Eduardo Salgado Reyes | London
17th November 2025
ABSTRACT
This study critically analyses the impact of the international investment arbitration system, particularly the International Centre for Settlement of Investment Disputes (ICSID) and Bilateral Investment Treaties (BITs), upon state sovereignty and peoples’ self-determination. Through a systematic review of recent jurisprudential and economic literature (2018-2024), it examines how these mechanisms, originally designed to protect foreign investors against arbitrary expropriations, have evolved into instruments that significantly restrict the regulatory space of States, particularly in the Global South. The methodology employs doctrinal analysis, case study examination, and critical evaluation of reforms proposed by UNCITRAL and UNCTAD. The results demonstrate a structural asymmetry: whilst investors have obtained compensation exceeding USD 114 billion over the past two decades, States face regulatory restrictions that limit their capacity to implement public health, environmental protection, and sovereign economic development policies. The study concludes that the current system requires substantial reform towards a multilateral judicial model with appeal mechanisms, or a transition towards dispute resolution mechanisms that preserve the balance between investor protection and democratic sovereignty.
Keywords: Investment arbitration, ICSID, state sovereignty, self-determination, Bilateral Investment Treaties, regulatory space, regulatory chilling effect, ISDS.
1. INTRODUCTION
International investment arbitration represents one of the most significant and controversial developments in contemporary international economic law. Since its formalisation through the 1965 Convention on the Settlement of Investment Disputes between States and Nationals of Other States, which established the International Centre for Settlement of Investment Disputes (ICSID), this mechanism has experienced exponential expansion that its original creators scarcely anticipated (Schill, 2021).
The proliferation of Bilateral Investment Treaties (BITs) during the 1990s and 2000s, followed by the inclusion of investment chapters in Free Trade Agreements (FTAs), generated a network of over 3,000 international investment agreements incorporating investor-State dispute settlement (ISDS) mechanisms (UNCTAD, 2024). This legal architecture, constructed upon neoliberal premises of absolute capital protection, has generated systemic consequences that transcend the resolution of individual disputes to configure a form of global economic governance that limits state autonomy (Van Harten, 2007; Schneiderman, 2013).
The tension between investor protection and state sovereignty has sharpened dramatically in the twenty-first century. Cases such as Yukos v. Russia (with awards of USD 50 billion), ConocoPhillips v. Venezuela (USD 8.4 billion), and multiple claims against Spain regarding energy reforms (exceeding EUR 360 million in recent cases) illustrate how legitimate public policy decisions can result in unsustainable financial obligations for sovereign States (IISD, 2024; Wolters Kluwer, 2025).
This paper critically examines this fundamental contradiction: a system designed to “depoliticise” investment disputes has ended up deeply politicising public policy decisions, restricting States’ capacity to regulate for the benefit of their citizens and respond to democratic mandates. It argues that the ICSID/BIT system, in its current configuration, constitutes a form of transnational governance that privileges privatised property rights over collective rights and popular sovereignty, generating a structural democratic deficit.
The relevance of this analysis lies in the current historical moment: the climate crisis, global pandemics, and structural inequalities demand bold state interventions, whilst the investment arbitration regime imposes “chilling effects” that disincentivise progressive regulation (Tienhaara, 2011; ISDS Latin America, 2025).
2. THEORETICAL AND CONCEPTUAL FRAMEWORK
2.1 Economic Sovereignty and Self-Determination in International Law
Sovereignty, classically conceptualised by Jean Bodin and subsequently systematised in post-Westphalian international law, comprises the supreme authority of the State within its territory and independence from other States (Krasner, 1999). However, economic globalisation has generated what Stephen Krasner terms “organised sovereignty”: the voluntary limitation of state authority through international agreements.
Peoples’ self-determination, enshrined in the United Nations Charter (Art. 1.2) and the International Covenant on Economic, Social and Cultural Rights (Art. 1), includes the right to freely determine economic systems and develop natural resources (Daes, 2004). The Committee on Economic, Social and Cultural Rights has interpreted this right as implying state capacity to regulate foreign investment according to national development interests (General Comment No. 24, 2017).
