WTO Dispute Settlement: A Quarterly Review of Active Cases and Systemic Trends

More than six years after the Appellate Body of the World Trade Organization ceased to function as a quorum-bearing institution, the dispute settlement system it once anchored continues to operate in a peculiar half-life. Panels are still composed. Reports still issue. The Dispute Settlement Body still convenes on the fourth Monday of every month at the Centre William Rappard. But the architecture that members spent the better part of the Uruguay Round designing — binding two-tier adjudication of trade disputes by an apex body of seven jurists — no longer exists in operative form. What has emerged in its place is a fragmented, partially institutionalized arrangement that some call a workaround, others a quiet revolution, and a small but vocal minority a betrayal of the original bargain.

This quarterly review takes stock of where the system stands at the close of the first quarter of 2026. It surveys the most consequential panel reports of the past nine months, examines the maturing practice of the Multi-Party Interim Appeal Arbitration Arrangement (MPIA), and traces the policy fault lines — on subsidies, on environmental measures, on the fundamental treatment of state-led economies — that will shape both the substance of pending cases and the political terms of the reform conversation as members head toward MC14.

The Appellate Body Vacancy and the MPIA, Six Years On

Since December 10, 2019, the Appellate Body has lacked the minimum three sitting members required to staff a division. Successive administrations in Washington have continued to block the launch of selection procedures, citing concerns that began as discrete objections to specific Appellate Body decisions and have since broadened into a more systemic critique of judicial overreach in dispute settlement. The 184 written communications submitted under the General Council reform process do not, as of this writing, indicate that consensus on a path forward is imminent.

What was unthinkable in early 2020 has now become routine. A losing party at the panel stage, if it is not a participant in the MPIA, can lodge an appeal “into the void” under Article 16.4 of the Dispute Settlement Understanding. The notice of appeal goes to a Secretariat that has no division to assign it to; the report is technically not adopted; the matter sits in suspended legal animation. The losing party gains time and political cover; the winning party gains a panel report it can wave but not enforce. According to the WTO’s own dispute settlement statistics, twenty-three panel reports have been appealed into the void since the start of 2020, with the volume accelerating noticeably over the past eighteen months.

The MPIA, originally a stopgap negotiated in March 2020 by twenty-four members under the leadership of the European Union, Australia, Brazil, Canada, China, and others, has matured into the system’s most reliable adjudicative channel. Its membership has grown to fifty-seven, with the additions of Indonesia, Saudi Arabia, and the Republic of Korea since the MC13 outcome on dispute settlement reform was finalized in early 2024. MPIA arbitrations under Article 25 of the DSU produce binding awards between participants and have, in practice, replicated the procedural sequencing of an Appellate Body proceeding, including a ninety-day target from notice to award and a comparable scope of review limited to issues of law and legal interpretation in the panel report.

What the MPIA cannot do, of course, is bind those who decline to join it. The United States is not a participant, and a number of major economies — including India, several ASEAN members, and the GCC countries other than Saudi Arabia — have so far stayed out. A dispute between an MPIA member and a non-member therefore reverts to the void, with all the strategic implications that entails. Members have responded in different ways: the European Union has pursued bilateral arbitration agreements with several non-MPIA partners on a case-by-case basis, while Canada has elaborated a domestic policy of treating panel reports as authoritative for trade-remedy purposes regardless of appeal status.

Recent Panel Decisions of Systemic Significance

Steel and Aluminum: The Section 232 Aftermath

The cluster of disputes arising from the United States’ 2018 imposition of tariffs on steel and aluminum imports under Section 232 of the Trade Expansion Act of 1962 continues to generate panel work. The original quartet of reports issued in December 2022, finding that the measures were inconsistent with Articles I:1, II:1(a), and II:1(b) of the GATT 1994 and were not justified under the security exception of Article XXI(b)(iii), have been appealed into the void. They have nonetheless shaped subsequent compliance proceedings and a second wave of panels involving derivative products and country-specific arrangements concluded with Mexico, Canada, the European Union, and the United Kingdom.

The most recent panel report in this thread, issued in January 2026 in United States — Tariff Measures on Certain Aluminum Articles (DS622), addressed the question of whether quota-based country exemptions negotiated bilaterally during the 2021–2023 transition period themselves violated the most-favored-nation obligation of Article I:1. The panel concluded that the quota arrangements, as administered, conferred an advantage on the products of the favored exporters that was not extended immediately and unconditionally to like products from other Members. The report noted, in language that has drawn careful attention from trade lawyers, that the security exception cannot be invoked to insulate a system of bilateral preferences when the asserted security rationale — in this case, the maintenance of domestic capacity utilization above a defined threshold — is not present in the relevant relationship.

