law.

It allows a Member State that considers another Member State to have failed to fulfil an obligation under the Treaties to bring proceedings before the Court of Justice.

This mechanism recognises that compliance with EU law is not solely a matter between the Commission and individual Member States. Every Member State has an interest in the proper functioning of the Union’s legal order.

However, Article 259 establishes a special preliminary procedure.

Before bringing an action against another Member State, the applicant State must refer the matter to the Commission.

The Commission then gives both Member States an opportunity to submit their cases and observations, orally and in writing.

6.1. The Role of the Commission

The Commission’s involvement serves an important institutional purpose.

It provides an opportunity for the dispute to be examined through the Union’s central enforcement institution before judicial proceedings begin.

The Commission must deliver a reasoned opinion after the parties have been given the opportunity to present their positions.

However, the Treaty establishes an important safeguard: if the Commission has not delivered its opinion within three months from the date on which the matter was brought before it, the absence of an opinion does not prevent the applicant Member State from bringing the case before the Court.

This prevents the Commission’s failure to complete its preliminary examination from indefinitely blocking proceedings between Member States.

6.2. The Nature of Inter-State Infringement Proceedings

Proceedings under Article 259 are relatively uncommon compared with actions brought by the Commission under Article 258.

There are several reasons for this.

First, Member States may prefer to resolve disagreements through diplomatic negotiations or institutional dialogue.

Second, proceedings against another Member State may have significant political and economic consequences.

Third, the Commission’s involvement in monitoring EU law means that many disputes can be addressed through the ordinary infringement procedure.

Nevertheless, Article 259 is an important constitutional safeguard. It ensures that the enforcement of EU law does not depend entirely on the Commission’s willingness to act.

It also confirms that Member States are not merely passive recipients of EU obligations. They have a legal interest in ensuring that other States respect the common rules.

6.3. Relationship Between Articles 258 and 259

The two procedures pursue the same fundamental objective but differ in their institutional structure.

Under Article 258, the Commission acts in its capacity as guardian of the Treaties.

Under Article 259, a Member State brings proceedings against another Member State after first referring the dispute to the Commission.

In both cases, the Court determines whether the defendant State has failed to fulfil an obligation under EU law.

Article 259 is therefore not an appeal against a Commission decision. It is an independent Treaty-based mechanism of judicial enforcement.

7. The Proceedings Before the Court of Justice

Once an action has been brought under Article 258 or Article 259, the dispute enters the judicial phase.

The proceedings are conducted under the Statute of the Court of Justice and the Rules of Procedure of the Court of Justice.

The applicant identifies the alleged infringement and the legal provisions on which the action is based. The defendant Member State may submit a defence disputing the facts, the interpretation of EU law, or the legal conclusions advanced by the applicant.

The proceedings may include written observations and, where appropriate, an oral hearing.

The Court examines the evidence and arguments and determines whether the relevant obligations have been fulfilled.

7.1. Burden of Proof

The applicant bears the responsibility of establishing the alleged infringement.

In proceedings under Article 258, the Commission must provide the Court with the evidence necessary to establish that the Member State has failed to fulfil its obligations.

It cannot simply presume that an infringement exists.

In Commission v Italy (C-297/08), concerning waste management in the Campania region, the Court reiterated that the Commission must establish the alleged failure through sufficient evidence.

The precise nature of the evidence depends on the type of infringement.

Where the allegation concerns the adoption of incompatible legislation, the Commission may rely on the relevant national provisions and their legal effects.

Where the allegation concerns administrative practices, the Commission may need to demonstrate that the conduct is sufficiently established and not merely an isolated or unrepresentative incident.

In cases involving environmental enforcement, public procurement, or the application of complex administrative rules, the Commission may rely on reports, official statistics, inspection findings, national authorities’ communications, and other relevant material.

The evidential requirements must be assessed in the context of the particular obligation being enforced.