2.2 Critical Theory of International Economic Law
The critical approach to international economic law (TWAIL—Third World Approaches to International Law) argues that the contemporary investment regime perpetuates colonial structures of resource extraction from the Global South to financial centres in the North (Anghie, 2005; Mutua, 2000). From this perspective, ICSID is not a neutral forum but an institution that codifies structural asymmetries of the world capitalist system.
The theory of “transnational economic constitutionalism” (Teubner, 2011) maintains that investment arbitration functions as an autonomous system of global governance, disconnected from national and international democratic processes. Arbitral tribunals act as “private legislators” interpreting ambiguous standards (such as “fair and equitable treatment”) to create de facto binding precedents (Schill, 2011).
2.3 The Concept of Regulatory Space
Regulatory space is defined as the scope of discretion that a State possesses to design and implement public policies without incurring international responsibility (Aisbett et al., 2018). BITs and ICSID restrict this space through:
- Indirect expropriation clauses: Which may characterise legitimate regulations (such as environmental or health policies) as compensable expropriations.
- Fair and Equitable Treatment (FET) clauses: Standards widely interpreted by tribunals to nullify regulatory decisions affecting investors’ “legitimate expectations.”
- Capital transfer clauses: Which limit the capacity to regulate speculative financial flows (UNCTAD, 2015).
3. LITERATURE REVIEW
3.1 Origins and Evolution of the System
The first modern BITs emerged in the 1950s, but it was during the “Washington Consensus” that they experienced massive proliferation. Vandevelde (2010) documents how these treaties evolved from instruments of diplomatic protection towards binding arbitration mechanisms, transferring jurisdictional sovereignty from national courts to international forums.
Waibel et al. (2010), in their influential empirical study, demonstrated that the system exhibits systematic biases: tribunals favour investors from developed countries and apply expansive interpretations of protection standards. This finding has been corroborated by subsequent UNCTAD (2024) studies showing that 81% of claims originate from investors in developed countries, whilst 62% of respondents are developing countries.
3.2 Critiques from Sovereignty and Democratic Law Perspectives
Van Harten (2007) argues that ISDS constitutes a form of “global private law” that grants transnational corporations special procedural rights non-existent for other actors. This asymmetry—where only investors may initiate arbitration—violates principles of procedural equality and judicial sovereignty.
Schneiderman (2013) examines how investment arbitration generates “regulatory chilling effects,” whereby States abandon or dilute environmental, labour, or health regulations for fear of multi-million-pound claims. His analysis of the Metalclad v. Mexico case demonstrates how the mere threat of arbitration can inhibit legitimate public policies.
Tienhaara (2011) extends this analysis to the environmental sphere, documenting cases where climate regulations were abandoned or modified under pressure from ISDS claims. The Vattenfall v. Germany case (2011), where a Swedish company sued over the post-Fukushima nuclear moratorium, exemplifies this tension.
3.3 Reforms and Proposed Alternatives
Recent literature has focused on reform proposals. UNCITRAL Working Group III has debated since 2017 the creation of a Multilateral Investment Court (MIC) with an appeal mechanism (UNCITRAL, 2023). However, critics such as Puig (2023) argue these reforms are insufficient if they do not address the structural asymmetry of the system.
Ecuador and Bolivia, led by adverse experiences (Ecuador faced over 30 claims), opted to withdraw from ICSID and terminate BITs (UNCTAD, 2024). South Africa developed domestic investment protection legislation requiring exhaustion of local remedies before international arbitration. These alternative models have been analysed by Berger (2015) and Aisbett et al. (2018) as pathways to recover regulatory sovereignty.
4. THE ICSID/BIT SYSTEM: STRUCTURE AND OPERATION
4.1 Legal Architecture of ICSID
ICSID, established in 1965 as a World Bank institution, operates under a Convention ratified by 158 States. Its structure includes:
- The Administrative Centre: Managed 1,401 known cases through 2024 (UNCTAD, 2024).
- Panels of Conciliators and Arbitrators: Designated by State parties, but selected ad hoc for each case.
