Introduction

International electricity trade occurs when electricity is transferred across national borders through interconnected transmission networks. Unlike ordinary trade in many physical goods, electricity is highly dependent on real-time balancing, transmission capacity, grid stability, technical standards, market rules and cross-border infrastructure. Consequently, international electricity trade is governed by a combination of international trade law, energy treaties, environmental law, investment law, regional integration rules and general principles of international law.

The principal legal principles include non-discrimination, freedom of transit, national treatment, most-favoured-nation treatment, sovereign control over natural resources and infrastructure, good faith, environmental protection, sustainable development, regulatory cooperation, market access, protection of investments, and peaceful dispute settlement.

1. Principle of Non-Discrimination

Non-discrimination is one of the fundamental principles affecting international electricity trade. States participating in cross-border electricity markets should not discriminate arbitrarily between foreign and domestic economic actors where applicable treaty obligations prohibit such discrimination.

Under the WTO framework, GATT Article III establishes national-treatment obligations concerning internal measures, while GATT Article I contains the most-favoured-nation principle.

For electricity markets, the principle may become relevant where a state:

gives domestic electricity producers preferential treatment;

restricts foreign electricity suppliers;

imposes discriminatory network-access charges;

provides preferential subsidies to domestic generators; or

requires foreign investors to use domestic equipment.

Case: Canada — Renewable Energy / Feed-In Tariff Program

The WTO disputes concerning Ontario's Feed-in Tariff Programme are particularly important. Japan and the European Union challenged Canadian requirements that electricity generators use specified levels of domestic equipment to qualify for guaranteed electricity prices.

The WTO Panel found violations concerning Article III:4 of GATT and the TRIMs Agreement. The Appellate Body subsequently modified some aspects of the Panel's reasoning concerning the government-procurement exception, while the central issues concerning discriminatory domestic-content requirements remained highly significant. (World Trade Organization)

The case demonstrates that electricity-support programmes cannot necessarily be insulated from international trade disciplines merely because they pursue energy-policy objectives.

2. National Treatment

National treatment requires, where applicable, imported products or foreign economic actors to receive treatment no less favourable than comparable domestic products or actors.

This principle can affect electricity trade through:

access to electricity markets;

licensing requirements;

grid-access rules;

taxation;

renewable-energy support schemes;

procurement rules; and

technical requirements.

India — Certain Measures Relating to Solar Cells and Solar Modules

In India — Solar Cells, the United States challenged India's domestic-content requirements under its Jawaharlal Nehru National Solar Mission.

The WTO Panel concluded that India's requirements were inconsistent with GATT Article III:4 and the TRIMs Agreement. The Appellate Body upheld the relevant conclusions and rejected India's reliance on certain GATT exceptions. (World Trade Organization)

Although the dispute concerned solar-generation equipment rather than cross-border electricity sales themselves, it demonstrates an important principle: national energy policy may remain subject to international trade obligations when it discriminates against imported goods.

3. Most-Favoured-Nation Treatment

The MFN principle requires WTO Members, subject to applicable exceptions, to extend advantages granted to one trading partner to like products from other WTO Members.

For electricity trade, MFN can become relevant where states establish:

preferential electricity-import arrangements;

discriminatory customs or border measures;

preferential treatment for electricity from particular states;

differential charges for comparable cross-border trade.

Regional electricity markets may nevertheless operate under special arrangements because WTO law permits certain forms of regional economic integration under specified conditions.

4. Freedom of Transit

Electricity is particularly dependent upon transit because electricity generated in one country may have to cross another country's transmission network before reaching the final market.

The Energy Charter Treaty (ECT) contains a specific energy-transit principle. Article 7 requires Contracting Parties to facilitate transit of energy materials and products consistently with freedom of transit and without discrimination based on origin, destination or ownership. It also prohibits unreasonable delays, restrictions and charges. Importantly, the ECT expressly defines energy transport facilities to include high-voltage electricity transmission grids and lines. (Energy Charter Treaty)

This makes freedom of transit particularly important for:

international interconnectors;

electricity wheeling;

regional electricity markets;

offshore transmission networks;

electricity exchanges; and

transit through third countries.

