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INTERNATIONAL ECONOMIC LAW
GPR 3405
The Foundations of International Economic Law
1. THE CONCEPT OF INTERNATIONAL ECONOMIC LAW (IEL) AND THE
INTERNATIONAL ECONOMIC ORDER
Introduction International Economic Law (IEL) is a branch of international law that regulates economic relations among states, international organizations, multinational corporations, and private economic actors operating across national borders. It governs the legal framework within which international trade, foreign investment, finance, monetary relations, and economic cooperation are conducted. The rapid growth of globalization, technological advancement, and interdependence among states has made IEL one of the most significant areas of contemporary international law. IEL developed primarily after the Second World War when states recognized the need for an organized international economic system capable of preventing economic instability, trade protectionism, and financial crises. This led to the establishment of major international economic institutions such as the International Monetary Fund (IMF), the World Bank, and later the General Agreement on Tariffs and Trade (GATT), which eventually evolved into the World Trade Organization (WTO). The international economic order refers to the global framework of institutions, rules, policies, and relationships governing economic interaction among nations. It encompasses the principles and mechanisms through which international trade, finance, investment, and development are regulated and coordinated globally.
1. Meaning of International Economic Law International Economic Law refers to the body of legal rules, principles, treaties, customs, and institutional arrangements that govern international economic transactions and relations among states and other international economic actors. According to Andreas Lowenfeld, IEL concerns the law governing international economic transactions and the movement of goods, services, capital, and technology across borders. Mathias Herdegen defines IEL as the legal framework governing transnational economic relations involving both states and private actors. The subject
therefore combines aspects of public international law, private international law, trade law, investment law, financial law, and development law. IEL regulates a wide range of economic activities including: international trade in goods and services; foreign direct investment; international monetary relations; intellectual property rights; regional economic integration; international business transactions; development finance; and economic dispute settlement. Its primary objective is to establish predictability, fairness, cooperation, and stability within the international economic system. THE CONCEPT OF THE INTERNATIONAL ECONOMIC ORDER Introduction According to Matthias Herdegen , the international economic order represents “the legal and institutional framework governing transboundary economic relations among states and private actors.” He explains that the modern economic order is built upon interconnected systems of trade liberalization, investment protection, monetary cooperation, and global economic governance. Andreas Lowenfeld describes the international economic order as the structure through which states attempt to regulate and coordinate economic interdependence in a globalized world. He argues that the international economy cannot function effectively without rules and institutions capable of facilitating cooperation and reducing economic conflict among states. Asif Qureshi and Andreas Ziegler define the international economic order as the arrangement of international legal and institutional mechanisms regulating global economic relations and balancing the interests of developed and developing states. The concept developed significantly after the Second World War when states recognized the need for an organized and cooperative international economic system capable of preventing economic crises, trade wars, and financial instability. As a result, major international economic institutions such as the International Monetary Fund (IMF), the World Bank, and the General Agreement on Tariffs and Trade (GATT) were established. These institutions later became central pillars of the modern international economic order.
The International Court of Justice held that the principle of sovereignty prohibits states from intervening directly or indirectly in the internal affairs of another state. The Court emphasized that every state has the sovereign right to freely determine its political, economic, and social system without external interference. The case became a landmark authority because it reinforced the idea that states possess exclusive authority over their economic and domestic affairs. It remains one of the most important cases on sovereignty and non-intervention in international law.
2. Principle of Trade Liberalization The principle of trade liberalization promotes the reduction or elimination of barriers to international trade such as tariffs, quotas, import restrictions, and discriminatory trade practices. The principle is based on the belief that free trade encourages economic growth, competition, efficiency, and international cooperation. Trade liberalization forms the foundation of the World Trade Organization system. Through agreements such as GATT, states commit themselves to lowering trade barriers and promoting freer trade relations. The principle seeks to create a predictable and open international trading system where goods and services can move more freely across borders. Landmark Case: United States — Standards for Reformulated and Conventional Gasoline WT/DS2/AB/R (1996) In this case, the United States introduced environmental regulations concerning the quality of gasoline sold in its market. Venezuela and Brazil challenged these regulations before the WTO, arguing that the rules unfairly discriminated against imported gasoline while favoring domestic producers. The WTO Appellate Body held that although states have the right to protect the environment, they must do so in a manner consistent with international trade obligations. The Appellate Body found that the United States had applied its environmental regulations in a discriminatory manner that unjustifiably restricted international trade. The significance of the case lies in the fact that it clarified that trade liberalization remains a central objective of the WTO system and that states should avoid unnecessary or discriminatory trade restrictions.
