The Institutional Framework of the European Union: Powers, Responsibilities, and Institutional Balance

The Institutional Framework of the European Union: Powers, Responsibilities, and Institutional Balance

Introduction

The European Union is built upon an institutional structure that reflects its distinctive constitutional character. It is neither a traditional international organisation operating exclusively through cooperation between sovereign states nor a federal state possessing a single government with comprehensive legislative, executive, and judicial authority. Instead, it is a supranational legal and political order in which powers are distributed among institutions representing different interests, exercising different functions, and operating within a framework established by the founding Treaties.

The institutional framework of the European Union is central to understanding how European integration works in practice. It determines who may propose legislation, who adopts it, who implements it, who supervises compliance with EU law, and who ultimately interprets the meaning of the Treaties. It also establishes the mechanisms through which the interests of Member States, European citizens, and the Union as a whole are represented in the decision-making process.

At the heart of this structure lies a fundamental constitutional principle: institutional balance. No EU institution possesses unlimited authority. Each institution must exercise its powers within the limits established by the Treaties, respect the powers conferred upon the others, and cooperate with them where the legal framework requires. The institutional system therefore combines the separation of functions with structured cooperation rather than reproducing the strict separation of powers traditionally associated with national constitutional systems.

The principal institutions are identified in Article 13 of the Treaty on European Union (TEU): the European Parliament, the European Council, the Council of the European Union, the European Commission, the Court of Justice of the European Union, the European Central Bank, and the Court of Auditors. Each has a distinct constitutional position, although their responsibilities frequently intersect.

Understanding these institutions requires examining not merely their individual competences but also the relationships between them. The legislative process, for example, cannot be understood by studying the European Parliament or the Council in isolation. It involves the Commission’s right of legislative initiative, the Parliament’s democratic representation, the Council’s representation of national governments, and the procedural rules governing their cooperation.

Similarly, the executive dimension of EU governance is not concentrated in a single institution. The Commission performs important executive and supervisory functions, the European Council provides political direction, the Council exercises coordinating and decision-making responsibilities, and national administrations play a substantial role in implementing Union legislation.

The institutional framework consequently reflects the central constitutional challenge of the European Union: how to exercise common authority while preserving democratic legitimacy, respect for national constitutional structures, the rule of law, and the principle that the Union may act only within the competences conferred upon it.

1. The Constitutional Foundations of the EU Institutional System

1.1. Article 13 TEU: Establishing the Institutional Framework

The primary legal foundation of the European Union’s institutional structure is Article 13 TEU. It establishes both the composition and the constitutional purpose of the Union’s institutional framework.

According to Article 13(1), the institutional framework must promote the Union’s values, advance its objectives, serve the interests of the Union, its citizens and its Member States, and ensure the consistency, effectiveness and continuity of its policies and actions.

This provision is important because it establishes that the institutions do not exist merely as administrative organisations. They are constitutional organs of a legal order whose functions are directed towards achieving the objectives of the Treaties.

Article 13 identifies seven institutions:

1. The European Parliament.
2. The European Council.
3. The Council of the European Union.
4. The European Commission.
5. The Court of Justice of the European Union.
6. The European Central Bank.
7. The European Court of Auditors.

The inclusion of these seven bodies reflects the different dimensions of European governance. Some institutions participate directly in political decision-making, others exercise executive, judicial, monetary or financial supervisory functions.

It is equally important to distinguish the seven institutions from the numerous other bodies, agencies and offices operating within the EU system. The European Economic and Social Committee and the European Committee of the Regions, for example, participate in the institutional process through advisory functions, but they are not institutions within the meaning of Article 13.

The distinction is legally significant. The status, powers and responsibilities of an EU institution derive directly from the Treaties, whereas the authority of agencies and other bodies is generally established through secondary legislation or specific Treaty provisions.

Article 13(2) introduces two particularly important constitutional requirements:

• Every institution must act within the limits of the powers conferred upon it by the Treaties and in accordance with the procedures, conditions and objectives established therein.
• The institutions must practise mutual sincere cooperation.

These requirements establish the legal boundaries within which the institutional system operates.

The first prevents institutional overreach. The second recognises that the Union’s objectives cannot ordinarily be achieved through isolated institutional activity. European governance depends upon cooperation between bodies that possess different powers and represent different interests.

The complete provision can be consulted in the Treaty on European Union, Article 13.

1.2. The Principle of Conferral and Institutional Competence

The institutional framework must be understood in conjunction with the principle of conferral, established in Article 5 TEU.

Under this principle, the Union may act only within the competences conferred upon it by the Member States through the Treaties. Competences not conferred upon the Union remain with the Member States.

The principle has two dimensions.

First, it determines the substantive limits of EU authority. The Union cannot legislate or adopt binding measures in an area merely because a particular policy would be politically desirable or administratively convenient. There must be an appropriate legal basis in the Treaties.

Second, it determines the authority of individual institutions. Even where the Union possesses competence in a particular policy area, the institution exercising that competence must act within the specific powers and procedures assigned to it.

For example, the fact that the Union has competence to legislate on environmental protection does not mean that the European Commission may independently adopt any environmental legislation it considers appropriate. The Commission must respect its right of initiative, the applicable legislative procedure, the powers of the European Parliament and Council, and the limits of any delegated or implementing authority.

Institutional competence is therefore distinct from Union competence.

Union competence answers the question of whether the European Union may act in a particular field. Institutional competence answers the question of which institution may exercise a particular function, and under what legal conditions.

This distinction is fundamental to the constitutional organisation of the EU.

It also explains why institutional disputes frequently concern the correct interpretation of legal bases, procedural requirements and the boundaries between institutional responsibilities.

1.3. The Relationship Between Articles 5 and 13 TEU

Articles 5 and 13 TEU operate together.

Article 5 determines the limits of the Union’s authority in relation to the Member States. Article 13 determines the limits of institutional authority within the Union itself.

Consequently, the institutional system is subject to two complementary constitutional restrictions:

• The Union cannot exercise powers that have not been conferred upon it.
• An EU institution cannot exercise powers that the Treaties have assigned to another institution or have not conferred upon it.

This arrangement prevents the concentration of authority and protects the constitutional distribution of responsibilities.

It also provides the legal foundation for judicial review of institutional action. If an institution exceeds its competence, disregards a mandatory procedure or interferes with the powers of another institution, its conduct may be challenged before the Court of Justice of the European Union.

2. The European Parliament: Democratic Representation and Legislative Authority

The European Parliament represents the citizens of the European Union and constitutes the principal channel through which democratic representation is incorporated into the Union’s legislative and political processes.

Its constitutional position is established primarily by Article 14 TEU and further developed in the Treaty on the Functioning of the European Union (TFEU).

