What the study found
The study finds that the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) may not be fully compatible with World Trade Organization (WTO) rules. The authors identify possible problems with exemptions for least-developed countries, sustainable aviation fuel (SAF) mandates, and unclear rules for carbon credit and certification standards.
Why the authors say this matters
The authors conclude that aligning CORSIA with WTO equity principles matters for keeping climate action and trade governance consistent. They also suggest that clearer and more coordinated rules could help avoid trade disputes while supporting aviation decarbonization.
What the researchers tested
The study used textual analysis of WTO agreements and CORSIA resolutions, along with conceptual interpretation of trade and climate rules and comparative case analysis. It also introduced a legal-policy interface framework and a Trade Restrictiveness Index (TRI) to assess compliance cost differences.
What worked and what didn't
According to the findings, CORSIA’s exemptions for least-developed countries and their credit eligibility criteria may violate WTO nondiscrimination principles. The authors also report that SAF mandates may breach the Technical Barriers to Trade and Subsidies and Countervailing Measures Agreements, while ambiguities in baseline adjustments and certification standards may encourage market fragmentation.
What to keep in mind
The abstract does not provide the full legal text analysis or detailed case outcomes, so the summary here is limited to the stated findings. The paper presents proposed reforms, but the abstract does not show whether those reforms were tested in practice.
Key points
- The study says CORSIA may conflict with WTO nondiscrimination rules.
- Exemptions for least-developed countries and credit eligibility criteria are flagged as possible legal problems.
- SAF mandates may breach WTO trade agreements on technical barriers and subsidies.
- Unclear baseline adjustments and certification standards may contribute to market fragmentation.
- The authors propose harmonized SAF standards, capacity-building, and transitional exemptions.
Disclosure
- Research title:
- CORSIA may conflict with WTO trade rules
- Authors:
- Zihan Chen
- Institutions:
- Tsinghua University
- Publication date:
- 2026-02-23
- OpenAlex record:
- View
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