- Annulment Committees: The only internal review mechanism, with limited powers (Arts. 52-53 of the ICSID Convention).
ICSID jurisdiction requires written consent from the State party, typically granted through compromissory clauses in BITs or investment legislation. Once granted, consent is irrevocable (Art. 25(1)).
4.2 Bilateral Investment Treaties: Problematic Content
Typical BITs include:
Definition of Investment Clauses: Broadly drafted to cover “all kinds of assets,” including future profit expectations and contractual rights (umbrella clauses).
Protection Standards:
- National and Most-Favoured-Nation Treatment: Prohibit formal discrimination.
- Fair and Equitable Treatment (FET): The most controversial standard, interpreted by tribunals to include investors’ “legitimate expectations,” regulatory stability, and transparent treatment.
- Full Protection and Security: Interpreted as an obligation to guarantee physical and legal security.
- Direct and Indirect Expropriation: Indirect expropriation allows characterising regulations as “tantamount to expropriation” if they radically affect investment value.
Dispute Settlement Mechanisms: Clauses permitting ICSID or UNCITRAL arbitration without requiring exhaustion of local remedies.
4.3 Arbitral Procedure and Systematic Critiques
The typical procedure involves:
- Notice of dispute (6-month “cooling off” period).
- Constitution of a three-member tribunal (one by each party, third by agreement or appointment by the ICSID Secretary-General).
- Written and oral procedure.
- Final award without possibility of substantive appeal.
Structural critiques identified in the literature:
Lack of Independence: Arbitrators are typically lawyers from private firms specialising in representing investors, generating structural conflicts of interest (Dezalay & Garth, 1996). The “small group” of recurrent arbitrators (fewer than 20 individuals have participated in the majority of cases) raises concerns about system co-optation.
Lack of Transparency: Until recent reforms (2014), proceedings were confidential. Even today, many cases remain partially sealed.
Exorbitant Costs: The average cost per party exceeds USD 5 million, excluding legal representation, making the system inaccessible to States with limited fiscal resources (IISD, 2024).
Jurisprudential Inconsistency: Different tribunals have interpreted identical clauses contradictorily, generating legal uncertainty (precedent fracture).
5. CONTRADICTORY IMPACT ON SOVEREIGNTY AND SELF-DETERMINATION
5.1 The Structural Contradiction: “Organised” versus Substantive Sovereignty
The ICSID/BIT system operates under a paradox: States voluntarily limit their sovereignty to attract investment, but this limitation becomes a structural restriction preventing the exercise of sovereignty in critical areas of public policy. As Sornarajah (2010) notes, this represents a “loss of regulatory sovereignty” not fully understood by BIT negotiators during the 1990s.
Sovereignty in contemporary international law cannot be understood merely as formal autonomy, but as effective capacity for self-governance (Krasner, 1999). From this perspective, the investment arbitration system erodes substantive sovereignty by:
- Displacing jurisdiction from national constitutional courts to international forums not integrated into democratic structures.
- Generating financial obligations that compromise national budgets, affecting capacity to implement social policies.
- Imposing “protection” standards that privilege contractual stability over democratic changes in public policy.
5.2 Regulatory Chilling Effects
The “chilling effect” constitutes the most insidious mechanism of sovereignty erosion. Unlike a condemnatory award, the chilling effect operates ex ante, disincentivising regulation before its adoption.
Documented cases:
- Talos Energy v. Mexico (2020-2024): The mere notification of intent to claim under USMCA Annex 14-D forced the Mexican government to negotiate and grant the company greater participation in Pemex oil projects, modifying sovereign energy policy (ISDS Latin America, 2025).
- Repsol/YPF v. Argentina: The threat of multiple claims (including ICSID and New York courts) over the 2012 YPF nationalisation resulted in a USD 5.3 billion settlement, subsequently exploited by vulture funds such as Burford Capital claiming an additional USD 16 billion (ISDS Latin America, 2025).
- Cortec Mining v. Kenya: When Kenya investigated mining licenses granted irregularly, British investors initiated ICSID arbitration for USD 394 million. Although Kenya prevailed (the tribunal determined the license was void for illegality), the case illustrates how the mere existence of the ISDS mechanism can protect investments obtained corruptly (IISD, 2024).
