Investor-State Dispute Settlement (ISDS) has been a key mechanism for resolving disputes between foreign investors and host states for decades. It has played an essential role in protecting investor rights under international investment agreements (IIAs), such as bilateral investment treaties (BITs) and multilateral treaties, by offering an independent forum for investors to pursue claims against states for breaches of those agreements. Despite its initial success, ISDS has faced mounting criticism, particularly regarding transparency, consistency, fairness, and the broader implications for states’ regulatory sovereignty. In response, a wave of reforms and innovations is being considered and implemented to address these challenges, with a growing debate about the future trajectory of ISDS.
Background of ISDS
The ISDS system emerged in the mid-20th century to provide a neutral venue for investors to resolve disputes with host states, avoiding local courts which were often viewed as biased or ineffective. Initially, these mechanisms were part of BITs aimed at encouraging and protecting foreign direct investment (FDI) by providing investors with assurances that their investments would be treated fairly, and that they could seek recourse outside the host state’s legal system. ISDS is now embedded in thousands of investment treaties globally, contributing significantly to the expansion of global trade and investment.
However, the growth of ISDS has also led to concerns. States, civil society groups, and even some investors have argued that the system is overly favourable to investors, allowing them to challenge legitimate state regulations aimed at protecting public welfare, such as environmental laws or public health policies. The system has also been criticised for the high cost of arbitration, the opacity of proceedings, and inconsistent rulings by arbitral tribunals.
Criticisms of the Current ISDS Framework
One of the most common criticisms of ISDS is its lack of transparency. Many ISDS cases are conducted behind closed doors, with little information available to the public about the proceedings, the legal arguments, or the final award. This lack of transparency has fuelled concerns that the system is not accountable, particularly when public interests, such as environmental protection or human rights, are at stake. Though transparency reforms, such as the adoption of the UNCITRAL Transparency Rules in Treaty-based Investor-State Arbitration, have been implemented by some states, the majority of ISDS cases remain opaque.
Another significant issue is inconsistency in the decisions of arbitral tribunals. ISDS relies on a system of ad hoc arbitration, where each dispute is resolved by a panel of arbitrators selected for that specific case. While this allows for flexibility, it has also led to a lack of coherence in jurisprudence. Different tribunals may interpret the same treaty provisions in varying ways, leading to unpredictable outcomes. This inconsistency undermines the rule of law and investor confidence, as well as a state’s ability to predict the potential outcomes of disputes.
The cost and duration of ISDS proceedings also pose challenges. Arbitration is expensive, with legal fees and tribunal costs often reaching millions of dollars. For many developing countries, the cost of defending against investor claims can be prohibitive, potentially diverting resources from essential public services. Furthermore, the protracted nature of ISDS cases, which can drag on for years, exacerbates these costs and delays justice for both investors and states.
Additionally, ISDS has faced criticisms for its perceived bias in favour of investors. Since ISDS was designed to protect investors, it is seen as providing them with an unequal advantage over states. Investors can challenge state measures that they perceive to be discriminatory or expropriatory, but states have no equivalent mechanism to hold investors accountable for their actions. This one-sidedness has led to concerns that ISDS undermines the regulatory sovereignty of states, particularly when it comes to implementing policies for the public good.
Reforms to ISDS
In response to these concerns, a number of reforms have been proposed and, in some cases, implemented to address the shortcomings of the ISDS system. These reforms can be broadly categorised into procedural reforms, substantive reforms, and structural reforms.
Procedural Reforms
One of the most significant areas of reform is improving transparency in ISDS. The UNCITRAL Transparency Rules, adopted in 2014, are one of the most prominent efforts to increase the openness of investor-state arbitration. These rules require the publication of key documents related to the arbitration and allow for public access to hearings. While the Transparency Rules have been incorporated into some newer investment treaties, many existing treaties do not incorporate these provisions, meaning that transparency remains an issue in many ISDS cases.
To address inconsistency and unpredictability in ISDS decisions, some reforms have sought to establish mechanisms for the review or appeal of arbitral awards. Traditionally, ISDS awards are final and binding, with limited opportunities for appeal. This has led to concerns about the correctness of arbitral decisions and the lack of a unified body of investment law. In response, some states have proposed the creation of appellate mechanisms within ISDS, allowing for the review of awards to ensure consistency and correctness. The European Union (EU), for instance, has proposed a two-tier investment court system that includes an appellate tribunal.
Substantive Reforms
Substantive reforms have focused on clarifying the standards of protection afforded to investors under international investment treaties. Vague treaty provisions, such as “fair and equitable treatment” or “indirect expropriation,” have been interpreted inconsistently by tribunals, leading to unpredictability and concerns about state sovereignty. In response, many recent treaties have sought to clarify these provisions and set out more detailed criteria for what constitutes a breach of the treaty. This provides greater certainty for both investors and states, reducing the scope for arbitrary or inconsistent tribunal decisions.