3. Principle of Non-Discrimination The principle of non-discrimination requires states to treat foreign goods, services, investors, and trading partners fairly and equally. It is one of the most important principles within WTO law and operates mainly through the Most-Favoured-Nation (MFN) principle and the National Treatment principle. Under the MFN principle, any trade advantage granted to one WTO member must be extended to all WTO members equally. Under National Treatment, imported goods should not be treated less favorably than domestic goods after entering the market. The principle seeks to prevent protectionism and unfair discrimination in international trade relations. Landmark Case: Japan — Taxes on Alcoholic Beverages WT/DS8, 10, 11/AB/R (1996) In this dispute, the United States, European Communities, and Canada challenged Japan’s taxation system on alcoholic beverages. Japan imposed higher taxes on imported alcoholic drinks such as vodka and whisky while imposing lower taxes on locally produced beverages like shochu. The WTO Appellate Body held that Japan’s taxation system violated the National Treatment principle under Article III of GATT because imported products were subjected to less favorable treatment than similar domestic products. The case became a landmark authority because it clarified the meaning of non- discrimination and established that states cannot use internal taxation measures to indirectly protect domestic industries against foreign competition. 4. Principle of Fair and Equitable Treatment The principle of fair and equitable treatment requires host states to treat foreign investors in a fair, transparent, predictable, and non-arbitrary manner. It protects investors against unfair government conduct such as discrimination, abuse of power, denial of justice, or sudden regulatory changes. This principle is one of the most important standards in international investment law and is commonly included in Bilateral Investment Treaties.
6. Principle of Pacta Sunt Servanda The principle of pacta sunt servanda means that agreements must be respected and performed in good faith. It is one of the oldest and most fundamental principles of international law. Within International Economic Law, this principle ensures that states honor obligations arising from trade agreements, investment treaties, and financial arrangements. Without this principle, international economic cooperation would become unstable and unpredictable. Landmark Case: Factory at Chorzów (Germany v Poland) PCIJ (1928) This case involved the unlawful expropriation of a German-owned factory by Poland. Germany argued that Poland had violated international obligations by taking over the factory without proper compensation. The Permanent Court of International Justice held that breach of an international obligation creates a duty to make full reparation. The Court explained that international obligations must be respected and that states are legally responsible for violations of treaty commitments. The case remains one of the most authoritative decisions on treaty obligations and state responsibility in international law. 7. Principle of Sustainable Development The principle of sustainable development requires states to balance economic growth with environmental protection and social welfare. Modern International Economic Law recognizes that economic activities such as trade, industrialization, and investment should not destroy the environment or compromise the needs of future generations. The principle emerged due to growing concerns over: climate change; environmental degradation; pollution; and overexploitation of natural resources.
Sustainable development has increasingly become part of international trade and investment regulation. International institutions such as the WTO now recognize that environmental protection can be a legitimate objective even within trade liberalization. Landmark Case: United States — Import Prohibition of Certain Shrimp and Shrimp Products WT/DS58/AB/R (1998) In this case, the United States prohibited the importation of shrimp harvested using methods that endangered sea turtles. Several Asian countries challenged the measure before the WTO, arguing that it violated international trade rules. The WTO Appellate Body acknowledged that environmental protection and sustainable development are legitimate concerns under international trade law. However, it held that environmental measures must not be applied in an arbitrary or discriminatory manner. The case became a landmark authority because it recognized that trade liberalization must be balanced with environmental protection and sustainable development objectives.