Unlike most other EU institutions, Parliament is directly elected by European citizens. Members of the European Parliament (MEPs) are elected for five-year terms through elections conducted in the Member States under the applicable European and national electoral rules.

Representation is based on the principle of degressive proportionality. Larger Member States receive more seats than smaller ones, but smaller states receive more seats per capita. This arrangement attempts to reconcile the principle of equal political representation with the demographic differences between Member States.

2.1. Legislative Functions

Article 14(1) TEU provides that Parliament exercises legislative and budgetary functions jointly with the Council, as well as political control and consultation functions established by the Treaties.

Its legislative role has expanded considerably through successive Treaty reforms.

Under the ordinary legislative procedure, Parliament and the Council act as co-legislators. Neither can ordinarily adopt the proposed legislation without the agreement of the other.

Parliament examines Commission proposals, debates their provisions, proposes amendments and participates in negotiations with the Council.

The procedure gives the directly elected institution an essential role in determining the content of EU legislation.

However, Parliament does not possess a general autonomous legislative initiative equivalent to that of many national parliaments. Under Article 17(2) TEU, legislative acts are generally adopted on the basis of a Commission proposal, except where the Treaties provide otherwise.

Parliament may request the Commission to submit a proposal under Article 225 TFEU. If the Commission declines, it must inform Parliament of its reasons.

This arrangement illustrates the institutional division between legislative representation and legislative initiative.

2.2. Budgetary Powers

Parliament shares budgetary authority with the Council.

Under Article 314 TFEU, both institutions participate in the adoption of the annual EU budget. The procedure includes the submission of a draft budget by the Commission, examination by the Council and Parliament, and mechanisms for resolving disagreements.

Parliament’s budgetary role is not limited to approving expenditure. It also participates in determining the financial priorities of the Union and exercises scrutiny over the implementation of the budget.

Its discharge powers are particularly important. Parliament decides whether to grant the Commission discharge in respect of the implementation of the budget, taking into account the relevant financial and audit information.

This creates a connection between financial accountability and democratic oversight.

2.3. Political Supervision and Accountability

Parliament exercises political supervision over other institutions, particularly the Commission.

Its powers include:

• Electing the President of the European Commission following the nomination process established by the Treaties.
• Approving the College of Commissioners as a body.
• Questioning the Commission and conducting parliamentary debates.
• Establishing committees of inquiry under the conditions laid down in Article 226 TFEU.
• Considering motions of censure against the Commission under Article 234 TFEU.

A successful motion of censure requires a particularly demanding majority and results in the members of the Commission resigning collectively.

Parliament therefore performs functions that go beyond conventional legislative activity. It contributes to the democratic legitimacy of the Union, supervises executive authority and provides a forum for political accountability.

Its role is especially important because the EU executive structure does not reproduce the relationship between a national government and parliament in a straightforward manner.

The Commission is not simply a government appointed and dismissed through an ordinary parliamentary majority. Its appointment and accountability are governed by specific Treaty provisions.

3. The European Council: Strategic Direction and Political Leadership

The European Council occupies a distinctive position within the institutional framework.

It brings together the Heads of State or Government of the Member States, its President and the President of the European Commission. The High Representative of the Union for Foreign Affairs and Security Policy also participates in its work.

Its principal function is to provide the Union with the political direction and priorities necessary for the development of European integration.

Article 15(1) TEU expressly states that the European Council shall provide the Union with the necessary impetus for its development and define its general political directions and priorities. It shall not exercise legislative functions.

This distinction is fundamental.

3.1. Political Direction Rather Than Ordinary Legislation

The European Council addresses major political questions affecting the Union as a whole.

These may include:

• The strategic priorities of European integration.
• Institutional reforms and Treaty developments.
• Major economic and financial challenges.
• Enlargement and relations with candidate countries.
• Foreign and security policy.
• Migration and border management.
• Responses to international crises.
• Long-term political and economic objectives.

Its conclusions frequently establish the political framework within which the Commission, Parliament and Council subsequently operate.

Nevertheless, political direction must not be confused with legislative authority.

The European Council cannot ordinarily adopt regulations, directives or decisions through the ordinary legislative procedure. Its conclusions may have substantial political influence, but they do not automatically constitute legally binding legislative acts.

3.2. Composition and Presidency

The European Council is governed by Article 15 TEU and the relevant provisions of the TFEU.

Its President is elected by the European Council itself for a term of two and a half years, renewable once.

The President’s responsibilities include chairing meetings, preparing and ensuring continuity in the work of the European Council, facilitating cohesion and consensus, and representing the Union externally at the level of the common foreign and security policy, without prejudice to the powers of the High Representative.

The creation of a permanent President under the Lisbon Treaty strengthened institutional continuity.

Previously, the presidency of the European Council was closely connected to the rotating presidency of the Council of the European Union. The permanent arrangement allows the European Council to maintain a more consistent political leadership structure.

3.3. Decision-Making

The European Council generally seeks to reach decisions by consensus.

However, the Treaties prescribe qualified majority voting or unanimity for particular matters.

Its decision-making rules are therefore not uniform. The applicable voting requirement depends on the legal provision governing the issue.

This reflects the sensitivity of the matters entrusted to the European Council, particularly where decisions concern constitutional development, institutional appointments or foreign policy.

3.4. The European Council and the Council of the European Union

The distinction between these two bodies is one of the most important elements of EU institutional literacy.

Although their names are similar, they are constitutionally different.

The European Council consists principally of national political leaders and determines general political direction.

The Council of the European Union consists of representatives of Member State governments at ministerial level and participates directly in the adoption of EU legislation and policy decisions.

The European Council establishes the broad political priorities; the Council of the European Union performs legislative, coordinating and decision-making functions within the powers assigned to it.

Confusing the two institutions leads to a misunderstanding of how political authority and legislative authority are distributed within the Union.

4. The Council of the European Union: Representation of Member State Governments

The Council of the European Union is one of the two principal legislative authorities of the European Union.

Established under Article 16 TEU, it represents the governments of the Member States.

Unlike Parliament, which represents EU citizens, the Council incorporates the interests and political positions of national governments into European decision-making.

4.1. Composition and Configurations

The Council does not have a fixed membership consisting of the same ministers at every meeting.

Instead, it meets in different configurations depending on the policy area under consideration.

For example, meetings may involve ministers responsible for:

• Economic and financial affairs.
• Justice and home affairs.
• Environment.
• Agriculture and fisheries.
• Employment and social policy.
• Transport and energy.
• Foreign affairs.

Each Member State sends a representative at ministerial level who is authorised to commit the government of that state and cast its vote.

This flexible composition allows national governments to participate directly in decisions affecting their respective administrative and political responsibilities.

