Cross-Border Enforcement Cooperation Frameworks

1. Introduction

Cross-border enforcement cooperation frameworks are the legal arrangements through which regulators, courts and public authorities in different countries cooperate to investigate violations, exchange information, enforce decisions and protect energy markets.

In energy law, this is important because electricity and gas markets frequently operate across national borders. An energy company may be incorporated in one country, operate infrastructure in another, trade electricity in a third market, and process customer or market data across several jurisdictions.

Therefore, national enforcement alone may not be sufficient. Effective regulation requires cooperation between energy regulators, competition authorities, courts, transmission-system operators and other public bodies.

2. Main Objectives

The main objectives are:

Information Sharing

Authorities may exchange information concerning market manipulation, licensing violations, consumer protection, network access and regulatory compliance.

Joint Investigations

Where conduct affects more than one country, regulators may coordinate investigations or conduct parallel investigations.

Enforcement of Decisions

A regulator may need assistance from another country's authority or court to obtain evidence, impose sanctions or enforce an order.

Protection of Cross-Border Markets

Cooperation helps prevent companies from avoiding enforcement simply by moving activities, assets or operations across national borders.

3. EU Energy Enforcement Framework

The European Union provides an important example of cross-border enforcement cooperation.

Under Regulation (EU) 2019/942, the Agency for the Cooperation of Energy Regulators (ACER) has responsibilities concerning cooperation between national regulatory authorities and the functioning of the internal electricity market.

The REMIT Regulation is particularly important for wholesale energy-market enforcement. It prohibits insider trading and market manipulation in wholesale energy markets and establishes cooperation mechanisms between ACER and national regulatory authorities.

This creates a multi-level structure:

ACER → National Energy Regulators → Market Participants → National Courts

Such cooperation is important because electricity trading can occur simultaneously across several national markets.

4. Information and Evidence

Cross-border investigations often depend on access to evidence located in another jurisdiction.

Evidence may include:

electricity trading records;

bidding information;

communications;

smart-meter information;

financial records;

contracts;

transmission data; and

internal company documents.

European regulatory frameworks permit authorities to cooperate and exchange relevant information while also requiring confidentiality and appropriate safeguards.

The European Competition Network (ECN) provides another example. Competition authorities cooperate in investigations involving conduct affecting more than one EU Member State.

5. Competition Enforcement

Cross-border electricity markets may create competition-law issues involving:

abuse of market power;

discriminatory network access;

cartel agreements;

market sharing;

exclusionary conduct; and

manipulation of electricity markets.

The EU's competition system allows the European Commission and national competition authorities to cooperate in enforcing Articles 101 and 102 TFEU.

T-Mobile Netherlands, Case C-8/08

The CJEU examined coordination between competitors and the concept of restriction of competition.

Relevance: Although not an energy case, the judgment illustrates how EU competition rules can address coordinated conduct affecting markets and why common enforcement standards are important across Member States.

6. Cross-Border Energy Market Manipulation

Energy markets are especially vulnerable to cross-border manipulation because electricity can be traded rapidly across interconnected markets.

REMIT therefore requires cooperation between ACER and national regulators. Where suspicious transactions occur across borders, authorities can share information and coordinate enforcement.

This is important for conduct such as:

Market participant in Country A → trades in Country B → affects prices in Countries C and D

Without cooperation, a regulator might see only part of the transaction.

7. Important Case Law: ACER and Regulatory Authority

Germany v ACER, Case T-283/19

The General Court considered the division of regulatory responsibilities concerning cross-border electricity matters and ACER's powers.

The case is important because cross-border energy regulation requires clear allocation of authority between national regulators and EU-level institutions.

It illustrates that cooperation does not mean that national regulators lose all authority. Instead, EU law establishes circumstances in which an EU-level body may intervene to ensure consistent treatment of cross-border issues.

8. Court Cooperation

Regulatory cooperation may also require cooperation between national courts.

The Brussels I Recast Regulation provides rules concerning jurisdiction and recognition and enforcement of judgments in civil and commercial matters within the EU.

For energy disputes, this can become relevant when a company obtains a judgment in one Member State and seeks enforcement against assets located in another.

Similarly, arbitration awards may require recognition and enforcement under the New York Convention 1958.

Thus:

Regulator → Investigation

Court → Judgment

Foreign Court → Recognition/Enforcement

This creates a broader cross-border enforcement structure.

9. Brexit and UK-EU Cooperation

Brexit changed the institutional framework for UK-EU regulatory cooperation.

The UK is no longer part of the EU regulatory system in the same way as an EU Member State. However, cooperation continues through agreements and regulatory arrangements.

The EU-UK Trade and Cooperation Agreement (TCA) contains provisions supporting cooperation in areas including energy and regulatory matters.

For Great Britain, regulators such as Ofgem must cooperate with European counterparts through appropriate bilateral and international arrangements rather than relying automatically on EU Member State mechanisms.

This creates an important distinction between:

EU Member State ↔ EU Member State

and

UK ↔ EU Member State

The second relationship depends more heavily on international agreements and domestic implementing law.

10. Limits on Cross-Border Enforcement

Cross-border enforcement is not unlimited. Authorities must consider:

national sovereignty;

jurisdiction;

confidentiality;

data protection;

procedural fairness;

privilege;

different legal systems; and

proportionality of enforcement measures.

A regulator cannot automatically exercise coercive powers inside another country's territory.

Usually, cooperation must operate through a legally recognised mechanism such as a treaty, EU regulation, bilateral agreement or judicial cooperation framework.

11. Case: Intel Corp v Commission, Case C-413/14 P

The CJEU examined competition enforcement and the territorial effects of EU competition law.

Relevance: The judgment demonstrates that competition enforcement can have cross-border dimensions, while the exercise of regulatory authority still requires a proper legal basis.

For energy markets, this principle is significant because electricity and gas transactions may have effects beyond the country in which the conduct physically occurs.

12. Conclusion

Cross-border enforcement cooperation frameworks create a system through which national and international authorities can work together to investigate and enforce energy laws across borders.

The main mechanisms include:

information sharing;

joint or coordinated investigations;

regulatory cooperation;

competition-law cooperation;

judicial assistance;

recognition and enforcement of decisions; and

international agreements.

For energy-law research, the central issue is how to balance effective cross-border enforcement with national jurisdiction, privacy, confidentiality and procedural fairness.

Cases involving ACER and cross-border electricity regulation, together with wider EU competition and judicial-cooperation jurisprudence, demonstrate that modern energy enforcement increasingly requires multi-level governance rather than isolated national enforcement.