WTO members signed the Marrakesh Agreement establishing the World Trade Organization and its annexes, including Annex 2: the Dispute Settlement Understanding (DSU). The DSU was designed to replace the looser GATT-era practice with clearer steps, deadlines, and a stronger way to adopt rulings.
The WTO and the DSU took effect, creating a single forum for enforcing many WTO agreements through one process. A key change was that panel and Appellate Body reports are adopted unless all WTO members agree to reject them, making it harder for a losing party to block an outcome.
Venezuela requested consultations against US gasoline rules, an early test of the new DSU process. The case focused on whether US regulations discriminated against imported gasoline compared with domestic gasoline under GATT non-discrimination rules.
The WTO established the Appellate Body under DSU Article 17 as a standing body to review legal issues from panel reports. This created a two-stage system—panel then appeal—intended to make rulings more consistent and predictable across cases.
The Dispute Settlement Body adopted the Appellate Body and panel reports in US—Gasoline. This became a foundational decision on how WTO exceptions (such as GATT Article XX) are interpreted, while confirming that non-discrimination rules still apply to environmental measures.
The DSB adopted Appellate Body and panel reports finding parts of the European Communities’ banana import regime inconsistent with WTO obligations. The dispute became a major example of how WTO rulings can affect politically sensitive trade policies and long-running compliance negotiations.
The DSB adopted reports in the hormones dispute over the EU ban on beef from cattle treated with certain growth hormones. The case became a landmark for the SPS Agreement (Sanitary and Phytosanitary Measures), especially the requirement that certain health restrictions be supported by a risk assessment.
The Appellate Body issued its report in US—Shrimp, a key dispute about import restrictions linked to sea turtle protection. The decision is widely cited for explaining that environmental goals can fit within WTO exceptions, but measures must be applied fairly and without unjustified discrimination among trading partners.
The DSB adopted reports in the dispute over the US Foreign Sales Corporation (FSC) tax rules. The case became a high-profile example of WTO scrutiny of tax measures as export subsidies under the Subsidies and Countervailing Measures (SCM) Agreement.
The DSB adopted the panel report in the dispute over Section 110(5) of the US Copyright Act, brought under the TRIPS Agreement (intellectual property rules). The case illustrated that WTO dispute settlement also covers services and IP-related obligations, not only tariffs and goods trade.
The DSB adopted reports finding US steel safeguard measures inconsistent with WTO safeguards rules. The United States terminated the safeguards shortly before adoption, showing how adverse rulings—combined with the risk of authorized retaliation—can quickly change national trade policy.
The DSB adopted Appellate Body and panel reports finding several US cotton support measures inconsistent with WTO agriculture and subsidy rules. This dispute became a landmark for how the WTO evaluates domestic support and export-related programs, and it influenced later negotiations and policy adjustments.
The DSB adopted the panel and Appellate Body reports in the Boeing subsidy dispute (DS353). Together with related Airbus litigation, this marked a long, technically complex period in WTO dispute settlement focused on industrial subsidies and their effects on competition in high-value sectors.
The Appellate Body fell below the minimum of three members needed to hear new appeals, after terms of two members expired. This created an “appeal into the void” problem: parties could appeal a panel report, but the appeal could not be completed, weakening the DSU’s ability to deliver final, enforceable rulings.
WTO Dispute Settlement System: Formation and Landmark Cases (1995–2019)