4.2. Legislative and Budgetary Functions

Under Article 16(1) TEU, the Council exercises legislative and budgetary functions jointly with Parliament.

Its most important legislative responsibility is participation in the ordinary legislative procedure.

The Council examines Commission proposals, develops national positions, negotiates amendments and seeks agreement with Parliament.

In practice, much of the Council’s preparatory work takes place through specialised working parties and the Committee of Permanent Representatives (COREPER).

COREPER consists of representatives of the Member States and prepares the work of the Council. It plays a central role in negotiating and resolving issues before they reach ministerial level.

The Council also participates in adopting the annual budget under Article 314 TFEU.

4.3. Policy Coordination

The Council has responsibilities extending beyond legislation.

It coordinates the policies of Member States in areas specified by the Treaties, including certain aspects of economic policy and employment policy.

It also performs functions relating to the Union’s external relations, including the conclusion of international agreements in accordance with the relevant Treaty procedures.

In the field of the Common Foreign and Security Policy, the Council plays a particularly important role.

4.4. Voting Procedures

The Council generally acts by qualified majority unless the Treaties provide otherwise.

Qualified majority voting is based on a dual requirement: a majority of Member States and a sufficient proportion of the Union’s population must support the proposal.

Under the standard rule, a qualified majority requires at least 55% of the Member States, representing at least 65% of the EU population, subject to the applicable Treaty rules.

For certain particularly sensitive areas, unanimity remains necessary.

These may include specific decisions concerning taxation, certain aspects of social policy, accession and particular foreign policy matters.

The distinction between qualified majority voting and unanimity is constitutionally important because it determines the extent to which an individual Member State can prevent the adoption of a measure.

4.5. Rotating Presidency

With the exception of the Foreign Affairs Council, which is chaired by the High Representative, the Council configurations are chaired by representatives of the Member States under a system of rotating presidencies.

Each Member State normally holds the presidency for six months.

The rotating presidency contributes to the participation of all Member States in the organisation of the Council’s work, while the system of trio presidencies provides continuity across successive six-month periods.

The Council’s institutional structure therefore combines national representation, intergovernmental negotiation and supranational legislative cooperation.

5. The European Commission: Executive Authority and Guardian of the Treaties

The European Commission is the institution primarily responsible for promoting the general interests of the Union.

Its constitutional position is established by Article 17 TEU.

Unlike the European Council and the Council, the Commission is not composed of representatives acting on behalf of national governments. Its members are required to act independently in the general interest of the Union.

The Commission performs several interconnected functions: legislative initiative, executive administration, supervision of EU law, budget management and external representation in areas assigned to it by the Treaties.

5.1. The Right of Legislative Initiative

One of the Commission’s most significant powers is its general right of legislative initiative.

Article 17(2) TEU provides that Union legislative acts shall be adopted on the basis of a Commission proposal, except where the Treaties provide otherwise.

This gives the Commission a central role in determining which legislative proposals enter the EU decision-making process.

The Commission prepares proposals after considering political priorities, legal requirements, economic and social implications, scientific evidence and stakeholder consultations.

It may also conduct impact assessments to evaluate the likely consequences of proposed legislation.

However, the Commission does not ordinarily determine the final content of legislation unilaterally.

Once a proposal has been submitted, Parliament and the Council participate in its examination and adoption.

The Commission’s right of initiative is therefore an important institutional power, but it operates within a legislative system based on cooperation between institutions.

5.2. The Commission as Guardian of the Treaties

The Commission is responsible for monitoring the application of EU law.

This role is commonly described as that of the guardian of the Treaties.

Under Article 17(1) TEU, the Commission oversees the application of the Treaties and of measures adopted by the institutions pursuant to them.

Its supervisory responsibilities are particularly significant in relation to Member State compliance.

Where a Member State fails to fulfil an obligation under EU law, the Commission may initiate infringement proceedings under Article 258 TFEU.

The procedure normally begins with a formal notice requesting the Member State to submit observations. If the Commission considers that the breach persists, it may issue a reasoned opinion.

Where the Member State does not comply, the Commission may bring the matter before the Court of Justice of the European Union.

If the Court finds an infringement, the Member State is required to take the necessary measures to comply with the judgment.

Further financial consequences may arise under Article 260 TFEU where the Member State fails to comply with the Court’s judgment.

This mechanism is fundamental to maintaining the uniform application and effectiveness of EU law.

5.3. Executive and Administrative Responsibilities

The Commission also exercises executive functions.

It manages EU programmes, administers funding mechanisms, implements the budget within the framework established by the Treaties and applicable legislation, and supervises the implementation of certain Union policies.

The Commission may adopt delegated and implementing acts where authorised by the relevant legislative framework.

Delegated acts under Article 290 TFEU allow the Commission to supplement or amend certain non-essential elements of a legislative act.

Implementing acts under Article 291 TFEU are used where uniform conditions for implementing legally binding Union acts are required.

These powers are subject to legal limitations and institutional supervision.

They do not create a general legislative authority independent of Parliament and the Council.

5.4. Composition and Independence

The Commission consists of a College of Commissioners, including its President and the High Representative in the capacity specified by the Treaties.

The Commissioners are appointed through a process involving the European Council and Parliament.

The Commission President is proposed by the European Council, taking into account the European Parliament elections, and elected by Parliament.

The other Commissioners are appointed through the Treaty procedure following consultation and parliamentary approval of the College.

Under Article 17(3) TEU, Commissioners must be independent and must neither seek nor take instructions from national governments or other institutions.

This requirement protects the Commission’s supranational character.

It also reinforces the principle that the Commission is expected to serve the general interest of the Union rather than act as a diplomatic conference of national representatives.

6. The Court of Justice of the European Union: Judicial Authority and Legal Uniformity

The Court of Justice of the European Union (CJEU) is responsible for ensuring that the law is observed in the interpretation and application of the Treaties.

Its constitutional foundation is Article 19 TEU, supplemented by Articles 251–281 TFEU and the Statute of the Court.

The judicial system consists principally of two courts:

• The Court of Justice.
• The General Court.

The Court of Justice has a central role in ensuring the uniform interpretation of EU law throughout the Member States.

The General Court primarily deals with direct actions brought by individuals, companies and Member States, subject to the jurisdictional allocation established by the Treaties and applicable legislation.

6.1. Preliminary Rulings

One of the most important mechanisms within the EU judicial system is the preliminary ruling procedure under Article 267 TFEU.

National courts may refer questions concerning the interpretation of EU law or the validity of acts adopted by EU institutions, bodies, offices or agencies to the Court of Justice.

Courts against whose decisions there is no judicial remedy under national law are generally required to make a reference where a relevant question arises, subject to the principles developed in the Court’s case law.