Tienhaara (2011) documents how this effect is particularly severe in environmental and climate policies. The possibility of claims for “indirect expropriation” has led States to abandon or dilute:
- Carbon taxes
- Mining moratoria
- Watershed protection regulations
- Emission reduction policies
5.3 Contradiction with Economic Self-Determination
The right to self-determination, recognised in international human rights law, includes peoples’ right to “freely determine their political status and freely pursue their economic, social and cultural development” (ICESCR, Art. 1.1). The ICSID/BIT system contradicts this fundamental right in three ways:
First: It privatises decision-making over strategic resources. When an arbitral tribunal determines that an energy or mining reform constitutes indirect expropriation, it substitutes national democratic will with three private arbitrators’ interpretation of what constitutes “legitimate regulation.”
Second: It imposes “compensations” that may equate to decades of social budgets. The Yukos case (USD 50 billion) represented more than 10% of Russian GDP at the time of the award. Venezuela faces ICSID claims exceeding USD 100 billion cumulatively, compromising its capacity to address humanitarian crises.
Third: It creates “structural blockages” to development. Typical BITs include “most-favoured-nation” clauses preventing industrial development policies favouring national companies, and capital transfer clauses limiting capacity to control speculative flows (UNCTAD, 2015).
5.4 Procedural Asymmetry and Structural Inequality
The system exhibits asymmetries that contradict principles of sovereign equality:
Unilaterality: Only investors may initiate arbitration. States cannot sue investors for human rights violations, environmental damage, or tax evasion before ICSID tribunals.
Forum shopping: Investors can structure investments through jurisdictions with more favourable investment treaties to maximise legal protection. For example, European investors in Latin America frequently structure investments through Dutch subsidiaries to invoke Dutch BITs with broader protection standards.
Enforcement: ICSID awards are immediately enforceable in 158 countries through simplified mechanisms (Art. 54 of the Convention), whilst judgments of national courts against investors require complex exequatur procedures.
Asymmetric costs and risks: The average defence cost for States is USD 4-8 million, plus potential awards of hundreds of millions. For investors, costs are frequently assumed by third-party litigation funders, who invest in speculative claims in exchange for percentages of awards (IISD, 2024).
5.5 Paradigmatic Cases of Sovereignty Erosion
Spain Case—Energy Reforms (2013-2024)
Spain faces 56 ICSID cases (the third highest number globally) over reforms to renewable energy subsidies implemented during the financial crisis. ICSID tribunals have issued pro-investor awards exceeding EUR 1 billion, arguing that the reforms violated Fair and Equitable Treatment by frustrating “legitimate expectations” of guaranteed profitability.
This jurisprudence establishes that States cannot modify subsidy regimes even during severe fiscal crises, drastically limiting budgetary sovereignty. Significantly, in 2024, US courts rejected Spanish arguments based on decisions of the Court of Justice of the EU (Achmea and Komstroy cases) invalidating intra-EU arbitration, applying the Foreign Sovereign Immunities Act to permit award enforcement (Wolters Kluwer, 2025).
Colombia Case—Rusoro Mining (2024)
The Colombian Supreme Court denied recognition to an award against Venezuela (Rusoro case), arguing sovereign immunity from execution. However, the Court’s methodologically deficient reasoning—which confused jurisdictional immunity with execution immunity—generates uncertainty regarding Colombia as an enforcement jurisdiction, illustrating how national judicial sovereignty clashes with the logic of international arbitration (Wolters Kluwer, 2025).
Zimbabwe Case—Border Timbers (2024)
The English High Court in Border Timbers v. Zimbabwe (2024) held that Article 54 of the ICSID Convention does not constitute a “clear and unequivocal submission” to English jurisdiction for sovereign immunity purposes, contradicting previous decisions (Infrastructure Services v. Spain, 2023). This jurisprudential divergence demonstrates the inherent legal insecurity of the system and States’ vulnerability to award enforcement.
