In October 2016, the ICAO’s 39th General Assembly adopted the target of achieving carbon-neutral growth from 2020 (CNG2020) onwards. To achieve this objective, it introduced a global market-based measure known as the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) for offsetting CO2 emissions above CNG2020.
Based on this decision, the ICAO Council adopted, in June 2018, the new Volume IV of the 16th Annex to the Chicago Convention, the directly related ICAO CORSIA Implementation Elements and the Environmental Technical Manual Volume IV DOC 9501, all with effect from October 2018. The principles set out by these standards are subject to regular review.
Since 1 January 2019, aircraft operators of all ICAO member states (including Switzerland) that emit over 10,000 tonnes of CO2 per year on international flights are required to record and report their CO2 emissions on the said international flights. From 1 January 2024, those emissions that exceed 85% of the 2019 emissions must be offset.