The preliminary ruling procedure creates a system of judicial cooperation between national courts and the CJEU.

National courts remain responsible for resolving the disputes before them, but the Court of Justice provides authoritative interpretations of EU law.

This mechanism is essential to ensuring that EU law does not acquire substantially different meanings in different Member States.

It also contributes to the development of the constitutional principles governing the Union, including direct effect, primacy and effective judicial protection.

6.2. Actions for Annulment

Under Article 263 TFEU, the Court reviews the legality of acts adopted by EU institutions, bodies, offices and agencies intended to produce legal effects vis-à-vis third parties, subject to the conditions laid down in that provision.

The grounds of review include:

• Lack of competence.
• Infringement of an essential procedural requirement.
• Infringement of the Treaties or any rule of law relating to their application.
• Misuse of powers.

The action for annulment is a central mechanism for enforcing institutional legality.

It allows the Court to examine whether an institution has acted within the boundaries of its Treaty-based authority.

The European Parliament, the Council, the Commission and the Member States have privileged standing under Article 263 TFEU. Other applicants, including natural and legal persons, must satisfy the specific admissibility requirements applicable to them.

6.3. Actions for Failure to Act

Article 265 TFEU provides a mechanism for challenging an institution’s failure to act where it was under an obligation to take a position.

This is important because institutional legality concerns not only unlawful action but also unlawful inaction.

For example, an institution may breach its legal obligations where it refuses or fails to adopt a measure that the Treaties require it to adopt.

The procedure therefore contributes to the enforcement of institutional accountability.

6.4. Judicial Protection and Institutional Balance

The CJEU has a broader constitutional responsibility than simply resolving disputes between private parties.

It ensures that EU institutions respect the limits of their authority and that the legal system operates consistently with the Treaties.

Its role is particularly important in institutional disputes, where the question may concern which institution possesses the legal authority to adopt a particular measure or participate in a particular procedure.

The Court therefore acts as an essential guarantor of institutional balance.

7. The European Central Bank: Monetary Authority and Institutional Independence

The European Central Bank (ECB) occupies a special position within the institutional framework.

Its constitutional foundations are found in Articles 127–133 TFEU and the relevant provisions of the Statute of the European System of Central Banks and the European Central Bank.

The ECB is responsible for monetary policy in the euro area, with price stability as its primary objective.

The broader European System of Central Banks (ESCB) comprises the ECB and the national central banks of all EU Member States.

The Eurosystem, by contrast, consists of the ECB and the national central banks of Member States whose currency is the euro.

This distinction is important because not every EU Member State participates in the euro area.

7.1. Monetary Policy Responsibilities

Under Article 127 TFEU, the primary objective of the ESCB is to maintain price stability.

Without prejudice to that objective, the ESCB supports the general economic policies in the Union with a view to contributing to the achievement of the Union’s objectives.

The ECB therefore exercises monetary authority within a clearly defined Treaty framework.

Its responsibilities include:

• Defining and implementing monetary policy for the euro area.
• Conducting foreign exchange operations in accordance with the Treaties.
• Holding and managing official foreign reserves of participating Member States.
• Promoting the smooth operation of payment systems.
• Contributing to financial stability within the limits of its responsibilities.

The ECB also performs specific supervisory functions in the context of the Single Supervisory Mechanism, established as part of the European Banking Union.

7.2. Institutional Independence

The ECB’s independence is a fundamental feature of the EU monetary framework.

Article 130 TFEU provides that neither the ECB nor national central banks, nor members of their decision-making bodies, may seek or take instructions from EU institutions, bodies, offices or agencies, or from Member State governments or other bodies.

The independence requirement is intended to protect monetary policy decisions from short-term political pressures.

However, independence does not mean freedom from legal constraints or accountability.

The ECB remains bound by the Treaties and may be subject to judicial review. It also has reporting and accountability obligations, particularly in relation to the European Parliament.

Its institutional position therefore illustrates how the EU framework accommodates specialised authority and operational independence while retaining constitutional and legal supervision.

8. The European Court of Auditors: Financial Accountability and Budgetary Supervision

The European Court of Auditors is the institution responsible for examining the Union’s finances.

Its constitutional foundation is Article 285 TFEU.

Its principal task is to audit EU revenue and expenditure and examine whether financial operations have been carried out lawfully and properly.

The Court of Auditors contributes to the accountability of the EU budgetary system by providing independent assessments of financial management.

8.1. Audit Functions

Under Article 287 TFEU, the Court examines the accounts of all revenue and expenditure of the Union.

Its audit responsibilities extend to the institutions, bodies, offices and agencies established by the Union, subject to the applicable legal framework.

The Court examines:

• The legality and regularity of financial transactions.
• The reliability of financial accounts.
• The soundness of financial management.
• The effectiveness and efficiency of the use of EU resources.

It may also conduct performance audits to assess whether public funds have been used economically, efficiently and effectively.

8.2. Annual and Special Reports

The Court of Auditors produces an annual report concerning the implementation of the EU budget.

It may also prepare special reports addressing particular policy areas, spending programmes or financial management issues.

Its findings are important for the European Parliament and the Council when they examine the implementation of the budget and consider whether to grant discharge to the Commission.

The Court does not itself exercise the political function of approving the budget or granting discharge.

Its responsibility is to provide independent audit findings upon which the relevant political institutions can act.

This distinction illustrates the separation between financial supervision and political accountability.

9. Advisory Bodies and the Wider Institutional Structure

Although Article 13 TEU identifies seven institutions, the institutional system also includes advisory bodies and a wider network of specialised organisations.

These bodies contribute to policy development, consultation, administrative coordination and the implementation of EU objectives.

Two advisory bodies have particular constitutional significance.

9.1. The European Economic and Social Committee

The European Economic and Social Committee (EESC) represents organised civil society.

Its membership includes representatives of employers, workers and other groups representing economic and social interests.

Its principal function is to provide opinions on legislative proposals and other matters where consultation is required or requested.

The Committee contributes expertise and perspectives that may not be directly represented through the political institutions.

Its opinions are generally advisory rather than binding.

Nevertheless, consultation with the EESC can be an important element of the legislative process, particularly in areas involving employment, economic development, social protection and the interests of civil society.

9.2. The European Committee of the Regions

The European Committee of the Regions (CoR) represents regional and local authorities.

Its existence reflects the importance of decentralised government within the Member States and the fact that many EU policies are implemented at regional and local levels.

The Committee is consulted on matters affecting regional and local interests, including areas such as:

• Regional development.
• Economic and social cohesion.
• Education and culture.
• Public health.
• Transport.
• Environmental protection.
• Employment and territorial development.