Additionally, newer treaties are increasingly incorporating provisions that preserve a state’s right to regulate in the public interest. These provisions, sometimes referred to as “right to regulate” clauses, explicitly recognise that states have the authority to adopt measures aimed at protecting public welfare, such as environmental protection or public health, even if such measures negatively impact foreign investments. This marks a significant shift from older treaties, which were often interpreted as placing investor rights above the public interest.
Structural Reforms
One of the most ambitious and controversial reform proposals is the creation of a multilateral investment court (MIC) to replace the ad hoc ISDS system. This idea has been championed by the European Union, which argues that a permanent court with professional judges would address many of the problems associated with ISDS, such as inconsistency, lack of transparency, and bias. A multilateral court would provide a more coherent body of investment law and allow for appeals, addressing concerns about the finality of arbitral awards.
While the idea of an MIC has garnered support from some states and organisations, it also faces significant opposition. Critics argue that a permanent court would be costly to establish and maintain and that it may still be subject to the same criticisms as ISDS, such as bias in favour of investors. Moreover, the success of an MIC would depend on widespread international support, and it is unclear whether enough states would be willing to sign up to such a system, particularly given the complex renegotiation of existing treaties that would be required.
Innovations in ISDS
In addition to these reforms, several innovative approaches have been proposed to address the shortcomings of ISDS and create a more balanced and effective system for resolving investor-state disputes.
Alternative Dispute Resolution Mechanisms
One promising innovation is the increased use of alternative dispute resolution (ADR) mechanisms, such as mediation and conciliation, in investor-state disputes. These mechanisms offer a more flexible, less adversarial, and potentially less costly way of resolving disputes, compared to arbitration. Mediation, in particular, has been promoted as a way of fostering dialogue between investors and states, helping to prevent disputes from escalating into formal arbitration. The Singapore Convention on Mediation, which entered into force in 2020, provides a framework for the enforcement of mediated settlement agreements, making mediation a more viable option for resolving investor-state disputes.
Third-Party Funding and Its Regulation
Another area of innovation is the growing use of third-party funding in ISDS. Third-party funding allows investors to finance their claims through external funding, with the funder receiving a share of the award if the claim is successful. While third-party funding can help investors, particularly small and medium-sized enterprises (SMEs), to pursue legitimate claims that they may not otherwise be able to afford, it has also raised concerns about the potential for abuse. Critics argue that third-party funders may encourage frivolous claims or drive up the cost of arbitration. In response, there have been calls for greater regulation of third-party funding in ISDS, with some states and institutions introducing disclosure requirements for third-party funding arrangements.
Sustainability and Responsible Investment
As global attention increasingly shifts towards sustainability and responsible investment, there have been efforts to integrate these principles into the ISDS system. Some recent investment treaties include provisions that promote responsible business conduct, such as requiring investors to adhere to environmental, social, and governance (ESG) standards. These treaties may also include obligations for investors to engage in sustainable development and respect human rights. While these provisions are still relatively new, they represent an important shift towards aligning the ISDS system with broader global goals, such as the United Nations Sustainable Development Goals (SDGs).
Digitalisation and Technology in ISDS
Technology and digitalisation are also playing an increasingly important role in ISDS. The use of digital platforms for conducting arbitration hearings, submitting documents, and managing cases can help to reduce the cost and time associated with ISDS proceedings. During the COVID-19 pandemic, the shift towards virtual hearings became a necessity, and this trend is likely to continue as more arbitration institutions embrace technology to improve the efficiency and accessibility of the ISDS system.
The Future of ISDS: A Hybrid Approach?
Given the wide range of criticisms and the diversity of reform proposals, it is likely that the future of ISDS will involve a hybrid approach that incorporates elements of traditional ISDS, alongside newer mechanisms such as ADR, appellate mechanisms, and more structured court systems. The precise direction of reform will depend on the preferences of states and investors, as well as broader geopolitical and economic factors. Nonetheless, the key challenge for the future will be to create a system that balances the interests of investors with the need for states to regulate in the public interest.
At the same time, it is essential that any future system remains accessible to all investors, including smaller businesses, and that it promotes fairness, transparency, and consistency in decision-making. Whether this can be achieved through incremental reforms to the existing ISDS framework, or whether more radical innovations, such as a multilateral investment court, will be necessary, remains to be seen.
In conclusion, the future of investor-state dispute settlement is at a crossroads, with significant reforms and innovations underway to address the system’s shortcomings. While there is no one-size-fits-all solution, the evolving landscape of ISDS promises a more balanced, transparent, and efficient system for resolving disputes between investors and states. The challenge for policymakers will be to ensure that these reforms and innovations meet the needs of all stakeholders and that they contribute to a fairer and more sustainable global investment regime.