7.2. The Member State’s Defence

The defendant State may challenge the Commission’s interpretation of EU law, dispute the factual allegations, or argue that it has fulfilled the relevant obligation.

However, certain arguments cannot ordinarily excuse non-compliance.

A Member State cannot generally rely on:

• Internal constitutional or administrative difficulties.
• The division of powers between national and regional authorities.
• The failure of its parliament to adopt legislation in time.
• Financial or administrative inconvenience.
• Political disagreement with the EU measure.
• The conduct of private persons as a justification for failing to exercise the powers required by EU law.

The Court has consistently treated EU obligations as binding on the Member State as a whole.

Where a directive requires transposition, the State must ensure that the necessary legal measures are adopted within the prescribed period. Difficulties within the national legislative process do not suspend the obligation.

7.3. The Court’s Judgment

If the Court finds that the Member State has failed to fulfil its obligations, it delivers a judgment declaring the infringement.

The judgment does not ordinarily prescribe the exact national legislative or administrative measures that must be adopted. Instead, it establishes the legal failure and requires the Member State to take the necessary steps to comply.

The State remains responsible for choosing the appropriate means of implementation, provided that those measures genuinely bring the infringement to an end.

A judgment under Article 258 or Article 259 is binding. It is not a political recommendation or an advisory opinion.

The Member State must take the necessary measures to comply, as expressly required by Article 260(1) TFEU.

8. Article 260(1) TFEU: The Obligation to Comply with the Judgment

Article 260(1) TFEU establishes the legal consequences of a judgment finding that a Member State has failed to fulfil its obligations.

It provides that the State must take the necessary measures to comply with the judgment of the Court.

This obligation is distinct from the original obligation that was breached.

The first infringement judgment establishes that the Member State failed to fulfil its obligations under EU law. Article 260(1) then requires the State to act on that judgment and bring the situation into conformity with EU law.

The necessary measures depend on the nature of the infringement.

If the breach concerns incompatible legislation, the State may need to amend or repeal the relevant national provisions.

If the infringement concerns failure to transpose a directive, the State must adopt and notify the necessary transposition measures.

If the breach concerns an administrative practice, the State may need to change its procedures, issue instructions to public authorities, or establish effective enforcement mechanisms.

If the infringement concerns a failure to protect the environment, the State may need to introduce operational measures, improve monitoring, or ensure that relevant infrastructure and administrative systems comply with EU requirements.

Article 260(1) does not automatically impose a financial penalty. Its immediate effect is to establish a binding obligation to comply with the Court’s judgment.

Financial sanctions become relevant where the State continues to disregard its obligations under the conditions established by Article 260(2) or Article 260(3).

9. Article 260(2) TFEU: Financial Penalties for Failure to Comply with a Judgment

Article 260(2) establishes the principal mechanism for imposing financial sanctions on a Member State that fails to comply with an earlier judgment of the Court.

Where the Commission considers that the Member State has not taken the necessary measures to comply, it may bring the case before the Court again.

Before doing so, the Commission must give the State an opportunity to submit its observations.

Unlike the original Article 258 procedure, Article 260(2) does not require a new reasoned opinion in the same form as the first infringement procedure.

The essential question is whether the Member State has complied with the earlier judgment.

If the Court finds that the State has not done so, it may impose:

• A lump sum payment.
• A periodic penalty payment.
• Both a lump sum and a periodic penalty payment.

The distinction between the two forms of financial sanction is important.

9.1. Lump Sum Payment

A lump sum is a fixed financial amount imposed to address the failure to comply with EU law.

It reflects the seriousness and duration of the infringement and the need to ensure that the authority of the Court’s judgment is respected.

A lump sum may be justified even where the Member State has taken corrective action during the second proceedings, because the State’s previous failure to comply may have continued for a substantial period.

Its function is not limited to compelling future compliance. It also reflects the importance of responding to an established period of non-compliance.

