10.1 The Four Freedoms of the Internal Market

10.1 The Four Freedoms of the Internal Market

Treaty Anchor: Articles 26, 28–37, 45–66 of the Treaty on the Functioning of the European Union (TFEU), Directive 2004/38/EC (Citizens' Rights Directive), and Directive 2006/123/EC (Services Directive).

The internal market is the central economic architecture of the European Union. Under Article 26(2) TFEU, the internal market comprises "an area without internal frontiers in which the free movement of goods, persons, services and capital is ensured in accordance with the provisions of the Treaties." First conceptualized in the 1957 Treaty of Rome as a common market, the project was decisively revitalized by the Single European Act (1986), which established the target deadline of 31 December 1992 to dismantle physical, technical, and fiscal barriers to trade.

The realization of the internal market relies on two parallel legal methodologies:

1. Negative Integration: The judicial dismantling of domestic national rules, tariffs, taxes, and quotas that obstruct cross-border trade, enforced primarily through direct treaty prohibitions and Court of Justice of the European Union (CJEU) preliminary rulings.
2. Positive Integration: The legislative approximation and harmonization of divergent national laws by the European Parliament and the Council, primarily enacted under Article 114 TFEU (the general internal market legal basis) via the Ordinary Legislative Procedure.

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Free Movement of Goods (Articles 28–37 TFEU)

The free movement of goods is the oldest and most legally developed freedom of the internal market. It operates through two complementary pillars: the Customs Union (fiscal barriers) and the prohibition of non-tariff quantitative restrictions (regulatory barriers).

1. The Customs Union (Articles 28–30 TFEU)

Under Article 28 TFEU, the Union forms a Customs Union covering all trade in goods. It has two dimensions:

• Internal Dimension: The total abolition of customs duties on imports and exports between Member States, as well as all charges having equivalent effect (CEEs) under Article 30 TFEU.
• External Dimension: The adoption of a Common Customs Tariff (CCT) under Article 31 TFEU in their relations with third countries. Under Article 29 TFEU, products originating from non-EU countries are deemed to be in "free circulation" in a Member State once all import formalities have been completed and customs duties paid, after which they enjoy identical internal market protections.

In Statistical Levy (Case 24/68) and Sociaal Fonds voor de Diamantarbeiders (Cases 2/69 and 3/69), the CJEU defined a CEE as any pecuniary charge, however small and whatever its designation and mode of application, which is imposed unilaterally on goods by reason of the fact that they cross a frontier, and which is not a customs duty in the strict sense. The prohibition under Article 30 TFEU is absolute: it admits no justifications or public interest defences.

Distinguishing CEEs from Internal Taxation (Article 110 TFEU)

A critical distinction in EU law separates Article 30 from Article 110 TFEU:

• Article 30 TFEU (CEEs): Applies to charges triggered exclusively by crossing a national border. CEEs are prohibited per se.
• Article 110 TFEU (Internal Taxation): Applies to internal taxes forming part of a general system of domestic dues applied systematically to domestic and imported goods alike.
  • Article 110(1) strictly prohibits discriminatory taxation on similar foreign products.
  • Article 110(2) prohibits internal taxation designed to afford indirect protection to other competing domestic products (Commission v United Kingdom Case 170/78, beer vs. wine).
• Articles 30 and 110 are mutually exclusive (Alfons Lütticke Case 57/65).

2. Elimination of Quantitative Restrictions & MEQRs (Articles 34–36 TFEU)

While fiscal barriers are governed by Articles 30 and 110, non-fiscal barriers are regulated by Articles 34 and 35 TFEU.

