Under its scope of eligibility, ICAO has excluded the following activity and/or unit types, methodologies, programme elements, and/or procedural classes as ineligible for use under Phase One of CORSIA:
- Planned Emission Reductions (PERs).
- Units issued to microscale activities where an accredited entity has not carried out validation and verification.
- VERs issued to all activities that are developed in REDD+ (Reducing emissions from deforestation and forest degradation in developing countries) countries and utilise methodologies in the programme’s Land Use and Forestry & Agriculture categories and are estimated to generate greater than 7,000 Verified Emissions Reductions (VERs) / annum individually or grouped, with the allowable exception of activities that utilise methodologies in Gold Standard’s Soil Organic Carbon, Agriculture, and Livestock categories.
- VERs issued to activities involving grid-connected renewable electricity generation/supply that are estimated to have a maximum output capacity greater than 15 megawatt-hours of electricity, individually or grouped.
- VERs issued to all activities that utilize methodologies in the programme’s Engineered Removals category.
Engineered Removals Exclusion:
CORSIA’s Technical Advisory Body (TAB) excluded novel Carbon Dioxide Removal (CDR) methods—such as biochar, direct air capture (DAC), and enhanced weathering—from the current eligibility list. TAB highlighted that engineered CDR methods are relatively new and may lack established international best practices and mature, standardized methodologies.
The TAB plans to reassess novel CDR methodologies during its 2025 assessment cycle. This evaluation will consider ongoing developments, including advancements in IPCC guidelines and Article 6 of the Paris Agreement.
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