8. Principle of Economic Cooperation The principle of economic cooperation recognizes that states must cooperate in addressing global economic challenges such as trade instability, poverty, financial crises, debt burdens, and economic development. Due to globalization and economic interdependence, no state can effectively manage international economic problems alone. International Economic Law therefore encourages cooperation through international institutions such as: the WTO; IMF; World Bank; and regional economic organizations. Economic cooperation promotes: global economic stability; peaceful economic relations; development; and international integration.
According to liberalism, when states engage freely in international trade, each state specializes in producing goods and services in which it has comparative advantage. As a result, global production increases and all participating states benefit economically. Liberal theorists therefore support the reduction of tariffs, quotas, and other trade barriers that interfere with international commerce. The liberal theory greatly influenced the establishment of institutions such as the World Trade Organization, the International Monetary Fund, and the World Bank after the Second World War. These institutions were designed to promote economic cooperation, trade liberalization, and stable international economic relations. Liberalism also views economic interdependence as a mechanism for promoting peace. According to this view, states that are economically interconnected are less likely to engage in conflict because war would disrupt mutually beneficial economic relations. However, critics argue that liberalism often benefits economically powerful states more than weaker developing countries. Developing states sometimes struggle to compete with industrialized economies, and unrestricted free trade may weaken local industries and increase dependency on foreign markets. Despite these criticisms, liberalism remains the dominant theory underlying the modern international economic system and WTO trade rules.
2. Mercantilist Theory The mercantilist theory views economic relations as a competition among states for wealth, power, and national advantage. Unlike liberalism, which emphasizes cooperation and mutual benefit, mercantilism sees the international economy as a struggle in which one state’s gain may become another state’s loss. Mercantilists believe that economic power is essential for national security and political strength. For this reason, states should actively protect their domestic economies and industries through government intervention. According to this theory, a state should maximize exports while minimizing imports in order to accumulate wealth and strengthen national power. Mercantilism supports the use of tariffs, subsidies, import restrictions, and protectionist policies to protect local industries from foreign competition. States are therefore encouraged to intervene directly in economic affairs whenever necessary to preserve national interests.
Although the modern international economic system generally supports free trade, mercantilist ideas continue to influence many governments today. States often adopt protectionist policies when domestic industries face foreign competition or when national security concerns arise. Trade disputes between major economies such as the United States and China reflect modern mercantilist thinking because each state seeks to protect strategic industries and economic interests. Critics of mercantilism argue that excessive protectionism may reduce international cooperation, limit consumer choice, and create trade wars that harm the global economy.
3. Marxist Theory The Marxist theory provides a critical view of the international economic system. According to Marxist scholars, International Economic Law largely serves the interests of capitalist and industrialized countries while exploiting poorer and developing states. Marxists argue that the global economy is structured in a way that allows wealthy states and multinational corporations to dominate international trade, investment, finance, and production. Developing countries often remain dependent on exporting raw materials while developed countries control technology, industrial production, and financial systems. The theory further argues that international institutions such as the IMF and World Bank sometimes promote policies that benefit developed capitalist economies while increasing economic dependency and inequality in poorer states. According to Marxists, globalization enables multinational corporations to accumulate wealth and influence while workers and weaker states remain economically disadvantaged. Marxist scholars therefore view the international economic order as a continuation of historical systems of exploitation that began during colonialism and imperialism. Walter Rodney’s work How Europe Underdeveloped Africa strongly reflects Marxist thinking because he argues that colonialism systematically impoverished Africa while enriching Europe. Marxist theory is important because it highlights the unequal distribution of wealth and power within the international economic system. However, critics argue that Marxism focuses too heavily on exploitation and class struggle while ignoring the economic benefits that international trade and investment may bring to developing countries. 4. Dependency Theory
relations. For example, the WTO provides rules regulating trade among states and offers a dispute settlement mechanism for resolving trade conflicts peacefully. Institutional theory also recognizes that international organizations help states cooperate in addressing global economic challenges such as financial crises, debt problems, climate change, and trade instability. However, critics argue that many international institutions are dominated by powerful developed countries and may not adequately represent the interests of developing states. Despite these criticisms, institutional theory remains highly influential in explaining the role of international organizations within the international economic order.