• Quantitative Restrictions (QRs): Quotas or complete bans on the import or export of goods (Geddo Case 2/73).
• Measures Having Equivalent Effect to Quantitative Restrictions (MEQRs): The legal concept governing non-tariff regulatory barriers, established across three landmark CJEU judgments:

                                  DASSONVILLE (Case 8/74)
                 "All trading rules enacted by Member States capable of hindering,
                  directly or indirectly, actually or potentially, intra-EU trade"
                                             │
                                             ▼
                               CASSIS DE DIJON (Case 120/78)
              ┌─────────────────────────────────────────────────────────────┐
              ▼                                                             ▼
   Principle of Mutual Recognition                                Mandatory Requirements
 (Goods lawfully produced in one MS must                       (Indistinctly applicable rules
  be admitted into all other MS)                                justifiable if necessary & proportionate)
                                             │
                                             ▼
                           KECK & MITHOUARD (Cases C-267 & 268/91)
              ┌─────────────────────────────────────────────────────────────┐
              ▼                                                             ▼
     Product Characteristics                                  Certain Selling Arrangements
  (Design, shape, size, packaging)                             (Rules on when, where, by whom sold)
  -> Covered by Article 34 TFEU                                -> Outside Article 34 TFEU if equal in law & fact

The Landmark Case Law Progression

1. Procureur du Roi v Benoît and Gustave Dassonville (Case 8/74): The Court formulated the foundational definition of an MEQR: "All trading rules enacted by Member States which are capable of hindering, directly or indirectly, actually or potentially, intra-Community trade are to be considered as measures having an effect equivalent to quantitative restrictions." This expansive test catches measures even where there is no discriminatory intent and no proof of an actual reduction in import volumes.

2. Rewe-Zentral AG v Bundesmonopolverwaltung für Branntwein (Cassis de Dijon, Case 120/78): Germany prohibited the marketing of fruit liqueurs with an alcohol content below 25%, blocking French Cassis de Dijon (15–20% alcohol). The CJEU established two transformative doctrines:

• Principle of Mutual Recognition: Goods lawfully produced and marketed in one Member State must, in principle, be admitted to the market of any other Member State without technical modification.
• Rule of Reason / Mandatory Requirements (exigences impératives): Indistinctly applicable national rules (rules that apply equally to domestic and imported goods) may restrict free movement only if they are necessary to satisfy mandatory requirements—such as public health, consumer protection, environmental protection, or the fairness of commercial transactions—and comply with the principle of proportionality (suitable and not going beyond what is strictly necessary).

1. Keck and Mithouard (Joined Cases C-267/91 and C-268/91): Addressing excessive litigation challenging non-discriminatory retail regulations, the CJEU introduced a critical bifurcation:

• Product Characteristics: Rules relating to shape, size, weight, composition, presentation, identification, or packaging continue to fall within Article 34 TFEU and must be justified under Cassis mandatory requirements or Article 36.
• Certain Selling Arrangements (CSAs): Rules regulating the conditions, hours, locations, or marketing methods of sales (such as bans on retail sales at a loss, Sunday shopping limits, or rules on advertising) fall outside the scope of Article 34 TFEU, provided that:
  1. They apply to all relevant traders operating within the national territory; and
  2. They affect in the same manner, in law and in fact, the marketing of domestic products and of products from other Member States.

Treaty Derogations (Article 36 TFEU)

Where a national measure constitutes an MEQR under Article 34 (or Article 35 for export restrictions under Groenveld Case 15/79), it can only be justified if it falls within the exhaustive list of grounds set out in Article 36 TFEU:

• Public morality, public policy, or public security;
• Protection of health and life of humans, animals, or plants;
• Protection of national treasures possessing artistic, historic, or archaeological value;
• Protection of industrial and commercial property (patents, trademarks, copyrights).

Under the Article 36 proviso, such prohibitions or restrictions must not constitute a means of arbitrary discrimination or a disguised restriction on trade between Member States, and must adhere strictly to the principle of proportionality (Campus Oil Case 72/83; Commission v United Kingdom (UHT Milk) Case 124/81).

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Free Movement of Workers and Persons (Article 45 TFEU & Directive 2004/38/EC)

1. Free Movement of Workers (Article 45 TFEU)

Article 45 TFEU has direct horizontal and vertical effect (Angonese Case C-281/98; Van Duyn Case 41/74). It entitles EU nationals to accept offers of employment, move freely within Member States for this purpose, stay in a Member State for employment, and remain after having been employed.