Its participation provides a channel through which local and regional perspectives can influence European policymaking.

9.3. EU Agencies and Decentralised Bodies

The Union also operates through specialised agencies and other bodies established to perform specific administrative, technical, scientific or regulatory functions.

Examples include:

• The European Environment Agency.
• The European Medicines Agency.
• The European Union Agency for Fundamental Rights.
• The European Union Agency for Law Enforcement Cooperation (Europol).
• The European Union Agency for Cybersecurity (ENISA).

These organisations contribute specialised expertise and operational capacity.

However, they do not become Treaty institutions simply because they perform important public functions.

Their authority derives from their founding legal instruments and must remain within the powers assigned to them.

The creation of agencies raises important questions concerning delegation, accountability and judicial control. Their decisions must remain consistent with EU law, and the legal framework must provide appropriate mechanisms for reviewing the exercise of their powers.

10. The Principle of Institutional Balance

Institutional balance is one of the most important constitutional principles governing the relationship between EU institutions.

It requires every institution to exercise its powers in accordance with the division of responsibilities established by the Treaties.

The principle prevents one institution from unlawfully appropriating the functions or powers assigned to another.

It is not identical to the classical doctrine of separation of powers found in national constitutional systems.

Rather, it reflects a system in which institutions have distinct functions but are expected to cooperate closely in achieving common objectives.

10.1. The Constitutional Purpose of Institutional Balance

Institutional balance serves several purposes.

First, it protects the distribution of institutional authority established by the Member States through the Treaties.

Second, it prevents excessive concentration of power.

Third, it preserves the constitutional legitimacy of EU decision-making by ensuring that each institution participates in accordance with its assigned responsibilities.

Fourth, it allows institutional cooperation without permitting one institution to eliminate the role of another.

For example, the Commission’s right of legislative initiative must be respected, but this does not allow the Commission to replace Parliament and the Council as co-legislators under the ordinary legislative procedure.

Similarly, Parliament and the Council cannot simply assume the Commission’s executive responsibilities where the Treaties or applicable legislation assign those functions to the Commission.

Institutional balance therefore operates as a legal boundary between cooperation and institutional interference.

10.2. The Historical Development of the Principle

The principle developed through the case law of the Court of Justice.

An important early foundation was established in the Meroni cases, Case 9/56 and Case 10/56.

These cases concerned the delegation of powers by the High Authority of the European Coal and Steel Community to external bodies.

The Court examined the legal limits of delegation and distinguished between clearly defined executive powers, which could be delegated under appropriate conditions, and discretionary powers involving a substantial degree of political judgment.

The underlying concern was that delegation must not alter the institutional structure established by the Treaties or transfer responsibilities in a manner that undermines the prescribed distribution of authority.

The principle subsequently developed into a broader constitutional requirement that institutions must respect the powers assigned to one another.

The Court’s interpretation is reflected in the official EUR-Lex explanation of the principle of institutional balance.

10.3. The Expansion of Parliament’s Powers

The development of institutional balance is closely connected with the gradual strengthening of the European Parliament.

In the early stages of European integration, the Parliament possessed considerably more limited legislative authority than it does today.

Successive Treaty reforms expanded its role, particularly through the introduction and development of the co-decision procedure, now known as the ordinary legislative procedure.

The Maastricht, Amsterdam and Lisbon Treaties progressively strengthened Parliament’s position.

As a result, the legislative relationship between Parliament and the Council became more balanced in a large number of policy areas.

This development demonstrates that institutional balance is not a static arrangement. Its practical content changes as the Treaties are amended and as the Court interprets institutional powers.

Nevertheless, institutional change must occur through legally recognised procedures rather than through unilateral institutional action.

10.4. Institutional Balance and Judicial Protection

The CJEU plays an essential role in protecting institutional balance.

Under Article 263 TFEU, institutions may challenge acts adopted by other institutions where the legal conditions for an action are satisfied.

Article 265 TFEU provides a corresponding mechanism in cases of failure to act.

Institutional disputes may therefore concern:

• Whether an institution possessed the necessary legal competence.
• Whether the correct legislative procedure was followed.
• Whether an institution improperly interfered with another institution’s responsibilities.
• Whether delegated powers were exercised within their legal limits.
• Whether the institutional rights guaranteed by the Treaties were respected.

Judicial review ensures that institutional disagreements are ultimately governed by law rather than merely by political bargaining.

11. The Principle of Sincere Cooperation Between Institutions

Institutional balance establishes the boundaries of institutional authority. The principle of sincere cooperation establishes the obligations governing relationships between institutions operating within those boundaries.

Article 13(2) TEU expressly requires EU institutions to practise mutual sincere cooperation.

This obligation is connected to the broader principle of sincere cooperation under Article 4(3) TEU, which primarily governs relations between the Union and its Member States.

The two provisions should not be confused.

Article 4(3) TEU requires the Union and Member States to assist one another in carrying out obligations arising from the Treaties. Article 13(2) TEU specifically addresses cooperation between the Union’s institutions.

11.1. Cooperation as a Constitutional Obligation

Sincere cooperation is more than a political expectation that institutions should maintain good working relationships.

It is a legal principle governing institutional conduct.

Institutions must exercise their respective powers in a manner that allows the Union’s constitutional system to function effectively.

This may require them to:

• Exchange information necessary for the exercise of their responsibilities.
• Respect the procedural rights of other institutions.
• Avoid obstructing the legitimate exercise of institutional powers.
• Cooperate during legislative and budgetary procedures.
• Respect agreements governing interinstitutional relations.
• Provide the assistance necessary for the implementation of Treaty obligations.

The principle becomes particularly important where institutional responsibilities overlap.

For example, during the ordinary legislative procedure, the Commission, Parliament and Council must cooperate to facilitate the adoption of legislation while preserving their respective Treaty-based powers.

The Commission may participate in negotiations and explain its proposals, but it cannot assume the legislative authority of Parliament and the Council.

Likewise, Parliament and the Council must respect the Commission’s position and procedural rights within the legislative process.

11.2. Institutional Agreements

The Treaties allow institutions to establish arrangements governing their cooperation.

Article 295 TFEU expressly provides that Parliament, the Council and the Commission may conclude interinstitutional agreements, which may be binding.

Such agreements can regulate practical aspects of institutional cooperation, including legislative programming, transparency, information exchange and working arrangements.

They help transform general constitutional obligations into more specific procedural commitments.

Nevertheless, interinstitutional agreements cannot amend the Treaties or transfer powers in a manner inconsistent with the constitutional distribution of authority.

Their validity remains dependent upon compliance with primary EU law.

11.3. Cooperation and the Effectiveness of EU Governance

The principle of sincere cooperation is particularly important because the Union’s institutional structure is deliberately fragmented.