9.2. Periodic Penalty Payment

A periodic penalty payment is intended to encourage the Member State to comply with the judgment as quickly as possible.

It may be imposed as a daily, weekly, or other periodic amount, depending on the terms of the Court’s decision.

The payment generally continues for as long as the infringement remains unresolved, subject to the conditions specified in the judgment.

Its principal purpose is coercive rather than compensatory.

The financial consequence increases the practical cost of continued non-compliance and provides an incentive for the State to take the necessary corrective measures.

9.3. Both Forms of Sanction May Be Imposed

The Court may impose both a lump sum and a periodic penalty payment in the same case.

The two sanctions serve different purposes and are not mutually exclusive.

A lump sum addresses the seriousness and duration of the infringement that has already occurred, while a periodic penalty payment seeks to secure future compliance.

In Commission v France (C-304/02), concerning the enforcement of fisheries control obligations, the Court imposed both a lump sum and a periodic penalty payment following France’s failure to comply with an earlier judgment.

The case established an important precedent for the use of combined financial sanctions under the predecessor of Article 260(2).

9.4. Determining the Amount of Financial Sanctions

The Commission proposes the financial sanctions it considers appropriate when referring the case to the Court.

However, the Court retains the judicial authority to determine whether a penalty should be imposed and, under Article 260(2), to determine its amount.

The Commission’s calculations are based on criteria intended to ensure that sanctions are proportionate, effective, and sufficiently deterrent.

Relevant considerations include:

• The seriousness of the infringement.
• The importance of the EU rules that have been breached.
• The impact of the infringement on public and private interests.
• The duration of non-compliance.
• The Member State’s ability to pay.
• The need to ensure that the penalty has a genuine deterrent effect.

The importance of the obligation breached is particularly relevant. A failure affecting fundamental principles of EU law or producing substantial harm to public interests may justify a different assessment from a technical or limited infringement.

The duration of non-compliance also matters. A Member State that continues to disregard a judgment for several years may face a more substantial financial consequence than a State that resolves the problem shortly after proceedings begin.

The Court is not mechanically bound by the Commission’s proposed calculation under Article 260(2). It must exercise its own judicial assessment.

10. Article 260(3) TFEU: Financial Sanctions for Failure to Notify Directive Transposition Measures

Article 260(3) introduces a significant exception to the ordinary two-stage enforcement system.

Under the general structure of Article 260(2), financial sanctions are imposed only after the Court has delivered an initial infringement judgment and the Member State has subsequently failed to comply with it.

Article 260(3) allows the Commission to request financial sanctions in the first infringement proceedings where the Member State has failed to fulfil its obligation to notify measures transposing a directive adopted under a legislative procedure.

The provision was introduced by the Treaty of Lisbon to strengthen enforcement of the obligation to transpose legislative directives within the prescribed deadlines.

The practical importance is considerable. A Member State that fails to notify the necessary transposition measures may face a financial penalty without waiting for a second infringement judgment.

10.1. Conditions for Applying Article 260(3)

Article 260(3) is not a general mechanism for imposing financial penalties whenever a directive has been incorrectly implemented.

Its application is limited to failure to fulfil the obligation to notify measures transposing a directive adopted under a legislative procedure.

The distinction between non-notification and incorrect transposition is important.

Article 260(3) addresses the obligation to provide sufficiently clear and precise information about the measures adopted to transpose the directive.

The Court clarified the scope of this provision in Commission v Belgium (C-543/17).

Belgium had failed to fully transpose Directive 2014/61/EU concerning measures to reduce the cost of deploying high-speed electronic communications networks. The failure included the absence of necessary measures for the Brussels-Capital Region.

The Court held that the obligation to notify measures transposing a directive requires Member States to provide sufficiently clear and precise information identifying the national provisions that transpose the directive.

The State must therefore make it possible to identify which national measures correspond to the obligations contained in the directive.