The WTO framework also contains a general freedom-of-transit provision in GATT Article V. However, the precise application of Article V to electricity grids raises difficult legal questions because electricity and fixed transmission infrastructure do not fit neatly into traditional concepts of "traffic in transit." WTO analysis has identified these difficulties, while the ECT provides a more energy-specific framework. (World Trade Organization)

5. Open and Non-Discriminatory Grid Access

Cross-border electricity trade is impossible without access to transmission networks. Consequently, international electricity law increasingly incorporates principles of:

third-party access;

transparent network tariffs;

non-discriminatory interconnection;

capacity allocation;

congestion management; and

transparent technical rules.

The legal principle does not necessarily mean that every state must provide unlimited access to every transmission facility. Rather, where international obligations apply, access conditions should generally be transparent, reasonable and non-discriminatory.

The ECT illustrates this approach by requiring cooperation concerning energy transport facilities while simultaneously preserving states' rights and obligations under other international-law rules. (Energy Charter Treaty)

6. Principle of Sovereignty

Electricity trade remains subject to state sovereignty.

A state retains authority over:

its electricity-generation resources;

national transmission networks;

electricity-market regulation;

environmental standards;

energy security;

licensing;

taxation; and

national infrastructure.

International electricity trade therefore does not eliminate national regulatory authority.

The important legal question is the balance between sovereignty and international obligations. Once a state has entered into treaties concerning trade, investment, transit or environmental protection, its regulatory discretion may be constrained by those commitments.

7. Good Faith and Pacta Sunt Servanda

The principle of pacta sunt servanda requires treaties to be performed in good faith. It is codified in Article 26 of the Vienna Convention on the Law of Treaties.

This principle is particularly important in long-term electricity arrangements because cross-border electricity projects frequently involve:

intergovernmental agreements;

power purchase agreements;

transmission agreements;

interconnector agreements;

investment treaties; and

regional electricity-market treaties.

States cannot ordinarily invoke domestic law as a justification for failure to perform an international treaty obligation.

Good faith also supports cooperation in the interpretation and implementation of cross-border energy arrangements.

8. Environmental Protection and Prevention of Transboundary Harm

Electricity projects may have significant environmental consequences, especially:

hydropower;

nuclear power;

thermal generation;

transmission corridors;

offshore wind;

cross-border interconnectors; and

large renewable-energy installations.

International environmental law therefore imposes important constraints on electricity development and trade.

A central principle is the duty to prevent significant transboundary environmental harm.

Pulp Mills on the River Uruguay (Argentina v. Uruguay)

In Pulp Mills, the ICJ examined obligations concerning activities capable of affecting a shared transboundary resource. The Court emphasised procedural cooperation and environmental assessment obligations. The Court concluded that Uruguay had breached procedural obligations relating to notification and cooperation, while finding no breach of the substantive environmental obligations in the particular circumstances. (International Court of Justice)

The case is relevant to electricity infrastructure because a cross-border energy project may affect:

rivers;

ecosystems;

fisheries;

air quality;

marine environments; and

neighbouring states.

The ICJ also recognised the importance of environmental impact assessment where a proposed activity presents a risk of significant adverse transboundary impact. (International Court of Justice)

9. Sustainable Development

International electricity trade increasingly operates within the concept of sustainable development.

Electricity systems must reconcile several objectives:

reliable electricity supply;

economic development;

affordable energy;

environmental protection;

decarbonisation;

energy security; and

protection of affected communities.

International trade law therefore interacts with climate and environmental law.

For example, renewable-energy subsidies may pursue legitimate environmental objectives but may still have to comply with applicable trade obligations, as illustrated by the Canada renewable-energy litigation.

The WTO litigation also demonstrates the difficulty of balancing environmental objectives with non-discrimination rules. (World Trade Organization)

10. Transparency and Regulatory Cooperation

Cross-border electricity markets require regulatory cooperation because electricity cannot be traded effectively where neighbouring states apply completely incompatible rules.

International cooperation may concern:

licensing;

transmission charges;

balancing;

system operation;

technical standards;

electricity-market codes;

emergency procedures;

congestion management;

renewable-energy certificates; and

information exchange.

Transparency is therefore an important legal principle. Market participants require predictable rules concerning access, pricing and network operation.