6. ONGOING REFORMS AND LIMITATIONS
6.1 Multilateral Reform Processes
UNCITRAL, through its Working Group III, has debated since 2017 reforms to ISDS, including:
- Multilateral Investment Court (MIC): Proposal for a permanent judicial system with court of first instance and appeal tribunal.
- Code of Conduct for Arbitrators: To address conflicts of interest.
- Regulation of Third-Party Funding: Transparency regarding litigation financing.
However, these processes have been criticised for:
- Slowness: After 7 years, no consensus has been reached on the MIC.
- Exclusion of substantive issues: Access to justice asymmetry and elimination of standards such as FET are not discussed.
- Dominance by developed countries: The main claimants (USA, Germany, United Kingdom) resist reforms limiting access for their corporations.
6.2 Regional and National Reforms
European Union: Post-Achmea (2018), the EU has moved towards a system of “Permanent Tribunals” in recent agreements (CETA, proposed TTIP). However, this maintains inter-State arbitration, not eliminating the restriction on regulatory sovereignty.
ICSID Withdrawals: Bolivia (2007), Ecuador (2009), and Venezuela (2012) have denounced the Convention. Ecuador terminated 16 BITs between 2017-2024. These measures have been effective in reducing exposure to new claims, although “sunset” clauses (post-termination validity of 10-20 years) maintain residual risks.
Alternative Models: The Brazilian model of Cooperation and Investment Agreements (CFI) eliminates ISDS, focusing on dispute prevention and state mechanisms. India developed a 2016 Model BIT that restricts investment definition, excludes FET, and requires exhaustion of local remedies for 5 years.
6.3 Critical Evaluation of Reforms
The proposed reforms are insufficient to resolve the fundamental contradiction between investor protection and democratic sovereignty. The proposed MIC, although it would improve consistency and transparency, would maintain:
- The asymmetry of access (only investors sue).
- The possibility of “indirect expropriation” for legitimate regulation.
- Execution against essential sovereign assets.
As Puig (2023) argues, without reform balancing investor rights with obligations to respect human rights and the environment, the system will remain in a crisis of legitimacy.
7. DISCUSSION
The preceding analysis reveals an unsustainable structural contradiction. The ICSID/BIT system, conceived to “protect” investments in contexts of political risk, has evolved into a form of transnational global governance that:
- Delegitimises representative democracy: By subjecting public policy decisions to review by unelected tribunals, the system suggests that national democratic processes are inherently suspect of “arbitrariness” whilst private arbitral tribunals represent “neutrality.”
- Externalises costs of structural adjustment: Economic crises (such as Argentina 2001-2002 or post-2008 Spain) require distributive adjustments. The ISDS system transfers these costs to citizens (through social cuts to pay awards) whilst protecting investor profits.
- Incentivises speculative investment structures: Forum shopping and third-party funding generate a litigation industry that rewards speculative claims over real development investments.
- Contradicts international sustainable development commitments: Whilst the 2030 Agenda demands bold environmental and social regulation, ISDS imposes “chilling effects” that disincentivise exactly that regulation.
Sovereignty, in its contemporary dimension, cannot be reduced to formal autonomy but requires material capacity for self-determination. The ICSID/BIT system erodes both dimensions: it limits formal autonomy through irrevocable jurisdiction clauses, and reduces material capacity through awards compromising essential fiscal resources.
Peoples’ self-determination, particularly in the Global South, requires space for industrial policies, control of natural resources, and regulation of financial flows. The current investment regime criminalises precisely these developmentalist policies that were used by all today’s developed countries during their industrialisation stages (Chang, 2002).
8. CONCLUSIONS
This study has demonstrated that the international investment arbitration system, centred on ICSID and Bilateral Investment Treaties, generates negative and contradictory impacts on state sovereignty and peoples’ self-determination that cannot be resolved through cosmetic reforms.
Empirical evidence—1,401 known cases through 2024, awards exceeding USD 114 billion, and a growing trend of claims against climate and public health policies—confirms that the system has transcended its original purpose to become a mechanism of global economic governance that privileges property rights over collective human rights.
The structural contradictions identified are unsustainable in the twenty-first century context:
- The asymmetry of access to justice violates fundamental principles of sovereign equality and rule of law.