The implications extend well beyond aluminum. Panel reasoning in DS622 reinforces an emerging consensus, traceable through Russia — Traffic in Transit, the original Section 232 reports, and the recent panel ruling on the Russia-related export controls of certain Member States, that Article XXI is justiciable, that its terms are subject to good-faith review, and that asserted security interests must bear a sufficient nexus to the measure adopted. Members invoking national security as a basis for trade restrictions can expect that nexus to be examined with growing rigor.

Indonesia — Nickel Ore Export Restriction

Few cases have attracted the political attention of the European Union’s long-running challenge to Indonesia’s 2014 and 2020 export prohibitions on unprocessed nickel ore (DS592). The Indonesian measures, justified domestically as components of a downstream industrialization strategy aimed at moving the country up the battery and stainless steel value chains, were found by the panel in 2022 to be inconsistent with Article XI:1 of the GATT 1994 and not justified under any of Article XX’s specific exceptions, including the conservation provision in subparagraph (g).

Indonesia appealed the report into the void in December 2022. What has happened since constitutes a textbook study in the political economy of post-Appellate-Body compliance. Indonesian processing capacity has grown dramatically, with several new high-pressure acid leach facilities and rotary kiln-electric furnace plants commissioned by Chinese-backed investors. Brussels has imposed countervailing duties on certain stainless steel and nickel pig iron products, citing the export ban as a financial contribution that confers a benefit on downstream producers under Article 1.1 of the SCM Agreement. A second-track panel proceeding addressing those CVDs (DS636) is currently in the final stages of consultation, with a panel composition expected later this quarter. Indonesia continues to characterize the export restriction as a sovereign development tool consistent with the principles of Article XXXVI of GATT 1994 and with the broader fairness considerations in the Doha development agenda, despite the absence of any operative legal exception that would shelter the measure.

The substantive question lurking in DS636 is whether an export restriction that has been found WTO-inconsistent in a prior panel report can serve as the predicate for a SCM-Agreement subsidy finding when that prior report has not been adopted by the DSB. The European Commission’s position is that the SCM analysis is independent of the GATT analysis and turns on the existence of a financial contribution and benefit, not on the WTO consistency of the contributing measure. Indonesia counters that allowing such a doctrine creates a procedural shortcut around the void problem that punishes parties who exercise their appeal rights. The panel’s answer will be among the most consequential of the year.

China — Subsidies to Electric Vehicles and Battery Inputs

The European Union’s case against the People’s Republic of China challenging an array of provincial-level and central support programs for the electric vehicle sector (DS641) was referred to a panel in mid-2025. The case spans more than three dozen alleged measures, ranging from preferential land grants and concessional loans to consumption tax credits, Provincial Industrial Investment Funds, and the long-running New Energy Vehicle credit system. Procedurally it represents one of the largest single-case dockets the Secretariat has had to manage since the Boeing-Airbus disputes; substantively it places several long-deferred questions of subsidies law on the table at once.

Three doctrinal threads are in play. First, the public body question: under what conditions are state-owned enterprises and quasi-governmental investment vehicles “public bodies” within the meaning of Article 1.1(a)(1) of the SCM Agreement? The Appellate Body’s evolving jurisprudence on this point — from US — AD/CVD (China) through the various AD-CVD-China follow-up cases and the more recent panel work on Vietnamese steel — has been criticized as both too narrow (the “meaningful control” test) and inadequately tailored to economies in which the boundary between state and market is institutionally blurred. The DS641 panel will need to apply existing law to the largest set of state-adjacent entities yet examined.

Second, the question of pass-through: when input subsidies confer benefits on producers of upstream components — lithium iron phosphate cathode material, battery-grade graphite, separator film — that are then sold at arm’s length to vehicle manufacturers, can the benefit be traced through to the end product? The European Commission has presented sophisticated econometric evidence on input cost differentials and market share effects, drawing on data assembled for parallel European trade-remedy investigations. A finding of pass-through across vertically integrated supply chains would significantly expand the practical reach of subsidies discipline.