11. Energy Security

Electricity is an essential service and therefore states may impose measures designed to protect national energy security.

International law nevertheless requires such measures to operate within applicable treaty obligations.

Energy-security measures may involve:

emergency restrictions on electricity exports;

reserve requirements;

restrictions on foreign ownership;

strategic infrastructure protection;

emergency grid intervention;

cybersecurity measures; and

limitations on dependence upon foreign electricity supplies.

The legal difficulty arises where an energy-security measure restricts international trade. The state may need to demonstrate that the measure is authorised under the applicable treaty or falls within a relevant exception.

12. General Exceptions

International trade law recognises circumstances in which otherwise restrictive measures may be justified.

GATT Article XX, for example, contains exceptions relating to matters including:

protection of human, animal or plant life or health;

conservation of exhaustible natural resources;

public morals; and

compliance with certain laws and regulations.

However, reliance on an exception is not automatic. The measure must satisfy the relevant requirements of the particular exception and the introductory requirements of Article XX.

India — Solar Cells

India attempted to rely on GATT Article XX(d) and XX(j) in defending its solar domestic-content measures. The WTO Panel rejected those arguments, and the Appellate Body upheld the relevant conclusions. (World Trade Organization)

This illustrates that energy security and renewable-energy objectives do not automatically override trade obligations.

13. Investment Protection

Cross-border electricity trade normally requires substantial investment in:

generation;

transmission lines;

interconnectors;

substations;

storage;

offshore infrastructure; and

grid-control systems.

International investment law may therefore become relevant.

Investment treaties can provide standards such as:

fair and equitable treatment;

protection against unlawful expropriation;

non-discrimination;

full protection and security;

free transfer of funds; and

investor-state dispute settlement where applicable.

Changes in electricity tariffs, withdrawal of subsidies or nationalisation of electricity infrastructure can consequently generate international investment disputes.

However, investment protection must be considered alongside the state's right to regulate in the public interest, as interpreted under the particular treaty and applicable arbitral jurisprudence.

14. Regulatory Autonomy and the Right to Regulate

Electricity markets are heavily regulated because electricity has characteristics that distinguish it from many ordinary commodities.

States may regulate electricity to protect:

consumers;

system reliability;

public health;

environmental interests;

energy security;

competition; and

affordability.

International law does not generally require states to abandon such regulation. Instead, the legality of regulatory measures depends upon the applicable international commitments.

This is particularly important because a measure can be legitimate as a matter of domestic electricity policy while still creating an international-law issue.

15. Dispute Settlement

International electricity trade agreements require mechanisms for resolving disputes.

Possible mechanisms include:

State-to-state dispute settlement

States may bring disputes before:

WTO dispute settlement bodies;

the International Court of Justice;

treaty-specific panels;

regional courts; or

diplomatic mechanisms.

Investor-state arbitration

Where an applicable investment treaty permits it, investors may bring claims concerning government measures affecting energy investments.

Commercial arbitration

Cross-border PPAs and transmission agreements commonly provide for commercial arbitration concerning:

payment;

curtailment;

transmission obligations;

force majeure;

termination; and

contractual interpretation.

Important Case Laws

Conclusion

International electricity trade is governed by a multi-layered legal framework rather than by one single body of international electricity law. The principal principles are:

Non-discrimination

National treatment

Most-favoured-nation treatment

Freedom of transit

Non-discriminatory grid access

State sovereignty

Good faith and treaty performance

Prevention of transboundary environmental harm

Environmental impact assessment

Sustainable development

Transparency and regulatory cooperation

Energy security

Investment protection

The right to regulate

International dispute settlement

The distinctive feature of electricity trade is that trade law cannot be separated from infrastructure law, environmental law and energy regulation. Electricity must physically move through interconnected networks, so legal rules concerning transit, grid access, system reliability and environmental protection are as important as conventional rules concerning tariffs and discrimination. The ECT is particularly significant because its Article 7 expressly addresses energy transit through high-voltage electricity grids, while WTO jurisprudence demonstrates how national energy policies can be constrained by international trade disciplines. (Energy Charter Treaty)

Thus, the emerging international legal framework seeks to reconcile open electricity markets and cross-border trade with national sovereignty, energy security, environmental protection and sustainable development.