The judgment also clarified that Article 260(3) is not intended to transform every disagreement over the quality of transposition into a case for immediate financial sanctions. The provision concerns the failure to notify the relevant transposition measures, including situations in which the notification is incomplete in the manner established by the Court.

10.2. The Commission’s Request for Financial Sanctions

When bringing an action under Article 258 on the grounds covered by Article 260(3), the Commission may specify the amount of the lump sum or penalty payment it considers appropriate.

The Court may impose a financial penalty if it finds that an infringement has occurred.

However, Article 260(3) establishes a specific limitation: the penalty imposed by the Court cannot exceed the amount specified by the Commission.

This differs from Article 260(2), under which the Court exercises its own discretion in determining the amount of the financial sanction.

The Court remains responsible for deciding whether an infringement exists and whether a penalty is justified. It must also provide reasons for the financial sanction imposed.

10.3. Commission v Romania and Commission v Ireland

The Court further clarified the application of Article 260(3) in Commission v Romania (C-549/18) and Commission v Ireland (C-550/18), both concerning the failure to notify measures transposing the anti-money laundering framework.

These judgments confirmed that the Commission has discretion to decide whether to request financial sanctions under Article 260(3).

They also addressed the relationship between the Commission’s proposed penalty and the Court’s authority to impose it.

The Commission must provide an adequate explanation of the nature and amount of the penalty requested. Its calculation methods contribute to transparency and predictability, although the Court retains its judicial responsibility under the Treaty.

Article 260(3) therefore strengthens enforcement while preserving the distinction between the Commission’s role in bringing proceedings and the Court’s role in adjudicating them.

11. The Difference Between Articles 260(2) and 260(3)

Although both provisions permit financial sanctions, they address different procedural situations.

Article 260(2) applies where a Member State has failed to comply with an earlier judgment of the Court.

Article 260(3) applies in a defined category of first-instance infringement proceedings concerning failure to notify measures transposing a directive adopted under a legislative procedure.

The distinction may be summarised as follows:

Article 260(2):

• Requires an earlier judgment finding an infringement.
• Applies where the Member State has failed to take the measures necessary to comply with that judgment.
• Requires the Commission to give the State an opportunity to submit observations before the second referral.
• Allows the Court to impose a lump sum, a periodic penalty payment, or both.
• Leaves the Court with discretion to determine the appropriate financial sanction.

Article 260(3):

• Operates within the first infringement proceedings under Article 258.
• Concerns failure to notify measures transposing a directive adopted under a legislative procedure.
• Allows the Commission to request a financial sanction in the initial action.
• Permits the Court to impose a lump sum or periodic penalty payment.
• Limits the amount imposed to the maximum specified by the Commission.

The distinction is essential for understanding the enforcement architecture of the Treaties. Article 260(2) protects the authority of judgments already delivered by the Court. Article 260(3) addresses a specific failure that can undermine the timely and transparent implementation of EU legislative acts.

12. The Principle of Sincere Cooperation and the Duty of Compliance

Infringement proceedings are closely connected to the principle of sincere cooperation established by Article 4(3) TEU.

This provision requires the Union and the Member States to assist each other in carrying out the tasks arising from the Treaties.

Member States must take appropriate measures to fulfil their EU obligations and refrain from measures that could jeopardise the Union’s objectives.

In the context of infringement proceedings, sincere cooperation has several practical consequences.

First, Member States must provide the Commission with relevant information when required to demonstrate compliance with EU obligations.

Second, national authorities must cooperate during the pre-litigation procedure and respond to the Commission’s requests in good faith.

Third, following a judgment of the Court, the State must take effective measures to eliminate the infringement rather than merely adopt formal or superficial changes.

Fourth, national authorities must ensure that compliance is achieved throughout the State’s territory and across all relevant administrative levels.

The duty of sincere cooperation also explains why internal constitutional difficulties cannot generally justify non-compliance.

A State may organise its institutions according to its own constitutional traditions, but it must ensure that this organisation does not prevent the fulfilment of obligations arising under EU law.