6. Neoliberal Theory The neoliberal theory is an advanced form of liberal economic thinking that strongly supports free markets, privatization, deregulation, and minimal government intervention in economic affairs. According to this theory, economic growth and development are best achieved when market forces operate freely without excessive state control. Neoliberal theorists believe that governments should reduce restrictions on trade and investment, privatize public enterprises, remove subsidies, and encourage competition within the economy. The theory became highly influential during the 1980s and 1990s, particularly through the policies of the International Monetary Fund (IMF) and the World Bank. Many developing countries were required to adopt neoliberal economic reforms under Structural Adjustment Programs (SAPs). These reforms involved liberalizing trade, reducing public expenditure, privatizing state-owned corporations, and encouraging foreign investment. Supporters of neoliberalism argued that such measures would improve efficiency, attract international capital, and stimulate economic growth. However, neoliberalism has been heavily criticized, especially by developing countries and social justice scholars. Critics argue that excessive liberalization often weakens domestic industries, increases unemployment, reduces government social services, and deepens economic inequality. In many African and Latin American countries, neoliberal reforms were associated with rising poverty and economic hardship. Despite these criticisms, neoliberal theory remains highly influential within modern globalization and international financial governance. 7. Realist Theory
The realist theory approaches International Economic Law from the perspective of power and national interest. Unlike liberal theories that emphasize cooperation and mutual benefit, realism argues that states primarily participate in international economic relations in order to protect and advance their own economic and political interests. According to realists, the international system is competitive in nature, and states constantly struggle to secure economic advantage and maintain national power. Realist theorists argue that powerful states often shape international economic rules and institutions according to their own interests. Institutions such as the WTO, IMF, and World Bank may therefore reflect the influence of economically dominant countries rather than genuine equality among states. Under realism, economic cooperation occurs only when it benefits national interests, and states may abandon free trade principles whenever strategic or economic interests are threatened. This theory helps explain why states sometimes impose economic sanctions, engage in trade wars, or adopt protectionist measures despite commitments to free trade. For example, the trade tensions between the United States and China reflect realist thinking because both states seek to protect strategic industries and maintain economic influence within the global economy. Although realism is important in explaining economic competition and state behavior, critics argue that it focuses too heavily on conflict and power while underestimating the importance of international cooperation and legal regulation within the international economic system.
8. Development Theory Development theory focuses on the role of International Economic Law in promoting economic and social development, particularly in developing countries. According to this theory, the international economic system should not merely promote free trade and market efficiency but should also address poverty, inequality, underdevelopment, and historical injustices affecting poorer nations. Development theorists argue that many developing countries remain disadvantaged within the global economy due to colonialism, unequal trade relations, debt dependency, and limited industrial capacity. Consequently, International Economic Law should create mechanisms that support economic growth and development in weaker economies. Such mechanisms may include preferential trade treatment, development financing, debt relief, technology transfer, and flexible economic obligations for developing states.
Important treaties within IEL include: the Marrakesh Agreement Establishing the World Trade Organization (WTO); the General Agreement on Tariffs and Trade (GATT); the General Agreement on Trade in Services (GATS); the Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS); Bilateral Investment Treaties (BITs); and regional trade agreements such as the East African Community Treaty and AfCFTA Agreement. Treaties are significant because they provide certainty, predictability, and stability within international economic relations. States are legally bound to comply with treaty obligations under the principle of pacta sunt servanda , which requires agreements to be performed in good faith. The importance of treaties was emphasized in Factory at Chorzów (Germany v Poland) PCIJ (1928), where the Permanent Court of International Justice held that breach of an international obligation gives rise to a duty to make reparation. The case reinforced the binding nature of international agreements within international law.
