CORSIA — the Carbon Offsetting and Reduction Scheme for International Aviation — is ICAO's global market-based measure for international flights. Rather than a voluntary label, it is an agreed UN-agency framework requiring airlines to offset growth in international aviation CO2 above a baseline, using CORSIA-eligible emissions units from approved programmes. The rules live in Annex 16, Volume IV to the Chicago Convention, with the list of eligible unit programmes updated annually by the ICAO Council. Monitoring, reporting and verification of airline emissions follow a defined MRV process routed through national authorities. For claims purposes, CORSIA matters in two ways: it determines which carbon credits an airline may use toward its obligations, and it shapes what "carbon-neutral growth" claims in aviation actually rest on. CORSIA compliance is an offsetting mechanism, not a measure of absolute emissions reduction; holding eligible units supports a compliance claim only within the scheme's rules and periods — it does not by itself substantiate broader climate-neutrality wording.
Conditional relationships
Claims it may support
A relationship does not mean that the standard proves or validates every use of a claim.