The relationship between sincere cooperation and infringement proceedings demonstrates that the EU legal order depends on both judicial enforcement and continuing cooperation between national and Union institutions.

13. Infringement Proceedings and the Rights of Individuals

Infringement proceedings are initiated by the Commission or, under Article 259, by another Member State. Individuals and businesses cannot themselves bring an action under Articles 258–260.

Nevertheless, infringement proceedings may have significant consequences for individuals.

A successful action may require a Member State to amend national legislation, change administrative practices, improve environmental protection, ensure equal treatment, or implement rights conferred by EU directives.

For example, proceedings concerning discrimination may lead to amendments in national employment legislation. Proceedings concerning environmental obligations may require improvements in waste management or pollution control. Proceedings concerning consumer protection may result in changes to national enforcement mechanisms.

However, the procedure does not ordinarily provide an individual with compensation for damage suffered as a result of the infringement.

This distinction separates infringement proceedings from other forms of judicial protection available under EU law.

Individuals may, depending on the circumstances, rely on directly effective provisions of EU law before national courts. They may also invoke national remedies, seek judicial review of administrative decisions, or claim damages under the principles of Member State liability established by the Court of Justice.

The principle of State liability was developed in Francovich and Bonifaci (Joined Cases C-6/90 and C-9/90). It establishes that a Member State may be required to compensate individuals for damage caused by breaches of EU law where the relevant conditions are satisfied.

Infringement proceedings and State liability therefore serve different purposes.

The former protect the objective application of EU law and establish the responsibility of the Member State. The latter may provide compensation to individuals who have suffered damage as a result of an infringement.

A Commission action does not automatically establish an individual’s entitlement to damages, just as an individual’s successful national claim does not automatically require the Commission to initiate infringement proceedings.

14. Relationship Between Infringement Proceedings and Preliminary References

Infringement proceedings under Articles 258–260 must also be distinguished from preliminary references under Article 267 TFEU.

The two procedures serve complementary functions within the judicial system of the European Union.

Under Article 267, a national court may refer questions concerning the interpretation or validity of EU law to the Court of Justice. The objective is to ensure the correct and uniform interpretation of EU law in national proceedings.

Under Articles 258–260, the Court determines whether a Member State has failed to fulfil an obligation under EU law and, where appropriate, addresses the consequences of that failure.

The distinction concerns both the subject matter and the procedural participants.

A preliminary reference arises within national judicial proceedings and is based on cooperation between a national court and the Court of Justice.

An infringement action is brought directly before the Court by the Commission or another Member State and concerns the responsibility of the defendant State.

Nevertheless, the procedures may be connected.

A preliminary ruling may clarify the meaning of an EU provision that later becomes relevant in infringement proceedings. Similarly, an infringement judgment may influence the interpretation and application of national law by domestic courts.

The existence of a preliminary ruling does not automatically eliminate the possibility of infringement proceedings. Nor does the initiation of infringement proceedings prevent national courts from making preliminary references where the conditions of Article 267 are satisfied.

Together, the procedures support the uniformity and effectiveness of EU law through different forms of judicial cooperation and enforcement.

15. Practical Examples of Infringement Proceedings

The operation of Articles 258–260 becomes clearer when considered through practical examples.

Example 1: Failure to Transpose a Directive

An EU directive requires Member States to adopt national legislation by a specified deadline.

One Member State fails to adopt the necessary legislation.

The Commission identifies the omission and sends a letter of formal notice. The State responds that the legislative process is still ongoing.

The Commission considers the explanation insufficient and issues a reasoned opinion requiring compliance within a specified period.

If the State still fails to notify the necessary measures, the Commission may bring proceedings under Article 258 and, where the conditions are satisfied, request financial sanctions under Article 260(3).

The Court may declare that the State has failed to fulfil its obligations and impose a financial penalty within the limits established by Article 260(3).