2. Customary International Law Customary international law consists of rules and practices that develop from consistent state practice accompanied by a belief that such practice is legally obligatory, known as opinio juris. Unlike treaties, customary international law does not require written agreements because it develops gradually through repeated conduct of states. In International Economic Law, customary international law plays an important role particularly in areas such as: state sovereignty over natural resources; state responsibility; expropriation of foreign property; diplomatic protection; and treatment of foreign investors. Customary rules become binding upon all states unless a state persistently objects during the formation of the custom. An important customary principle in IEL is the requirement that expropriation of foreign property must be accompanied by compensation. This rule developed largely through state practice and arbitral decisions before being incorporated into investment treaties.
The significance of customary international law was recognized in Texaco Overseas Petroleum Company v Libya (1977), where the tribunal relied on customary international law principles concerning state sovereignty and compensation for expropriation. The tribunal acknowledged that although states possess sovereignty over natural resources, they must exercise such powers consistently with international legal standards.
3. General Principles of Law General principles of law are legal principles recognized by civilized nations and applied within both domestic and international legal systems. These principles fill gaps where treaties or customary international law may not provide clear rules. In International Economic Law, general principles help ensure fairness, justice, and consistency in economic relations and dispute settlement. Examples of general principles commonly applied in IEL include: good faith; equity; fairness; due process; estoppel; and pacta sunt servanda. The principle of good faith is particularly important because states are expected to honor economic obligations honestly and fairly. International tribunals frequently apply these principles in trade and investment disputes. In Nuclear Tests Case (Australia v France) ICJ Reports 1974, the International Court of Justice emphasized that good faith is one of the fundamental principles governing international obligations. This principle continues to influence treaty interpretation and international economic relations. 4. Judicial Decisions and Arbitral Awards Judicial decisions and arbitral awards are also important sources of International Economic Law. Decisions from international courts and tribunals help interpret treaties, clarify legal principles, and develop international economic jurisprudence.
Although soft law lacks binding force, it often influences treaty negotiations, state practice, and the development of customary international law. For example, the Declaration on the Establishment of a New International Economic Order (NIEO) adopted by the United Nations General Assembly in 1974 significantly influenced debates concerning economic justice, sovereignty over natural resources, and development. Soft law is particularly important in areas such as: environmental governance; corporate social responsibility; sustainable development; and digital trade regulation.
6. Institutional Rules and Regulations International economic institutions generate rules, regulations, and policies that function as important sources of IEL. Institutions such as the WTO, IMF, and World Bank establish operational frameworks governing international economic relations. For example, WTO agreements regulate international trade relations among member states, while IMF regulations influence international monetary cooperation and financial stability. Institutional decisions, policy guidelines, and operational standards significantly shape international economic governance even when they are not formally classified as treaties. The increasing influence of international institutions demonstrates the institutionalized nature of modern International Economic Law. 5. THE SUBJECTS OF INTERNATIONAL ECONOMIC LAW (IEL) Introduction The subjects of International Economic Law (IEL) refer to the entities that possess rights, duties, powers, and responsibilities within the international economic system. These subjects participate in international economic relations and may create, enforce, or be affected by rules of International Economic Law. Traditionally, states were regarded as the only subjects of international law because they possessed full international legal personality. However, the development of globalization, international organizations,
foreign investment, and international trade has expanded the range of actors participating within the international economic order. Modern International Economic Law therefore recognizes several important subjects including states, international organizations, multinational corporations, individuals, and regional economic organizations. These actors interact within international trade, investment, finance, and development relations.
1. States States are the primary and most important subjects of International Economic Law. They possess full international legal personality, meaning they have the legal capacity to enter treaties, participate in international organizations, regulate economic activities, and enforce international obligations. States play a central role in creating international economic rules through: treaties; trade agreements; investment agreements; and participation in international institutions such as the WTO, IMF, and World Bank. States regulate: trade policies; taxation; foreign investment; monetary systems; and economic development strategies. They also possess sovereignty over natural resources and domestic economic affairs. However, states voluntarily limit aspects of their sovereignty when they join international economic agreements and organizations. The importance of states within International Economic Law was emphasized in Military and Paramilitary Activities in and against Nicaragua (Nicaragua v United States) ICJ Reports 1986, where the International Court of Justice affirmed the sovereign equality and independence of states in conducting their economic and political affairs.