Third, specificity. The Chinese central government has long contested allegations that broadly available industrial policy programs — the Strategic Emerging Industries designation, the Advanced Manufacturing 2025 framework and its successors — are specific within the meaning of Article 2 of the SCM Agreement, on the grounds that they are available to a wide range of sectors and enterprises. The European challenge presses, with substantial documentary support, the alternative theory that “de facto” specificity is established by the disproportionate concentration of benefits in a small number of industrial categories.

The European Union — CBAM Implementation

The European Union’s Carbon Border Adjustment Mechanism, which entered its definitive period on January 1, 2026 after a transitional reporting phase, has prompted formal challenges from Russia, India, Türkiye, and South Africa. Two panels have been composed (DS628 and DS630); two more are in the consultation stage. The substantive questions are familiar to anyone who has followed the trade-and-environment literature for the past three decades, but their concentration in a single regulatory instrument applied to a defined basket of carbon-intensive goods has given them new operational salience.

The complainants’ principal claims invoke Articles I:1, III:2, and III:4 of the GATT 1994, as well as several provisions of the SCM Agreement. The Article III claims raise the like-products question in a form not addressed since the US — Shrimp implementation cases: are products with identical physical characteristics but different embedded carbon footprints “like” for purposes of national-treatment analysis? The European defense will rest in part on the argument that carbon intensity is a relevant competitive consideration that legitimately distinguishes products on the European market, and in part on Article XX’s general exceptions, particularly subparagraph (b) and the chapeau’s “no arbitrary or unjustifiable discrimination” requirement. Whether the panel will accept process-and-production-method-based distinctions as relevant to the threshold likeness analysis — or push them entirely into the Article XX justification — is the doctrinal question that will define the case.

The complainants have also raised free-rider concerns. The CBAM applies an effective carbon price at the border equal to the EU emissions trading scheme price net of any credible carbon price paid in the country of origin. India, in particular, has argued that the unilateral character of the EU’s benchmarking process — which assesses the carbon price paid abroad against a methodology defined in Brussels — conflicts with the principle of common-but-differentiated responsibilities developed under the UNFCCC framework, and that the WTO panel should give that broader treaty context interpretive weight under Article 31(3)(c) of the Vienna Convention on the Law of Treaties.

Anti-Dumping and Countervailing Duty Cases: Methodology Disputes

Beyond the headline cases, the docket of trade-remedy disputes has continued to expand. The 2025 calendar saw twenty-one new requests for consultations involving challenges to specific anti-dumping or countervailing duty investigations, the highest annual figure since 2018. Two recurring methodological themes deserve attention.

The first concerns the question of how investigating authorities should construct normal value when imports originate from economies in which prices and costs in the home market are deemed unreliable for benchmark purposes. The expiration of paragraph 15(a)(ii) of China’s Accession Protocol in December 2016 did not, despite Chinese arguments to that effect, eliminate the legal basis for using out-of-country surrogate methodologies; the Appellate Body in its final functional months, and the panels operating under the void since, have largely upheld the discretion of investigating authorities to construct normal value where they make a particularized determination that domestic prices and costs are distorted. The panel report in European Union — Anti-Dumping Measures on Certain Hot-Rolled Coiled Steel from China (DS617), circulated in October 2025, refined the analytical framework: investigating authorities must demonstrate the existence of a distortion in the relevant market, identify a causal link between the distortion and the price observed, and select a comparator country and data sources that bear a defensible relationship to the production circumstances of the exporter under investigation.

The second methodological theme concerns the treatment of cross-cumulation in countervailing duty investigations involving multiple exporting countries. The panel report in Türkiye — Countervailing Measures on Certain Iron and Steel Pipe (DS612), issued in June 2025, addressed the question of whether subsidies from third countries flowing through investment relationships can be cumulated with home-country subsidies for purposes of injury analysis. The panel’s answer, broadly negative on the specific facts, nonetheless left open the analytical possibility that transnational subsidy programs — an increasingly common feature of industrial policy in the lithium-iron-phosphate, polysilicon, and rare-earth sectors — may require a more integrated analytical treatment than the existing doctrinal framework readily provides.