- Regulatory chilling effects compromise States’ capacity to respond to climate, health, and economic crises.
- The expansive interpretation of standards such as FET and indirect expropriation has created a “right to regulatory stability” non-existent in democratic constitutional law.
- Exorbitant costs and execution against sovereign assets generate a form of economic coercion that limits public policy options.
The reforms underway (MIC, Code of Conduct) are insufficient because they do not address the fundamental question: why should foreign investors have special procedural rights non-existent for national actors or victims of human rights violations by corporations?
Three transformation pathways are proposed:
First: Moratorium and Audit: States should suspend acceptance of new ISDS claims whilst conducting audits of their BITs’ impact, following the South African and Ecuadorian models.
Second: Systematic Termination: Evidence suggests that BITs do not increase foreign direct investment flows (Hallward-Driemeier, 2003; UNCTAD, 2018), but do generate significant fiscal and regulatory costs. Mass termination of BITs, with neutralisation of sunset clauses, is the most effective measure to recover sovereignty.
Third: Institutional Alternatives: Develop dispute resolution mechanisms in national courts with international due process standards, or strengthen regional jurisdictions (such as the Inter-American System or African Court) for investor-State disputes that include human rights and environmental counterweights.
Peoples’ self-determination in the twenty-first century requires the capacity to regulate the economy for the common good, not for private actors’ profit expectations. The ICSID/BIT system, in its current configuration, represents a structural obstacle to that fundamental democratic aspiration. Its substantial reform or elimination is not a political option but an imperative necessity of global justice.
REFERENCES
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GLOSSARY
Annulment: Internal review mechanism in ICSID (Art. 52 of the Convention) whereby an ad hoc Committee may annul an award for serious procedural defects (excess of powers, corruption, serious violation of procedural rule, failure to state reasons). Does not constitute appeal on the merits.
Bilateral Investment Treaty (BIT): International agreement between two States to promote and protect reciprocal investments, typically including ISDS.
Chilling Effect: Phenomenon whereby States avoid or dilute legitimate regulations for fear of investment claims.
Fair and Equitable Treatment (FET): Protection standard widely interpreted by tribunals to include regulatory stability, transparency, protection of legitimate expectations, and absence of arbitrariness.
Forum Shopping: Practice of structuring investments through jurisdictions with more favourable investment treaties to maximise legal protection.
Global South: Term referring to developing countries, particularly in Latin America, Africa, and Asia, often used in critical international law scholarship.
Indirect Expropriation: State measure that, without transferring formal title, radically affects the value or use of an investment, potentially generating compensation obligations.
Investor-State Dispute Settlement (ISDS): Mechanism allowing foreign investors to sue States directly before international tribunals for alleged treaty violations.
ICSID (International Centre for Settlement of Investment Disputes): World Bank institution established in 1965 to facilitate conciliation and arbitration of investment disputes between States and nationals of other States.
Legitimate Expectations: Doctrine developed in investment arbitration whereby investors may claim compensation if state actions frustrate expectations created by prior representations or regulatory stability.
Most-Favoured-Nation (MFN) Clause: Provision obliging a State to treat investors of the other State party no less favourably than investors of any third State.
Multilateral Investment Court (MIC): Proposed permanent judicial system to replace ad hoc arbitration, with appeal mechanism.
Regulatory Space: Scope of discretion that a State possesses to design and implement public policies without incurring international responsibility.
Regulatory Chill: See Chilling Effect.
Sovereign Immunity: Principle of international law protecting state assets from forced execution for debts, distinct from jurisdictional immunity.
Sunset Clause: Provision maintaining protection for existing investments for a period (typically 10-20 years) after treaty termination.
Third-Party Funding: Practice whereby entities external to the dispute finance arbitration costs in exchange for a percentage of the award.
Umbrella Clause: Provision elevating contractual obligations between an investor and a State to the level of international treaty.
Author’s Note:
This paper was prepared from SOLIDARIO GB, London, as a contribution to the debate on reform of the international investment system. The opinions expressed are the sole responsibility of the author.
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