Example 2: Incorrect National Legislation

A Member State adopts legislation that restricts the freedom of establishment in a manner incompatible with the Treaties.

The Commission examines the legislation and concludes that the restriction cannot be justified under EU law.

Following the preliminary procedure, the Commission brings an action under Article 258.

If the Court finds an infringement, the State must amend or repeal the incompatible provisions.

If the State subsequently fails to comply with the judgment, the Commission may initiate proceedings under Article 260(2) and request financial sanctions.

Example 3: Persistent Environmental Non-Compliance

A Member State repeatedly fails to comply with EU obligations concerning waste disposal and environmental protection.

The Commission investigates the administrative practices and collects evidence demonstrating that the national system does not meet the requirements of EU law.

The Court finds that the State has failed to fulfil its obligations.

The State is required to introduce effective corrective measures. If it continues to disregard the judgment, the Commission may return to the Court under Article 260(2).

Depending on the circumstances, the Court may impose a lump sum, a periodic penalty payment, or both.

Example 4: A Dispute Between Two Member States

One Member State considers that another State has introduced national measures incompatible with the free movement of goods.

The applicant State first brings the matter before the Commission under Article 259.

The Commission gives both States an opportunity to submit their observations.

If the Commission does not deliver a reasoned opinion within three months, the applicant State may nevertheless bring the matter before the Court.

The Court then determines whether the defendant State has breached its obligations under EU law.

These examples demonstrate that infringement proceedings are not confined to legislative failures. They may concern the full range of obligations imposed by the EU legal order.

16. Institutional and Constitutional Significance of Infringement Proceedings

Articles 258–260 perform a function that extends beyond the resolution of individual disputes.

They preserve the legal unity of the European Union by ensuring that Member States remain subject to common obligations and that violations can be addressed through a central judicial mechanism.

The system is particularly important because the European Union does not possess a single central administration responsible for implementing every EU measure.

Instead, much of EU law is applied through national parliaments, governments, administrative authorities, courts, and regulatory institutions.

This decentralised structure makes enforcement essential.

Without a mechanism for addressing national failures, the application of EU law could become inconsistent across Member States. Common legal rules might exist formally but produce substantially different results in practice.

Infringement proceedings help prevent that outcome by providing a means of establishing responsibility and requiring corrective action.

The system also reflects the institutional balance between the Commission and the Court of Justice.

The Commission identifies possible infringements, conducts the preliminary procedure, and decides whether to initiate judicial proceedings. The Court independently determines whether the Member State has breached EU law and whether the conditions for financial sanctions have been satisfied.

The Commission is therefore not a judicial authority, and its reasoned opinions do not replace judgments of the Court.

Likewise, the Court does not ordinarily initiate infringement proceedings on its own initiative. It exercises judicial authority within the cases brought before it.

This division of responsibilities supports both the effectiveness of EU enforcement and the principle that legal responsibility must be established through judicial proceedings.

17. Limitations and Challenges of the Enforcement System

Despite its importance, the infringement procedure has practical limitations.

17.1. Dependence on Commission Priorities

Because the Commission enjoys discretion over the initiation and timing of proceedings, not every alleged infringement results in judicial action.

This is unavoidable to some extent. The Commission must allocate its resources and consider the broader priorities of enforcing EU law.

However, it also means that individuals and organisations cannot assume that a complaint will lead to a formal infringement action.

17.2. Duration of Proceedings

Infringement proceedings may take considerable time.

The Commission must investigate the facts, communicate with the Member State, examine its observations, and determine whether judicial proceedings are appropriate.

If the case reaches the Court, the judicial process adds another stage.

The duration may be particularly significant where the infringement concerns environmental damage, public health, or other matters in which delay can produce continuing consequences.

17.3. Dependence on National Implementation

Even after a judgment has been delivered, the practical correction of the infringement depends substantially on national authorities.

The Court establishes the legal obligation to comply, but the Member State must adopt the necessary legislation, administrative measures, or institutional changes.