No single institution possesses all the powers necessary to formulate, adopt, implement and supervise Union policies.

The Commission may initiate legislation, Parliament and the Council may adopt it, national administrations may implement it, and the Commission may supervise compliance.

The effectiveness of the system depends upon the proper functioning of each stage.

Institutional cooperation therefore serves a constitutional purpose: it allows different institutions to perform specialised functions while maintaining the coherence of the Union’s legal order.

12. Institutional Relations in the Legislative Process

The legislative process provides the clearest practical illustration of the institutional framework.

It demonstrates how the distribution of powers operates in practice and how institutional balance is maintained through procedural cooperation.

12.1. Legislative Initiative

The process generally begins with the European Commission.

The Commission identifies a policy problem, examines possible regulatory solutions, consults relevant stakeholders and prepares a legislative proposal.

The legal basis for its general right of initiative is Article 17(2) TEU.

However, the Commission’s initiative is not unlimited. The proposal must fall within the Union’s competences and must be supported by an appropriate legal basis in the Treaties.

Furthermore, the Commission must respect the applicable procedural requirements, including those relating to consultation, impact assessment and the principles of subsidiarity and proportionality where relevant.

12.2. Legislative Examination

Once the Commission submits its proposal, the European Parliament and the Council examine it.

Parliament considers the proposal through its committees, political groups and plenary sessions.

The Council examines it through its working parties, COREPER and relevant ministerial configurations.

Both institutions may propose amendments.

The Commission participates in the process and may modify its proposal within the conditions established by the Treaties.

12.3. Adoption Under the Ordinary Legislative Procedure

Article 294 TFEU governs the ordinary legislative procedure.

The procedure generally involves several stages.

First, the Commission submits its proposal to Parliament and the Council.

Second, Parliament adopts its position at first reading.

Third, the Council may approve Parliament’s position, in which case the act is adopted, or adopt its own position and communicate it to Parliament.

If the institutions do not agree at first reading, a second reading follows.

If disagreement persists, a conciliation committee composed of representatives of Parliament and the Council attempts to agree on a joint text.

The Commission participates in the conciliation process and supports the efforts to achieve agreement.

If a joint text is approved, it must subsequently be adopted by both Parliament and the Council.

If the institutions cannot reach agreement within the prescribed procedural framework, the proposal fails.

The ordinary legislative procedure therefore reflects a system of shared legislative authority.

Neither Parliament nor the Council can ordinarily impose legislation on the other.

12.4. Special Legislative Procedures

Not all EU legislation is adopted through the ordinary legislative procedure.

The Treaties also establish special legislative procedures.

Depending on the relevant legal basis, these may involve the Council acting as the principal legislator with the participation of Parliament through consultation or consent.

In certain limited circumstances, Parliament may also adopt legislation with the participation of the Council.

The applicable procedure must always be determined by reference to the relevant Treaty provision.

This is constitutionally important because the choice of legal basis determines not only the Union’s competence but also the institutional arrangements governing the adoption of the measure.

12.5. The Importance of Procedural Legality

The legislative process is subject to legal requirements that cannot be disregarded merely because the institutions have reached a political agreement.

Failure to consult an institution where consultation is mandatory, use of an incorrect legal basis, or infringement of essential procedural requirements may render a legislative act unlawful.

The CJEU can examine these questions through actions for annulment.

The legislative process is therefore both political and legal.

Political negotiation determines the substance of many legislative compromises, but the validity of the resulting act depends upon compliance with the Treaties.

The European Commission provides an accessible explanation of the EU law-making process.

13. Institutional Accountability, Transparency and Democratic Legitimacy

The distribution of institutional powers would be incomplete without mechanisms ensuring that those powers are exercised responsibly.

The EU institutional framework incorporates several forms of accountability.

These include political accountability, judicial accountability, financial supervision and public transparency.

13.1. Political Accountability

Political accountability operates principally through Parliament, but it is not confined to parliamentary supervision.

Parliament examines the Commission’s work, approves its appointment as a College, questions Commissioners and may adopt a motion of censure.

The Council is politically accountable through the national constitutional systems of the governments represented within it.

The European Council is composed of national political leaders who remain accountable under their respective constitutional arrangements.

These different forms of accountability reflect the Union’s dual representative structure: European citizens are represented directly through Parliament, while Member States participate through their governments.

13.2. Judicial Accountability

All EU institutions are bound by the Treaties and by the applicable principles of EU law.

Their decisions may be subject to judicial review where the relevant procedural and jurisdictional requirements are satisfied.

The CJEU ensures that institutional action complies with the constitutional framework.

This includes reviewing competence, procedural legality, respect for fundamental rights, proportionality and other applicable legal principles.

Judicial accountability is particularly important because political agreement between institutions cannot make an otherwise unlawful act valid.

13.3. Financial Accountability

Financial accountability is ensured through the combined work of the European Court of Auditors, the Commission, Parliament and the Council.

The Court of Auditors examines the legality and regularity of financial transactions and evaluates financial management.

Parliament exercises budgetary supervision and decides whether to grant discharge to the Commission.

The Council also participates in the budgetary process and contributes to the institutional assessment of financial implementation.

This structure ensures that the management of public funds is subject to both independent auditing and political scrutiny.

13.4. Transparency and Public Access

Transparency is another important element of institutional legitimacy.

Article 15 TFEU establishes a general principle of openness in the Union’s activities, subject to the applicable Treaty provisions and exceptions.

Article 15(3) TFEU provides for a right of access to documents of EU institutions, bodies, offices and agencies, subject to the conditions established by EU law.

Regulation (EC) No 1049/2001 establishes the general framework governing public access to European Parliament, Council and Commission documents.

Transparency is particularly relevant to legislative decision-making.

Citizens should be able to understand how legislative proposals are developed, which institutions participate in negotiations and how public authorities justify their decisions.

Nevertheless, transparency is not absolute. Exceptions may apply to protect public security, international relations, commercial interests, privacy and other legally recognised interests.

The challenge is to reconcile openness with the legitimate need for confidentiality in certain institutional activities.

13.5. Democratic Legitimacy in a Multilevel System

The EU’s democratic legitimacy is derived from several interconnected sources.

The European Parliament provides direct democratic representation at Union level.

The Council and European Council incorporate national democratic legitimacy through governments accountable within their respective Member States.

The Commission contributes to the general interests of the Union through an independent institutional structure established by the Treaties.

The CJEU safeguards the rule of law, while the Court of Auditors supports financial accountability.

No single institution embodies the entire democratic authority of the Union.

Instead, legitimacy emerges from the interaction of representative, intergovernmental, supranational and legal mechanisms.

