ICAO has joined the Supporting Alliance for CORSIA EEU Supply, strengthening efforts to increase the availability of eligible emissions units ahead of the aviation sector’s 2027 compliance deadline. IATA announced the move at its World Sustainability Symposium in Brussels, where the alliance reported that 72 million units were covered by CORSIA-compatible authorisations as of August, well below the 200–250 million estimated requirement for the initial cycle.
The alliance brings together more than 80 stakeholders to tackle supply bottlenecks, including the processes countries use to authorise emissions units for CORSIA while preventing double counting against national climate commitments under the Paris Agreement. Its work also includes technical assistance for participation in carbon markets and implementation of Article 6.2.
The 72 million units covered by 42 Letters of Authorisation represented an increase from 40 million at the start of 2026. However, the available volume remains 128–178 million units short of the estimated requirement, based on the August figure.
ICAO Deputy Director of Environment Tetsuya Tanaka said the organisation’s participation would strengthen cooperation among governments, airlines and carbon-market stakeholders and support implementation of CORSIA. The scheme’s first compliance cycle covers 2024–2026, with airlines expected to meet related obligations from 2027.