The effectiveness of the system therefore depends on the willingness and capacity of national institutions to implement judgments.

17.4. Financial Penalties Do Not Replace Compliance

Financial sanctions increase the cost of non-compliance, but they do not themselves correct the underlying violation.

A Member State may be required to pay a substantial penalty while the infringement continues.

The central objective remains the restoration of compliance with EU law. Financial sanctions are instruments for securing that objective and protecting the authority of the Treaties and the Court’s judgments.

18. Key Takeaways

• Articles 258–260 TFEU establish the principal judicial mechanisms for enforcing EU law against Member States.
• Article 258 allows the European Commission to initiate infringement proceedings.
• The ordinary Article 258 procedure involves a letter of formal notice, a reasoned opinion, and possible referral to the Court of Justice.
• The Commission has broad discretion to decide whether and when to bring infringement proceedings.
• Article 259 allows one Member State to bring proceedings against another, after first referring the matter to the Commission.
• Member States remain responsible for infringements committed by their national, regional, local, administrative, or judicial authorities.
• The applicant must establish the alleged infringement through sufficient evidence.
• Under Article 260(1), a Member State must take the necessary measures to comply with a judgment finding an infringement.
• Article 260(2) allows the Court to impose a lump sum, a periodic penalty payment, or both where a Member State fails to comply with an earlier judgment.
• Article 260(3) permits financial sanctions in the first infringement proceedings for failure to notify measures transposing a directive adopted under a legislative procedure.
• Infringement proceedings protect the objective application of EU law but do not ordinarily provide individual compensation.
• Individuals may use national remedies and, where the relevant conditions are met, rely on the principle of Member State liability for damage caused by breaches of EU law.

19. Frequently Asked Questions

1. What are infringement proceedings under EU law?

Infringement proceedings are judicial procedures through which the European Commission or, in certain circumstances, one Member State may bring an action against another Member State for failing to fulfil obligations under EU law. They are governed principally by Articles 258–260 TFEU.

2. Who can initiate infringement proceedings against a Member State?

The European Commission may initiate proceedings under Article 258 TFEU. Another Member State may bring proceedings under Article 259, provided that it first refers the matter to the Commission. Individuals and businesses cannot directly initiate infringement proceedings before the Court of Justice.

3. Can an individual submit a complaint to the European Commission?

Yes. Individuals, businesses, and organisations may submit complaints concerning possible violations of EU law. However, a complaint does not oblige the Commission to initiate formal proceedings. The Commission retains discretion over whether to investigate and pursue the matter.

4. What is the difference between a letter of formal notice and a reasoned opinion?

A letter of formal notice identifies the suspected infringement and invites the Member State to submit observations. A reasoned opinion is the Commission’s formal explanation of why it considers that an infringement exists and what measures are required to bring it to an end.

5. What happens if a Member State ignores a reasoned opinion?

The Commission may refer the matter to the Court of Justice under Article 258 TFEU. The Court then determines whether the Member State has failed to fulfil its obligations.

6. Can the Commission impose a fine directly on a Member State?

No. The Commission may propose financial sanctions in the circumstances provided by Article 260, but the Court of Justice is responsible for imposing them. The Commission cannot independently impose the Treaty penalties provided for under Article 260.

7. What financial penalties can the Court impose?

Under Article 260(2), the Court may impose a lump sum, a periodic penalty payment, or both. Under Article 260(3), it may impose a lump sum or periodic penalty payment in qualifying cases involving failure to notify measures transposing a directive adopted under a legislative procedure.

8. What is the difference between Article 260(2) and Article 260(3)?

Article 260(2) concerns failure to comply with an earlier judgment of the Court. Article 260(3) allows financial sanctions in the first infringement proceedings where a Member State has failed to fulfil the specified obligation to notify measures transposing a directive adopted under a legislative procedure.

