Energy Security and Economic Diplomacy

1. Introduction

Energy security refers to the ability of a State to obtain reliable, continuous and affordable access to energy resources necessary for economic activity, national defence, public welfare and industrial development. The International Energy Agency commonly describes energy security in terms of the uninterrupted availability of energy sources at an affordable price.

Economic diplomacy, in the energy context, means the use of diplomatic relations, trade agreements, investment treaties, development partnerships, strategic alliances and State-backed commercial arrangements to secure energy supplies, infrastructure, technology, finance and market access.

The two concepts are deeply interconnected. A State dependent on imported oil, natural gas, uranium, critical minerals or energy technologies cannot achieve energy security purely through domestic regulation. It must also negotiate internationally. Energy law therefore extends beyond licensing, tariffs and environmental regulation into foreign policy, international trade, investment law and geopolitical strategy.

2. Energy Security as a Strategic Legal Objective

Energy security traditionally involves four major concerns:

• availability of sufficient energy resources;
• accessibility through infrastructure and international supply chains;
• affordability for consumers and industries; and
• reliability during crises, wars, sanctions or market disruptions.

Modern energy security also includes diversification. Dependence on one country, supplier, pipeline or fuel creates strategic vulnerability.

A State may therefore encourage:

multiple suppliers + multiple transport routes + strategic reserves + domestic production + renewable energy + international partnerships.

Energy diplomacy becomes the instrument through which these objectives are pursued.

3. Economic Diplomacy Through Long-Term Energy Agreements

Long-term oil and gas supply agreements are classic instruments of energy diplomacy.

Governments may support national energy companies in negotiating contracts that guarantee:

• minimum quantities;
• predictable pricing formulas;
• priority supply;
• infrastructure cooperation;
• strategic storage; and
• long-term commercial relationships.

Such agreements transform ordinary commercial transactions into elements of broader foreign policy.

A contemporary example is the strengthening of India–Mauritius energy cooperation. In 2026, IndianOil entered into a five-year arrangement to supply Mauritius with petroleum products in the context of broader government-to-government energy cooperation. The arrangement illustrates how State-backed energy companies can function as instruments of economic diplomacy as well as commercial enterprises.

4. Diversification as Economic Diplomacy

A major principle of modern energy security is:

“Do not depend excessively on one supplier, fuel or transport route.”

States therefore use diplomacy to diversify imports across different regions.

For example, an oil-importing State may maintain relationships simultaneously with:

• Gulf producers;
• African producers;
• Russia and Central Asia;
• the United States;
• Latin American suppliers; and
• neighbouring countries.

Similarly, natural-gas security may involve pipelines, LNG terminals, storage arrangements and cross-border interconnections.

The strategic benefit is that disruption in one relationship does not automatically become a national energy crisis.

Recent European experience demonstrates the importance of diversification. The EU substantially reduced its dependence on Russian gas after 2022, illustrating how geopolitical crises can rapidly transform energy-security policy, trade relations and infrastructure planning.

5. Case Law: Eni SpA and Others v Premier ministre, Case C-226/16

This is an important European decision directly concerning security of gas supply.

France required natural-gas suppliers to maintain gas stocks to protect consumers during supply emergencies.

The CJEU accepted that Member States could impose additional storage obligations for security-of-supply purposes. However, EU law prevented France from requiring those obligations to be fulfilled necessarily and exclusively through infrastructure located within French territory.

Legal Principle

The case demonstrates that:

energy security is a legitimate governmental objective, but measures adopted in its name must remain compatible with wider regional and international market obligations.

It also illustrates the diplomatic character of modern energy security. Security need not always be achieved through complete national self-sufficiency; it can be achieved through regional cooperation and cross-border infrastructure.

6. Energy Infrastructure and Diplomatic Power

Pipelines, electricity interconnectors, LNG terminals and transmission networks create long-term relationships between States.

A pipeline may cross several jurisdictions. Consequently, its operation may require:

• transit agreements;
• intergovernmental treaties;
• regulatory coordination;
• investment guarantees;
• dispute-settlement provisions;
• tariff arrangements; and
• security commitments.

Infrastructure therefore creates both interdependence and bargaining power.

A transit State may acquire strategic influence because another State's energy supply passes through its territory.

Conversely, excessive reliance on one transit route can become a national-security vulnerability.

7. Energy Trade and International Economic Law

Economic diplomacy must also operate within international trade rules.

Energy-exporting States may impose:

• export restrictions;
• subsidies;
• local-content requirements;
• discriminatory taxation;
• licensing restrictions; or
• State-enterprise preferences.

Energy-importing States may respond through trade negotiations or international dispute settlement.

Energy security therefore interacts with principles under WTO law concerning:

non-discrimination, quantitative restrictions, subsidies, national treatment and market access.

The important tension is that governments often justify intervention through national energy security, while international economic law seeks to prevent disguised protectionism.

8. Foreign Investment and Energy Security

Large energy projects require enormous capital investment.

Foreign investors may finance:

• oil and gas exploration;
• pipelines;
• LNG terminals;
• solar projects;
• wind farms;
• nuclear power;
• transmission systems; and
• battery manufacturing.

Economic diplomacy therefore frequently involves bilateral investment treaties and investment-protection agreements.

But tension arises when a government later changes its energy policy.