This is one of the defining characteristics of the European constitutional system.

14. The Institutional Framework and the Constitutional Limits of EU Authority

The institutional framework does not operate independently of the broader constitutional principles governing European integration.

Its legitimacy depends upon compliance with the principles of conferral, subsidiarity, proportionality, the rule of law and fundamental rights.

These principles impose substantive and procedural limits on institutional action.

14.1. Conferral and the Limits of Institutional Authority

As discussed earlier, Article 5 TEU establishes that the Union may act only within the competences conferred upon it by the Member States.

This means that an institution cannot justify an action merely by invoking the general objectives of European integration.

There must be a valid legal basis.

Institutional competence must therefore be assessed together with the substantive competence of the Union.

14.2. Subsidiarity

The principle of subsidiarity, established in Article 5(3) TEU, applies in areas that do not fall within the Union’s exclusive competence.

It requires the Union to act only where the objectives of the proposed action cannot be sufficiently achieved by the Member States at central, regional or local level and can, by reason of the scale or effects of the proposed action, be better achieved at Union level.

The principle influences how institutions exercise legislative authority.

The Commission must consider subsidiarity when preparing proposals, while national parliaments participate in monitoring compliance through the procedures established by Protocol No 2.

The principle therefore connects institutional decision-making with the constitutional autonomy of Member States.

14.3. Proportionality

Article 5(4) TEU provides that the content and form of Union action must not exceed what is necessary to achieve the objectives of the Treaties.

Proportionality applies to the exercise of institutional powers across different policy areas.

An institution must select measures that are suitable for achieving the legitimate objective pursued and must not impose restrictions or burdens that go beyond what is necessary.

The CJEU may examine compliance with proportionality through judicial review.

The principle is particularly important where institutional action affects economic freedoms, fundamental rights, national regulatory autonomy or private interests.

14.4. The Rule of Law and Fundamental Rights

The institutional framework is also subject to the rule of law.

Article 2 TEU identifies the rule of law as one of the foundational values of the Union.

Article 6 TEU recognises the legal status of the Charter of Fundamental Rights of the European Union, which has the same legal value as the Treaties.

EU institutions must therefore respect fundamental rights when exercising their powers within the scope of EU law.

The Charter binds EU institutions in all their activities, while Member States are bound by it when implementing Union law, in accordance with Article 51 of the Charter.

This requirement prevents institutional authority from becoming an unrestricted exercise of public power.

It also reinforces the constitutional principle that the legality of EU action depends upon compliance with substantive rights as well as formal institutional procedures.

15. The Evolving Nature of the EU Institutional Framework

The institutional structure of the European Union has developed considerably since the establishment of the European Communities.

The original institutional arrangements were designed for a smaller and more limited system of European cooperation.

As integration expanded into economic, social, monetary, environmental, judicial and external policy fields, the institutional framework evolved accordingly.

Successive Treaty reforms strengthened Parliament’s legislative role, expanded the use of qualified majority voting, clarified the relationship between the European Council and the Council, and reinforced the constitutional position of the Commission and the CJEU.

The Lisbon Treaty, which entered into force in 2009, was particularly important.

It formally recognised the European Council as an EU institution, strengthened the ordinary legislative procedure, extended the scope of qualified majority voting and introduced further changes to the Union’s external representation and institutional arrangements.

Nevertheless, the institutional framework continues to face structural challenges.

15.1. The Balance Between Supranationalism and Intergovernmentalism

One continuing challenge concerns the relationship between supranational and intergovernmental decision-making.

The Commission, Parliament and CJEU embody important elements of supranational governance.

The European Council and the Council preserve the central role of national governments in determining common policies.

The balance between these approaches varies according to the policy area.

For example, the ordinary legislative procedure gives Parliament and the Council substantial shared legislative authority, whereas the Common Foreign and Security Policy retains important intergovernmental characteristics.

This flexibility allows the Union to accommodate different levels of integration while preserving a common institutional framework.

However, it may also create complexity and make the institutional system difficult for citizens to understand.

15.2. Institutional Efficiency and Democratic Participation

Another challenge concerns the relationship between efficient decision-making and democratic legitimacy.

The Union must be capable of responding to economic, environmental, technological and geopolitical developments.

At the same time, rapid decision-making must not undermine the institutional safeguards established by the Treaties.

The expansion of executive and administrative responsibilities also raises questions about the accountability of agencies, expert bodies and delegated decision-makers.

The more complex the institutional system becomes, the more important transparency, parliamentary scrutiny and judicial protection become.

15.3. Institutional Balance as a Dynamic Constitutional Principle

Institutional balance must adapt to the development of European integration without losing its fundamental purpose.

It does not require that every institution possess equal powers or that the distribution of authority remain permanently unchanged.

Rather, it requires that institutional change occur through the constitutional mechanisms established by the Treaties.

The principle therefore allows the Union to develop while preserving legal continuity and the distribution of responsibilities.

It is this combination of flexibility and constitutional limitation that makes institutional balance one of the defining principles of EU governance.

16. Key Takeaways

The institutional framework of the European Union is based on a distribution of powers among seven institutions, each possessing distinct responsibilities established by the Treaties.

The most important principles and institutional functions can be summarised as follows:

1. Article 13 TEU establishes the seven EU institutions and provides the constitutional foundation for their cooperation.

2. The principle of conferral limits institutional authority to the powers granted by the Treaties.

3. The European Parliament represents EU citizens and exercises legislative, budgetary and political control functions.

4. The European Council determines the general political direction and priorities of the Union but does not exercise legislative functions.

5. The Council of the European Union represents national governments and participates in legislative, budgetary and policy-coordination functions.

6. The European Commission promotes the general interests of the Union, proposes legislation, supervises the application of EU law and exercises executive responsibilities.

7. The Court of Justice of the European Union ensures the uniform interpretation and application of EU law and protects the legality of institutional action.

8. The European Central Bank exercises monetary policy responsibilities within the euro area and operates under a framework of institutional independence.

9. The European Court of Auditors examines EU revenue and expenditure and contributes to financial accountability.

10. Institutional balance requires each institution to respect the powers assigned to the others by the Treaties.

11. Sincere cooperation requires institutions to cooperate in good faith while preserving their respective constitutional responsibilities.

12. Judicial review, transparency and political accountability ensure that institutional authority remains subject to legal and democratic control.

Ultimately, the EU institutional framework represents an attempt to reconcile democratic representation, national sovereignty, supranational authority and the rule of law within a single constitutional system.

17. Frequently Asked Questions (FAQs)

1. How many institutions does the European Union have?

The European Union has seven institutions expressly identified in Article 13 TEU: the European Parliament, European Council, Council of the European Union, European Commission, Court of Justice of the European Union, European Central Bank and European Court of Auditors.