• Autonomous EU Definition of "Worker": The term "worker" cannot be defined by national law. In Levin (Case 53/81) and Lawrie-Blum (Case 66/85), the CJEU established that a worker is any person who:
  1. Performs services for and under the direction of another person;
  2. For a certain period of time;
  3. In return for which they receive remuneration. The activity must be effective and genuine, excluding activities on such a small scale as to be purely marginal and ancillary. Part-time workers and trainees qualify if the criteria are met.
• Prohibition of Discrimination: Article 45(2) prohibits any discrimination based on nationality regarding employment, remuneration, working conditions, and social and tax advantages (Even Case 207/78). It catches direct discrimination, indirect discrimination (such as residency requirements, Scholz Case C-419/92), and non-discriminatory obstacles to market access (Bosman Case C-415/93).
• The Public Sector Exception (Article 45(4) TFEU): Member States may reserve certain public sector posts for their own nationals. In Commission v Belgium (Case 149/79), the CJEU ruled that this exception must be interpreted strictly. It is limited exclusively to posts involving direct or indirect participation in the exercise of public authority and duties designed to safeguard the general interests of the State (e.g., armed forces, police, judiciary, senior diplomatic corps). It does not apply to teachers, municipal bus drivers, hospital nurses, or public research staff.
• Social Security Coordination: Under Regulation (EC) No 883/2004, workers retain acquired social security rights across borders based on four principles: equal treatment, determination of a single applicable legislation (lex loci laboris), aggregation of insurance periods, and exportability of cash benefits.

2. Union Citizenship and Directive 2004/38/EC

Introduced by the Maastricht Treaty, Article 20 TFEU establishes Union citizenship, which is additional to and does not replace national citizenship (Grzelczyk Case C-184/99: "Union citizenship is destined to be the fundamental status of nationals of the Member States").

Directive 2004/38/EC (Citizens' Rights Directive) codifies entry and residency rights for all EU citizens and their qualifying family members (regardless of nationality):

Public Order Derogations and Expulsion Protections

Under Chapter VI of Directive 2004/38/EC, Member States may restrict freedom of movement on grounds of public policy, public security, or public health:

• Restrictions must comply with proportionality and be based exclusively on the personal conduct of the individual. Previous criminal convictions do not in themselves constitute grounds (Article 27(2)).
• Expulsion protections increase with integration: ordinary citizens require genuine present threat; permanent residents (>5 years) require serious grounds of public policy or security (Article 28(2)); residents of >10 years or minors require imperative grounds of public security (Article 28(3)).

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Freedom of Establishment vs Freedom to Provide Services

The TFEU distinguishes between economic operators operating permanently within another Member State and those providing services on a temporary cross-border basis.

                             ECONOMIC ACTIVITY IN ANOTHER MEMBER STATE
                                                 │
                         Is the economic presence stable and continuous?
                                                 │
                        ┌────────────────────────┴────────────────────────┐
                        ▼                                                 ▼
                       YES                                                NO
             FREEDOM OF ESTABLISHMENT                              FREEDOM TO PROVIDE SERVICES
                (Article 49 TFEU)                                      (Article 56 TFEU)
    Permanent, stable physical presence                   Temporary, cross-border economic provision
    (e.g., subsidiaries, branches, offices)               (Provider moves, recipient moves, or service moves)

1. Freedom of Establishment (Article 49 TFEU)

Article 49 TFEU guarantees the right of natural persons and legal entities to set up and manage undertakings, companies, agencies, branches, or subsidiaries in another Member State under the conditions laid down for its own nationals.

• In Gebhard (Case C-55/94), the CJEU clarified that establishment entails the stable and continuous participation in the economic life of a host Member State on a permanent basis.
• Corporate Mobility: Under Article 54 TFEU, companies formed in accordance with the law of a Member State and having their registered office, central administration, or principal place of business within the Union are treated identically to natural persons. In landmark rulings such as Centros (Case C-212/97) and Inspire Art (Case C-167/01), the CJEU confirmed that forming a company in one Member State (such as the UK) primarily to establish a branch in another Member State (such as Denmark or the Netherlands) to take advantage of more flexible company formation rules is a legitimate exercise of Article 49 and does not in itself constitute an abuse of law.