Subsidies Cases Beyond Trade Remedies

Aircraft Subsidies: Resolution and Aftermath

The bilateral resolution of the United States and European Union’s long-running large civil aircraft disputes (DS316 and DS353) in June 2021 has held, with both sides extending the suspension of authorized retaliatory measures through 2030 under the cooperative framework agreed at the U.S.-EU Trade and Technology Council. The bilateral framework includes joint principles on civil aircraft financing, tax measures, and research-and-development support, and it has, by most assessments, succeeded in preventing the regulatory environment in either jurisdiction from drifting back toward the conduct that originally generated the disputes. The framework has not, however, prevented either side from voicing concern about the rapid emergence of subsidized civil aircraft programs in third countries; the development of the C919 narrow-body airliner and the more recent CR929 widebody collaboration between Russian and Chinese state-owned manufacturers has been the subject of preliminary fact-finding by both Brussels and Washington.

Agricultural Domestic Support: India’s Public Stockholding

The continuing impasse over a permanent solution to public stockholding programs for food security purposes remains one of the most politically intractable subjects in the dispute settlement docket. Under the Bali Ministerial Decision of December 2013 and the General Council Decision of November 2014, members agreed that public stockholding programs for food security purposes existing as of those dates would not be challenged, even if specific programs exceeded the de minimis levels permitted under Article 6.4 of the Agreement on Agriculture, pending the negotiation of a permanent solution. The peace clause has held in the sense that no formal challenge has been launched, but the United States, Australia, and Canada have continued to make pointed reservations regarding the operation of India’s minimum support price programs, particularly with respect to rice. India’s 2024 invocation of the peace clause for its rice procurement program at MSP levels above the de minimis threshold attracted sharp criticism but no formal challenge.

The Fisheries Subsidies Agreement: Implementation

The Fisheries Subsidies Agreement, agreed at MC12 in June 2022 and entering into force in September 2024 upon achievement of the two-thirds acceptance threshold, has begun to generate its first compliance questions. The Agreement disciplines subsidies contributing to illegal, unreported, and unregulated fishing; subsidies to fishing on overfished stocks; and subsidies to fishing on the unregulated high seas. A second-stage negotiation aimed at adding broader disciplines on overcapacity and overfishing has been ongoing in Geneva since 2023, with the Special Session of the Negotiating Group on Rules circulating its sixth consolidated text in February 2026. The implementation phase has surfaced a number of definitional questions — how to identify the “vessel” or “operator” receiving the subsidy when ownership runs through layers of corporate intermediaries, how to interpret the special and differential treatment provisions for low-income artisanal fishing — that will likely produce the Agreement’s first formal disputes within the next eighteen months.

The maturing practice under the Fisheries Subsidies Agreement is a useful reminder that the WTO’s rule-making capacity, while diminished, has not collapsed. Implementation will be a long process, and the first generation of disputes under the Agreement will set important interpretive precedents.

Trade and Environment: An Emerging Body of Practice

The CBAM cases discussed above are the most prominent of a broader cluster of disputes connecting trade rules to environmental regulation. The European Union’s deforestation regulation (EUDR), which took definitive effect in late 2025 after several deferrals, has been the subject of consultation requests from Brazil, Indonesia, and Malaysia (DS634, DS637, DS638). The methane fee on certain natural gas imports introduced by the United States under the Inflation Reduction Act follow-on legislation enacted in 2025 has prompted requests for consultations from Algeria and Qatar.

What is striking about this body of cases is the way they collectively press on the interpretive boundaries of Article XX. The conservation exception in subparagraph (g) was originally framed in terms that contemplated measures “relating to the conservation of exhaustible natural resources” and made “in conjunction with restrictions on domestic production or consumption.” In US — Shrimp and its compliance phases, the Appellate Body articulated a framework under which extraterritorial conservation measures could be sheltered by Article XX(g) provided that they were connected to a measure that disciplined domestic conduct in a comparable way and provided that they were applied in a manner consistent with the chapeau’s requirements of non-arbitrariness and non-discrimination. The CBAM, the EUDR, and the methane fee all push that framework in a direction it has not yet been tested in: they involve measures that respond to global commons concerns — greenhouse gas emissions, tropical deforestation, atmospheric methane — that have no clear territorial nexus to the regulating jurisdiction.

How the panels engage with these issues will signal whether the trade-and-environment doctrine, largely settled in its 1990s-era formulation, will be flexible enough to accommodate the climate transition’s regulatory ambition. There is no indication, in the panels’ preliminary procedural rulings, that they intend to depart sharply from the existing framework. But there are also clear signals that they understand the political stakes; written submissions in the CBAM disputes have routinely run to several hundred pages, and the parties have made unusually heavy use of expert reports on climate science, economic incidence analysis, and regulatory design.