These institutions must be distinguished from EU agencies, advisory bodies and other organisations that perform specialised functions.

2. What is the difference between the European Council and the Council of the European Union?

The European Council consists principally of the Heads of State or Government of the Member States and determines the Union’s general political direction and priorities.

The Council of the European Union consists of national ministers and participates directly in adopting EU legislation and the budget, together with the European Parliament.

The European Council provides strategic political leadership, whereas the Council of the European Union exercises legislative and other Treaty-based decision-making responsibilities.

3. Which EU institution proposes legislation?

The European Commission possesses the general right of legislative initiative under Article 17(2) TEU.

It prepares and submits legislative proposals to the European Parliament and the Council, which generally act as co-legislators.

The Treaties provide certain exceptions, including specific circumstances in which other institutions may initiate legislative action.

4. Which institutions adopt EU legislation?

Most EU legislation is adopted jointly by the European Parliament and the Council of the European Union under the ordinary legislative procedure established by Article 294 TFEU.

Certain policy areas are governed by special legislative procedures, under which the Council or, in limited circumstances, Parliament has a different legislative role.

5. What is the principle of institutional balance?

Institutional balance is the constitutional principle requiring each EU institution to exercise its powers within the limits established by the Treaties and to respect the responsibilities assigned to other institutions.

It prevents one institution from unlawfully assuming the powers of another and preserves the constitutional distribution of authority within the Union.

6. What is the difference between institutional balance and separation of powers?

The separation of powers traditionally concerns the division of governmental authority into legislative, executive and judicial functions.

Institutional balance in the EU is related to this idea but is not identical to it.

The EU institutional system combines differentiated responsibilities with extensive cooperation. For example, legislative authority is shared between Parliament and the Council, while the Commission participates in the legislative process through its right of initiative and other procedural functions.

The system therefore emphasises both the preservation of institutional competences and cooperation between institutions.

7. What is the principle of sincere cooperation between EU institutions?

Article 13(2) TEU requires EU institutions to practise mutual sincere cooperation.

This means that institutions must respect one another’s responsibilities, exchange relevant information and cooperate in fulfilling the objectives established by the Treaties.

It prevents institutional conduct that would improperly obstruct the exercise of another institution’s lawful powers.

8. Who supervises the application of EU law by Member States?

The European Commission is primarily responsible for monitoring whether Member States comply with EU law.

Under Article 258 TFEU, it may initiate infringement proceedings against a Member State that fails to fulfil its obligations.

If the dispute is not resolved, the Commission may refer the matter to the Court of Justice of the European Union.

9. Can EU institutions be challenged before the Court of Justice?

Yes. Under Article 263 TFEU, the legality of certain acts adopted by EU institutions, bodies, offices and agencies may be challenged before the CJEU.

The grounds include lack of competence, infringement of essential procedural requirements, infringement of the Treaties and misuse of powers.

Article 265 TFEU also provides a procedure for challenging certain failures to act.

10. Is the European Central Bank independent of other EU institutions?

Yes. Article 130 TFEU protects the independence of the ECB and national central banks in the exercise of their Treaty-based responsibilities.

However, independence does not mean exemption from legal obligations. The ECB remains subject to the Treaties, judicial review and its applicable accountability requirements.

11. What is the role of the European Court of Auditors?

The European Court of Auditors examines the Union’s revenue and expenditure and assesses the legality, regularity and sound financial management of EU resources.

It provides independent audit findings that support the financial supervision exercised by the European Parliament and the Council.

12. Are the European Economic and Social Committee and the Committee of the Regions EU institutions?

No. They are advisory bodies assisting Parliament, the Council and the Commission.

The European Economic and Social Committee represents organised civil society, while the Committee of the Regions represents regional and local authorities.

Their opinions contribute to policymaking but do not ordinarily have binding legislative force.

13. Why is institutional balance important for the rule of law?

Institutional balance prevents the concentration and arbitrary exercise of public authority.

By requiring each institution to remain within its Treaty-based competence, it ensures that institutional decisions are legally authorised and subject to appropriate scrutiny.

It also allows the CJEU to review institutional action and protect the constitutional structure of the Union.

Conclusion

The institutional framework of the European Union is one of the most distinctive features of its constitutional order. It reflects an attempt to establish a functioning system of common governance without eliminating the political and constitutional identity of the Member States.

The seven institutions perform different but interconnected functions. Parliament represents European citizens, the European Council provides strategic political direction, the Council represents national governments, and the Commission promotes the general interests of the Union. The CJEU safeguards legal uniformity, the ECB exercises monetary responsibilities, and the Court of Auditors protects financial accountability.

Their relationship is governed by the principles of conferral, institutional balance and sincere cooperation. These principles ensure that the exercise of authority remains legally defined while allowing the institutions to cooperate in pursuing common objectives.

The institutional system is therefore neither a conventional parliamentary government nor a simple arrangement of intergovernmental diplomacy. It is a complex constitutional structure in which authority is distributed across different levels of representation, administration, supervision and judicial control.

Its effectiveness depends not on the dominance of one institution but on the capacity of all institutions to exercise their respective responsibilities within a common legal framework.

Ultimately, institutional balance is the constitutional mechanism through which the European Union reconciles the exercise of shared authority with the preservation of legality, democratic legitimacy and the autonomy of its constituent Member States.

18. Primary Legal Sources and Further Reading

The following official sources provide the principal legal foundations for understanding the EU institutional framework.

Primary legislation

1. Treaty on European Union – Article 5: Principle of Conferral, Subsidiarity and Proportionality.
2. Treaty on European Union – Article 13: The Institutional Framework.
3. Treaty on European Union – Article 14: The European Parliament.
4. Treaty on European Union – Article 15: The European Council.
5. Treaty on European Union – Article 16: The Council.
6. Treaty on European Union – Article 17: The European Commission.
7. Treaty on European Union – Article 19: The Court of Justice of the European Union.
8. Treaty on the Functioning of the European Union, particularly Articles 127–133, 251–281, 263, 265, 287, 290, 291, 294 and 314.

Institutional and judicial resources

9. EUR-Lex – European Union Institutions.
10. EUR-Lex – The Principle of Institutional Balance.
11. European Commission – Adopting EU Law.
12. European Parliament – Powers and Responsibilities.
13. Council of the European Union – Decision-Making.
14. Court of Justice of the European Union.

Important case law

15. Meroni v High Authority, Joined Cases 9/56 and 10/56, concerning the limits of delegation of powers and the preservation of the institutional structure.
16. European Parliament v Council, Case C-70/88 (Chernobyl), concerning Parliament’s institutional prerogatives and access to judicial protection.