2. Freedom to Provide Services (Article 56 TFEU)

Article 56 TFEU prohibits restrictions on the freedom to provide services within the Union for nationals of Member States established in an EU country other than that of the person for whom the services are intended. Under Article 57 TFEU, services are defined residually as activities normally provided for remuneration, insofar as they are not governed by the provisions relating to goods, capital, or persons.

Cross-border services manifest in four primary modalities:

1. Provider travels: The service provider temporarily moves to the recipient's Member State (Van Binsbergen Case 33/74).
2. Recipient travels: The client travels to the provider's Member State (Luisi and Carbone Cases 286/82 and 26/83, medical tourism).
3. Service travels: Neither moves physically; the service crosses the border electronically or by post (Alpine Investments Case C-384/93).
4. Both travel: Both provider and recipient move to a third Member State.

The Services Directive (Directive 2006/123/EC)

To dismantle widespread regulatory obstacles in the services sector (which accounts for over 70% of EU GDP), the EU adopted Directive 2006/123/EC (the "Bolkestein Directive"):

• Administrative Simplification: Member States must establish Points of Single Contact (PSCs) enabling providers to complete all procedures and formalities online, alongside the principle of tacit authorization.
• Prohibited Requirements (Article 14): Explicitly bans discriminatory requirements, including nationality requirements, restrictions on multiple establishments, and economic needs tests.
• Freedom to Provide Services (Article 16): Replaced the controversial "country of origin principle" with a robust guarantee that Member States must respect the right of providers to supply services. National restrictions are permissible only when non-discriminatory, proportionate, and justified by reasons of public policy, public security, public health, or environmental protection.

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Free Movement of Capital and Payments (Articles 63–66 TFEU)

1. The Legal Scope of Article 63 TFEU

Codified by the Maastricht Treaty, Article 63 TFEU directly prohibits:

• Article 63(1): All restrictions on the movement of capital between Member States and between Member States and third countries.
• Article 63(2): All restrictions on payments between Member States and between Member States and third countries.

Crucially, Article 63 is the only fundamental freedom with explicit erga omnes external reach: its prohibitions apply equally to capital transactions involving third-country jurisdictions. Furthermore, the CJEU confirmed in Sanz de Lera (Joined Cases C-163/94, C-165/94, and C-250/94) that Article 63 has direct effect, invalidating prior national authorization procedures without requiring implementing legislation.

Differentiating Capital and Payments

• Capital Movements: Financial transactions aimed at the investment, placement, or transfer of assets rather than remuneration for an underlying service or good. Includes direct investment (FDI), real estate purchases, portfolio investments in stocks and bonds, loans, and financial credits (Luisi and Carbone).
• Payments: Transfers of foreign exchange or funds that represent the contractual monetary consideration for an underlying transaction (e.g., settling an invoice for imported industrial machinery or paying for legal advisory services across borders).

2. Exceptions and State Control (Articles 65 and 66 TFEU)

Under Article 65 TFEU, Member States may apply national tax provisions that distinguish between taxpayers based on their residence or the place where their capital is invested, provided this does not constitute arbitrary discrimination or a disguised restriction. Member States may also enact measures for prudential supervision of financial institutions and public security.

• Golden Shares Jurisprudence: The CJEU has repeatedly struck down national "golden shares"—special veto rights retained by Member States in privatized strategic companies (such as telecom, energy, and automotive firms)—where those rights grant disproportionate state control over corporate investment decisions without objective, verifiable, and proportionate public interest criteria (Commission v Portugal Case C-367/98; Volkswagen Case C-112/05).
• FDI Screening Regulation (EU) 2019/452: Established an EU-wide framework for screening Foreign Direct Investments from third countries on grounds of security or public order, facilitating intelligence sharing between the Commission and Member States concerning acquisitions in critical infrastructure, artificial intelligence, and strategic technologies.