Digital Trade and the E-Commerce Moratorium

The moratorium on customs duties on electronic transmissions, originally adopted at the 1998 Geneva Ministerial and renewed at every subsequent ministerial conference, was extended at MC13 through the next ministerial. The plurilateral Joint Statement Initiative on E-Commerce concluded substantive work in mid-2024 on a stabilized text covering electronic signatures, paperless trading, electronic contracts, consumer protection, source code disclosure, and data flows. Sixty-eight participants are signatories. The agreement is currently being incorporated into the WTO legal architecture as a plurilateral arrangement under Annex 4 of the Marrakesh Agreement, although that incorporation has run into the predictable consensus difficulties; India and South Africa have raised both procedural objections to the use of Annex 4 and substantive concerns about the constraint that source code disclosure provisions place on the regulatory autonomy of host states.

No formal disputes have yet been launched on digital trade questions, but the docket is unmistakably building. The recent Russian and Chinese measures on cross-border data transfers, several U.S. state-level laws on social-media content moderation, and a new generation of European Union data-localization requirements for sensitive sectoral data are all candidates for future challenge under existing GATS commitments and, eventually, under the e-commerce Joint Statement Initiative provisions when those are operative.

The MC13 Outcomes and the Forward Agenda

The Thirteenth Ministerial Conference, held in Abu Dhabi in February 2024, produced a more substantive outcome than many observers had expected. Members agreed on a framework decision on dispute settlement reform that, while not resolving the underlying impasse, defined a multi-track work program with specific deliverables on Appellate Body composition and tenure, scope of review, and the relationship between DSB practice and member-state policy space. The Ministerial Decision on Trade and Industrial Policy initiated a structured discussion in the Council on Trade in Goods that is, for the first time, examining the trade-distortive effects of contemporary industrial-policy instruments rather than treating them as off-limits political subjects.

The road to MC14, scheduled for early 2027 in Cameroon, is therefore unusually full. Negotiating bodies are working on the second phase of fisheries disciplines, on agricultural domestic support, on the e-commerce Joint Statement Initiative incorporation, and on dispute settlement reform. The Director-General has been actively shuttling among capitals, pressing the case that members have a narrow window to demonstrate that the institution’s rule-making and rule-enforcement functions can be made to work together at scale. Whether that case persuades enough members — including the United States — to make the political concessions required for an Appellate-Body restoration remains the central open question of the ministerial cycle.

Looking Ahead: Reform Prospects and Practical Implications for Members

For practitioners advising members of the WTO, the practical implications of the current state of the system are reasonably well-defined. First, members should expect that any panel report adverse to a politically sensitive measure will be appealed into the void unless the losing party is an MPIA participant. Strategic litigation planning should treat MPIA membership of the prospective respondent as a threshold consideration; where the respondent is not in the MPIA, the practical question becomes whether a panel report standing alone is worth the resource investment.

Second, members should prepare for an expanded role for non-DSU mechanisms of trade-rule enforcement. Bilateral arbitration agreements modeled on the MPIA, regional trade agreement dispute settlement procedures, and domestic trade-remedy administrative processes have all stepped into the space left by the Appellate-Body vacancy. The European Union’s revised enforcement regulation explicitly authorizes the Commission to take retaliatory measures based on a panel report alone, without waiting for adoption by the DSB, in cases where the responding party has appealed into the void. Other members may follow.

Third, members negotiating new regulatory measures — particularly in the climate, digital, and supply-chain due-diligence spaces — should expect heightened analytical scrutiny of WTO-consistency at the design phase. The CBAM cases, the EUDR consultations, and the supply-chain due-diligence implementing regulations under negotiation in several jurisdictions all illustrate the political and economic costs of regulatory designs that fail to anticipate the full range of WTO objections at the drafting stage.

The dispute settlement system has not been restored. Panels continue to do panels’ work, often with great care and considerable craft. The MPIA continues to provide a functional appeal channel for fifty-seven members. Cases continue to be filed; reports continue to issue; the underlying doctrinal evolution of WTO law continues. But the ambition of the original Uruguay Round bargain — a binding two-tier system applied uniformly across the membership — remains unrealized. The reform negotiations now under way will determine, over the medium term, whether that ambition is restored, redefined, or quietly abandoned.

For now, what we have is a system functioning at half capacity, generating doctrine that may or may not be consolidated by future practice, and producing, in the meantime, a great deal of important interpretive work that practitioners and policymakers ignore at their peril. The quarterly review will continue to track the docket as it develops.