For example, a State may:

• cancel licences;
• impose windfall taxes;
• withdraw subsidies;
• nationalise infrastructure; or
• restrict foreign ownership.

Investors may then invoke investment treaties and international arbitration.

Thus, energy diplomacy must balance sovereign regulatory autonomy against the need to maintain investor confidence.

9. Energy Security Versus Free Movement and Market Integration

Security policies sometimes conflict with liberalised regional markets.

The Eni decision is important precisely because it rejected the assumption that security necessarily requires purely domestic storage. The CJEU held that national legislation could not compel suppliers to satisfy security obligations exclusively through domestic infrastructure where EU rules permitted regional or Union-level fulfilment.

This produces a broader principle:

Interdependence can itself become a form of energy security.

Instead of every State becoming completely self-sufficient, neighbouring States may create integrated electricity and gas markets that allow them to assist one another during shortages.

10. Strategic Petroleum and Gas Reserves

States frequently maintain strategic energy reserves as protection against:

• war;
• sanctions;
• embargoes;
• natural disasters;
• shipping disruptions; and
• sudden price shocks.

Strategic reserves also possess diplomatic significance.

A government may release reserves together with other countries to stabilise markets. Coordinated releases therefore operate as an instrument of collective economic diplomacy.

Energy security thus involves not merely acquiring fuel but controlling the timing and conditions under which stored energy enters the market.

11. Renewable Energy as Economic Diplomacy

Renewables are transforming the meaning of energy diplomacy.

Traditional energy diplomacy concentrated on obtaining oil and gas. Modern diplomacy increasingly concerns:

• solar technology;
• wind equipment;
• batteries;
• critical minerals;
• green hydrogen;
• electricity interconnections;
• climate finance; and
• technology transfer.

Renewable energy can reduce fossil-fuel import dependence, but it may create new dependencies on minerals such as lithium, cobalt, nickel, copper and rare-earth elements.

Energy diplomacy therefore increasingly resembles technology and supply-chain diplomacy.

12. India and Energy Economic Diplomacy

India provides an important illustration because rapid economic development creates enormous energy demand while significant parts of its fossil-fuel requirements depend on international markets.

Indian energy diplomacy consequently seeks to combine:

energy affordability + diversification + strategic autonomy + international partnerships + renewable expansion.

India's relationships with oil- and gas-producing States, overseas energy investments, LNG agreements, renewable-energy cooperation and international initiatives all form part of this broader strategy.

Economic diplomacy also enables India to avoid excessive dependence on any single geopolitical bloc.

The objective is not absolute isolation from international markets but strategic diversification within international interdependence.

13. Energy Security and Sanctions

Economic sanctions reveal particularly clearly the relationship between diplomacy and energy law.

Energy-producing States may use exports as geopolitical leverage, while importing States may impose:

• import bans;
• price restrictions;
• financial sanctions;
• technology restrictions; and
• shipping limitations.

However, sanctions can generate secondary consequences such as:

• higher domestic energy prices;
• supply shortages;
• rerouting of global trade;
• emergence of alternative payment arrangements; and
• increased dependence on new suppliers.

Thus, economic diplomacy must constantly balance foreign-policy objectives against domestic energy-security consequences.

14. Energy Security, Climate Policy and Economic Diplomacy

Twenty-first-century diplomacy must reconcile three objectives:

Energy Security + Economic Development + Decarbonisation

These goals sometimes reinforce one another. Domestic renewable generation may reduce both emissions and fossil-fuel dependence.

But conflicts also arise. During an energy crisis, governments may temporarily increase coal, oil or gas consumption even while pursuing long-term climate objectives.

Energy diplomacy therefore involves managing different time horizons:

short-term supply security, medium-term economic stability and long-term environmental sustainability.

15. Broader Legal Significance

Energy security and economic diplomacy demonstrate that energy law cannot be understood purely as domestic public-utility regulation.

It operates simultaneously across:

Domestic Regulation → International Trade → Investment Law → Foreign Policy → Infrastructure Diplomacy → Climate Governance → National Security.

The State is therefore both a regulator and strategic actor.

Contracts, treaties, infrastructure projects, sanctions, subsidies and supply arrangements all become tools through which governments manage geopolitical vulnerability.

Conclusion

Energy security and economic diplomacy are fundamentally interconnected because modern States cannot secure their energy systems entirely through domestic resources or domestic law.

Energy security requires reliable, affordable and diversified energy supplies, while economic diplomacy provides the international mechanisms through which those supplies, technologies, investments and infrastructures are obtained.

The decision in Eni SpA and Others v Premier ministre, Case C-226/16 demonstrates an important legal principle: governments may impose measures designed to safeguard security of supply, but those measures must remain compatible with broader market and regional legal obligations. Energy security does not necessarily require national isolation; regional cooperation itself may strengthen resilience.

Therefore, contemporary energy diplomacy involves much more than negotiating oil purchases. It includes diversification of suppliers, strategic reserves, cross-border infrastructure, foreign investment, renewable-energy partnerships, critical-mineral supply chains, sanctions management and climate cooperation.

Ultimately, energy law in this field governs the relationship between economic interdependence and strategic autonomy. A successful energy-security strategy does not attempt to eliminate international dependence altogether. Instead, it seeks to structure that dependence so that no single supplier, country, technology or route can threaten the economic and political stability of the State.