CORSIA allows aircraft operators to reduce its offsetting requirements through the use of CORSIA eligible fuels, which include CORSIA sustainable aviation fuels and CORSIA lower carbon aviation fuels.

Related Standards are defined in Annex 16, Volume IV sections listed below

2.2.4  Monitoring of CORSIA eligible fuels claims

2.3.3  Reporting of CORSIA eligible fuels

2.4.3  Verification of CORSIA eligible fuels 

3.3    Emissions reductions from the use of CORSIA eligible fuels

 

ICAO documents related to CORSIA eligible fuels

Annex 16, Volume IV include references to 5 ICAO documents that are essential to the implementation of the CORSIA. These ICAO documents are available below, and may only be amended by the ICAO Council.

Last Update: November/2025

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​CORSIA Eligibility Framework and Requirements for Sustainability Certification Schemes Fourth Edition,   June 2025	​CORSIA Approved Sustainability Certification Schemes* Third Edition,  October 2024	​CORSIA Sustainability Criteria for CORSIA Eligible Fuels** Fourth Edition,  June 2025	​CORSIA Default Life Cycle Emissions Values for CORSIA Eligible Fuels*** Eighth Edition,   November 2025	​CORSIA Methodology for Calculating Actual Life Cycle Emissions Values Seventh Edition,  November 2025

 *Sustainability Certification Schemes interested in being evaluated should follow the application process described here. 

Guidance materials and Supporting Documents

The "Guidance on the verification of CORSIA Eligible Fuel Claims"  supports verification bodies in  the  implementation  of  the  verification  requirements  contained  in  the  second  edition  of  Annex  16  Vol IV, more specifically on matters related to the verification of aeroplane operators’ claims of emissions reductions from the use of CORSIA eligible fuels (CEF).
**The "Guidance to Sustainability Certification Schemes (SCS) for application of CORSIA Sustainability Criteria, Themes 4 to 8, for CORSIA Sustainable Aviation Fuel produced on or after 1 January 2024" provides guidance to SCSs to support globally uniform application, including potentially applicable parameters.
***The CORSIA Supporting Document “CORSIA Eligible Fuels - Life Cycle Assessment Methodology” provides technical information and describes ICAO processes to manage and maintain the ICAO document “CORSIA Default Life Cycle Emissions Values for CORSIA Eligible Fuels”, including the process to add new default values to this ICAO document.  ​An Excel template is available for ICAO Member States, Observer Organizations, or approved SCS to request the calculation of a new default core life cycle emission value or a new default ILUC value.

FAQs

The CORSIA FAQs includes a section on CORSIA eligible fuels (see questions 4.11 to 4.21).

Sustainability Certification

CORSIA eligible fuels shall come from fuel producers that are certified by a Sustainability Certification Scheme (SCS) approved by the ICAO Council to perform this certification (more information on this approval process is available here).

Information on fuel batches and economic operators that are certified under CORSIA is provided on the CORSIA certified fuels website.

The following flowcharts illustrate the relation between the various entities involved with the sustainability certification of CORSIA Eligible Fuels (click to enlarge).
 

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Feedstocks

​Under the CORSIA framework, a feedstock is defined as "a type of unprocessed raw material used for the production of aviation fuel". 

Feedstocks for CORSIA eligible fuel production are broadly categorized into five categories:

• Primary and co-products are the main products of a production process. These products have significant economic value and elastic supply, (i.e., there is evidence that there is a causal link between feedstock prices and the quantity of feedstock being produced).
• By-products are secondary products with inelastic supply and economic value.
• Wastes are materials with inelastic supply and no economic value. A waste is any substance or object which the holder discards or intends or is required to discard. Raw materials or substances that have been intentionally modified or contaminated to meet this definition are not covered by this definition.
• Residues are secondary materials with inelastic supply and little economic value. 

Definitions (reference: Annex 16, Volume IV) 

CORSIA eligible fuel. A CORSIA sustainable aviation fuel or a CORSIA lower carbon aviation fuel, which an operator may use to reduce their offsetting requirements.

CORSIA lower carbon aviation fuel. A fossil-based aviation fuel that meets the CORSIA Sustainability Criteria under this Volume.

CORSIA sustainable  aviation  fuel. A renewable or waste-derived aviation fuel that meets the CORSIA Sustainability Criteria under this Volume. 

Latest updates 

• 19 November  2025 - ICAO Council approves the classification of new feedstocks and default core LCA values for CORSIA eligible fuels
• 27  June 2025 - ICAO Council approves CAEP/13 recommendations, including various amendments to ICAO documents related to CORSIA eligible fuels
   
• 28 October 2024 - ICAO Council approves amendments to three ICAO documents related to CORSIA eligible fuels, including a new CORSIA approved Sustainability Certification Scheme, and new CORSIA-approved feedstocks
   
• 11 March 2024 - ICAO Council approves amendments to three ICAO documents related to CORSIA eligible fuels
   
• 16 June 2023 - ICAO Council approves the expansion of the SCS approvals after the CORSIA pilot phase
   
• 14 June 2023 - First sustainable aviation fuel batches certified under CORSIA
   
• 28 November 2022 - ICAO Council approves CORSIA Sustainability Criteria for Lower Carbon Aviation Fuels.
   
• 12 November 2021 - ICAO Council approves CORSIA Sustainability Criteria for sustainable aviation fuels.
   
• 3 June 2022 - ICAO Council approves amendments to three ICAO documents related to CORSIA eligible fuels