9. Can a Member State rely on its constitution to justify non-compliance with EU law?

Generally, no. A Member State cannot ordinarily invoke its internal constitutional arrangements, division of powers, or administrative difficulties as a justification for failing to fulfil obligations imposed by EU law.

10. Do infringement proceedings compensate individuals who have suffered damage?

Not ordinarily. Their purpose is to establish and address a Member State’s failure to fulfil EU obligations. Individuals seeking compensation may, where the relevant conditions are satisfied, rely on national remedies and the principle of State liability established in Francovich and Bonifaci.

11. Does a judgment under Article 258 automatically result in a financial penalty?

No. The initial judgment ordinarily establishes the infringement and requires the Member State to comply. Financial sanctions may follow under Article 260(2) if the State fails to comply with that judgment, or under Article 260(3) in the specific category of cases covered by that provision.

12. Can a Member State bring proceedings against another Member State without the Commission’s approval?

Yes, but it must first refer the matter to the Commission under Article 259. If the Commission does not deliver a reasoned opinion within three months, the applicant State may still bring the case before the Court.

20. Conclusion

Infringement proceedings are an essential component of the constitutional and judicial structure of the European Union. They ensure that the obligations arising from the Treaties and secondary legislation are not merely formal commitments but enforceable legal requirements.

Articles 258–260 establish a carefully structured system. The Commission monitors compliance and may initiate proceedings; Member States may, in defined circumstances, challenge the conduct of other States; and the Court of Justice determines whether an infringement has occurred and what consequences follow from continued non-compliance.

The distinction between the three provisions is fundamental. Article 258 establishes the ordinary Commission-led procedure, Article 259 provides a mechanism for inter-State enforcement, and Article 260 ensures that judgments are implemented through binding obligations and, where necessary, financial sanctions.

The deeper constitutional significance of this framework lies in the relationship between national sovereignty and the obligations of membership. Member States retain their own constitutional institutions and administrative structures, but they must exercise their powers consistently with the legal commitments arising from EU membership.

Infringement proceedings provide the means through which that principle is judicially protected. They preserve the authority of EU law, support its uniform application, and ensure that the failure of a Member State to fulfil its obligations can ultimately be addressed through the Court of Justice.

21. Primary Legal Sources and Further Reading

Treaty Provisions

• Article 4 TEU – Principle of sincere cooperation
• Article 17 TEU – The European Commission
• Article 258 TFEU – Proceedings initiated by the Commission
• Article 259 TFEU – Proceedings initiated by a Member State
• Article 260 TFEU – Compliance with judgments and financial sanctions
• Article 267 TFEU – Preliminary references

Leading Court of Justice Decisions

• Star Fruit v Commission, Case 247/87 – Commission discretion and the inability of individuals to compel the initiation of infringement proceedings.
• Commission v France, Case C-304/02 – Combined lump sum and periodic penalty payment for failure to comply with an earlier judgment.
• Commission v Italy, Case C-297/08 – Evidential requirements in proceedings for failure to fulfil obligations.
• Commission v Belgium, Case C-543/17 – Interpretation and application of Article 260(3) concerning notification of directive transposition measures.
• Commission v Romania, Case C-549/18 – Application of Article 260(3) and the Commission’s discretion to request financial sanctions.
• Commission v Ireland, Case C-550/18 – Failure to notify transposition measures and financial sanctions under Article 260(3).
• Francovich and Bonifaci, Joined Cases C-6/90 and C-9/90 – Member State liability for damage caused by breaches of EU law.

Institutional Resources

• European Commission – Infringement Procedure – Explanation of the stages of infringement proceedings and the Commission’s enforcement activities.
• European Commission – Financial Sanctions – Principles governing the calculation and proposal of financial sanctions.
• EUR-Lex – Enforcement of EU Law – Overview of the mechanisms for ensuring compliance with EU law.
• European Parliament – Competences of the Court of Justice of the European Union – Institutional overview of the Court’s jurisdiction and infringement proceedings.