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Technical Advisory Body (TAB)

2025 Assessment cycle


Call for Applications: Re-assessment process


*New*

From 3 February to 3 March 2025, ICAO invites emissions unit programmes  already eligible for the first phase to apply to 2025 re-assessment by the Technical Advisory Body (TAB), which will make recommendations on their eligibility to supply CORSIA-Eligible Emissions Units for the 2027-2029 compliance period (part of the CORSIA 'second phase'). Any interested programme should provide the updated information requested through the Re-application form and its Appendices, as well as supplementary materials and evidence as applicable.


The programmes are requested to use the forms listed below:


The re-assessment will be conducted during TAB's 2025 assessment cycle, according to the TAB Terms of Reference, TAB Procedures and 2025 Work Programme.

 

Note: As per the TAB Procedures, TAB will no longer consider new applications for programme eligibility for the 2024-2026 compliance period ('first phase'), having completed two full assessment cycles for that period. In early 2026, TAB will launch a first call for new applications for eligibility for the 2027- 2029 compliance period. Successful applicants in the 2026 assessment cycle may also be recommended to supply eligible emissions units for the 2024-2026 compliance period. 


Submission of Material Changes 


TAB will continue to assess material changes on a rolling basis in 2025, with two annual deadlines. Therefore, ICAO invites emissions unit programmes already eligible or conditionally eligible to submit material changes for TAB assessment by the following deadlines:  March 3, 2025, and August 1st, 2025.


Summary Table


The summary table on CORSIA Eligible Emissions Units presents in a consolidated manner the list of programmes fully or conditionally approved by the ICAO Council to supply units to the Pilot Phase (2021-2023 compliance period) and First Phase (2024-206 compliance period). The table is for information purposes only and is available here.



2025 Webinar for Emissions Unit Programmes

Understanding CORSIA Eligible Emissions Units


On February 11, 2025, ICAO organized a webinar to inform stakeholders about the 2025 re-assessment process, key documents for understanding the CORSIA Eligible Emissions Units, recent developments and next steps in the work of the Technical Advisory Body. 




Material Change Form


Programmes which are approved to supply CORSIA Eligible Emissions Units are encouraged to use the Material Change Form to inform TAB of any material changes, the procedures for which are described in Section 8 of the TAB Procedures.


Clarification of TAB's criteria interpretation


The document "Clarification of TAB's criteria interpretation contained in TAB Reports" consolidates TAB’s further interpretations of the CORSIA Emissions Units Eligibility Criteria and associated Guidelines for Criteria Interpretation, including specific approaches taken to apply criteria and guidelines during the TAB’s assessments, which form the basis of TAB’s recommendations to the ICAO Council on eligible emissions units. The latest version of this document is available here.


Market Monitoring Form


The public is invited to submit comments pertaining to observations of any potential deviation from the Emissions Units Criteria (EUC), CORSIA Eligible Emissions Unit Programme's Scope of Eligibility (as specified in the ICAO document "CORSIA Eligible Emissions Units"), and/or Terms of Eligibility on an on-going basis using this Market monitoring form.


Previous TAB Assessments


TAB completed yearly assessments since 2020. Detailed information about those assessments can be accessed below:

2019 TAB Assessment

2020 TAB Assessment

2021 TAB Assessment

2022 TAB Assessment

2023 TAB Assessment

2024 TAB Assessment


Technical Advisory Body (TAB)

TAB Terms of Reference

TAB Procedures
List of TAB M​embers

TAB 2025 Work Programme


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