Cross-Border Infrastructure Treaties

1. Introduction

Cross-border infrastructure treaties are international agreements between States that establish legal rules for infrastructure connecting or affecting two or more countries. In energy law, they are especially important for electricity interconnectors, gas and oil pipelines, LNG facilities, hydrogen networks and undersea energy cables.

Such treaties can regulate construction, ownership, operation, transit, access, investment, safety, environmental protection, emergency cooperation and dispute settlement.

The need for these treaties arises because infrastructure may physically cross one country's territory while providing services to another. A pipeline or electricity interconnector can therefore create legal interests for several States simultaneously.

2. Main Objectives

Cross-border infrastructure treaties generally seek to:

a. Facilitate Infrastructure Development

Treaties can establish procedures for constructing and operating infrastructure crossing national boundaries.

b. Guarantee Energy Transit

Energy products need predictable routes through transit countries. The Energy Charter Treaty (ECT), for example, requires contracting parties to facilitate energy transit without unreasonable delays, restrictions or charges. (Energy Charter Treaty)

c. Establish Infrastructure Rights

Treaties may address land rights, access, operation, maintenance and use of cross-border infrastructure.

d. Promote Non-Discrimination

Rules can prevent unjustified discrimination based on the origin, destination or ownership of energy products.

e. Manage Disputes

Treaties may establish negotiation, conciliation, arbitration or judicial mechanisms when States or infrastructure operators disagree.

3. Energy Charter Treaty

The Energy Charter Treaty provides one of the clearest examples of an international framework for cross-border energy infrastructure.

Article 7 concerns energy transit. It covers energy transport facilities including high-pressure gas pipelines and high-voltage electricity transmission grids and lines. (Energy Charter Treaty)

The Treaty requires contracting parties to facilitate transit and encourages cooperation in:

modernising energy transport facilities;

developing infrastructure serving more than one country;

reducing the effects of supply interruptions; and

facilitating interconnection of energy facilities. (Energy Charter Treaty)

This creates an important international-law foundation for cross-border infrastructure cooperation.

4. Transit and Security of Supply

Cross-border infrastructure treaties must balance freedom of transit with national energy security.

Article 7(5) ECT recognises that a transit State is not required to permit construction or additional transit where it can demonstrate that this would endanger the security or efficiency of its energy system, including security of supply. (Energy Charter Treaty)

This shows that infrastructure treaties do not provide unlimited access. They attempt to balance:

Cross-border trade
↕
Infrastructure access
↕
National energy security

This balance is particularly important where a State fears that additional infrastructure could create operational or supply risks.

5. Intergovernmental and Host-Government Agreements

Large infrastructure projects often require agreements beyond a general international treaty.

The Energy Charter framework has developed model agreements for cross-border pipelines, including:

an Intergovernmental Pipeline Model Agreement, dealing with State-to-State arrangements; and

a Host Government Pipeline Model Agreement, dealing with arrangements between a State and project investors. (Energy Charter Treaty)

Such agreements can address taxation, land access, construction, environmental matters, customs, security, ownership and dispute settlement.

Therefore, a major cross-border project can have several layers of legal regulation:

International treaty
↓
Intergovernmental agreement
↓
Host-government agreement
↓
Project contracts
↓
National energy and environmental law

6. Electricity Interconnectors

Electricity infrastructure presents particular challenges because electricity flows continuously and cannot easily be stored at grid scale.

Cross-border electricity treaties or agreements may therefore address:

interconnector construction;

transmission capacity;

grid operation;

maintenance;

balancing;

emergency assistance;

congestion management;

data exchange; and

regulatory cooperation.

The Energy Charter Secretariat has also developed model guidelines for cross-border electricity projects dealing with market and system interoperability. (Energy Charter Treaty)

7. Dispute Resolution

A major part of infrastructure treaties is the dispute-resolution mechanism.

Under Article 7 ECT, certain transit disputes can be referred to a specialised conciliation process. The Secretary-General may appoint a conciliator, who attempts to assist the parties in reaching a resolution. (Energy Charter Treaty)

The Treaty also provides that, during certain transit disputes, existing energy flows should not simply be interrupted before the relevant dispute-resolution procedures are completed, subject to the Treaty and applicable contractual arrangements. (Energy Charter Treaty)

This is important because abruptly stopping energy flows can cause serious consequences for neighbouring countries.

8. Important Case Laws

Poland v Commission, Case T-883/16

This case concerned the OPAL gas pipeline, which connects the Nord Stream system with the European gas network.

Poland challenged a Commission decision concerning the conditions for access to the pipeline. The General Court annulled the Commission decision, finding that the Commission had failed to properly consider the principle of energy solidarity and its effects on other Member States. (Infocuria)

Relevance

The case demonstrates that decisions concerning major cross-border infrastructure cannot necessarily be considered only from the perspective of the country where the infrastructure is physically located. They may have consequences for neighbouring States and the wider regional energy system.

Germany v Poland, Case C-848/19 P

The CJEU subsequently considered the OPAL dispute and confirmed the importance of the principle of energy solidarity in EU energy policy. The Court held that EU energy measures must be assessed in light of that principle. (curia)

Relevance

This case is particularly important for cross-border infrastructure governance because it connects infrastructure regulation with regional energy security and solidarity between Member States.

Baltic Cable, Case C-454/18

The case concerned the Baltic Cable electricity interconnector between Sweden and Germany. The CJEU examined EU rules concerning revenues generated through allocation of cross-border transmission capacity.

Relevance

It demonstrates that cross-border electricity infrastructure requires common rules concerning interconnector revenues, network regulation and cross-border electricity flows.

Aquind v ACER, Case C-46/21 P

The case concerned the proposed Aquind electricity interconnector between Great Britain and France. The CJEU examined ACER's regulatory review and the role of its Board of Appeal in assessing complex technical and economic issues.

Relevance

The case illustrates that cross-border infrastructure governance requires not only international agreements but also clear regulatory powers and effective review mechanisms.

9. Major Legal Challenges

Different National Laws

A pipeline or cable may cross countries with different environmental, planning, taxation and energy laws.

Regulatory Jurisdiction

It may be difficult to determine which regulator has authority over infrastructure crossing or connecting two countries.

Security of Supply

A transit State may have domestic energy-security concerns that conflict with the interests of the exporting or importing State.

Environmental Protection

Cross-border projects may affect protected areas, marine environments, land and communities, requiring coordinated environmental standards.

Political and Investment Risks

Long-term infrastructure projects require substantial investment. Changes in government policy or regulation can create disputes between States, investors and operators.

10. Conclusion

Cross-border infrastructure treaties provide the international legal foundation for developing and operating energy infrastructure between countries. They establish rules concerning transit, interconnection, access, investment, security, cooperation and dispute resolution.

The Energy Charter Treaty, particularly Article 7, illustrates how international law can facilitate energy transit while preserving a State's ability to protect its energy system. (Energy Charter Treaty)

The cases Poland v Commission, Germany v Poland, Baltic Cable and Aquind demonstrate that cross-border infrastructure is not merely a technical matter. It raises questions of energy solidarity, regulatory jurisdiction, infrastructure access, security of supply and effective legal review.

For PhD-level energy law, the central issue is how international treaties can create stable and predictable rules for infrastructure that physically crosses borders while balancing national sovereignty, regional energy security, investment interests and environmental responsibilities.