Process · ISCC CORSIA System and Guidance Documents

Sustainable Aviation Fuels Certification with ISCC

ISCC CORSIA System and Guidance Documents

CORSIA, the Carbon Offsetting and Reduction Scheme for International Aviation, is an emission mitigation instrument to address the increase in total CO2 emissions from aviation. It has been developed by the International Civil Aviation Organization (ICAO) and is the first Global Market Based Measures (MBM) scheme for an industry sector.

ICAO Member States have set ambitious targets to mitigate greenhouse gas emissions from air transportation, including carbon-neutral growth from 2020 (baseline: 2019 emissions) and a 50% reduction of net aviation carbon emissions by 2050. 104 states (including all EU Member States), representing around 80% of international aviation, participate in CORSIA. Hence, the majority of airlines will be affected by the emission mitigation scheme.

The Council of ICAO establishes and maintains international Standards and Recommended Practices (SARPs) that build a core aspect of ICAO’s mission and role and which are published in the form of Annexes. The first edition of Annex 16, Vol. IV, Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) has been adopted by the Council of ICAO on 27 June 2018 and became effective on 22 October 2018. Among other things, the Annex outlines CO2 offsetting requirements from international flights and the calculation of emissions reductions from the use of CORSIA eligible fuels.

ISCC offers two options for certifying CORSIA eligible fuels: ISCC CORSIA and ISCC CORSIA PLUS. The ISCC CORSIA System Documents displayed below go into detail on the certification guidelines and requirements under ISCC CORSIA and ISCC CORSIA PLUS.

If you have any questions regarding the ISCC CORSIA or CORSIA PLUS Certification Systems or need further information, please do not hesitate to contact the ISCC CORSIA team at info(at)

ISCC CORSIA System Document 102: Governance (v1.1, 16 September 2021)

The document lays down the general principles according to which the ISCC systems are governed globally. It specifies the goals and internal structure of ISCC, as well as the relationship between ISCC and its stakeholders.

ISCC CORSIA System Document 103: Requirements for Certification Bodies and Auditors (v1.1, 16 September 2021)

The document specifies the requirements for certification bodies to become recognised by ISCC and requirements and necessary qualifications of auditors conducting ISCC CORSIA audits.

ISCC CORSIA System Document 201: System Basics (v1.1, 16 September 2021)

Describing the ISCC CORSIA Certification System, the document outlines the certification criteria (sustainability requirements, traceability and life cycle emissions), relevant participants in the certification system and the registration and certification procedure.

ISCC CORSIA System Document 201-1: Waste, Residues, By-products (v1.1, 16 September 2021)

The document provides the principles for the certification of raw materials and feedstocks qualifying as waste, residues and by-products, their supply chains and specific certification requirements that may differ from crop-based biomass.

ISCC CORSIA System Document 202: Sustainability Requirements (v1.1, 16 September 2021)

The document explains the sustainability requirements that are valid for farms or plantations in the ISCC CORSIA System. The sustainability requirements are divided into six principles:

  • Principle 1: Protection of land with high biodiversity value or high carbon stock
  • Principle 2: Environmentally responsible production to protect soil, water and air
  • Principle 3: Safe working conditions
  • Principle 4: Compliance with human, labour and land rights
  • Principle 5: Compliance with laws and international treaties
  • Principle 6: Good management practices and continuous improvement

ISCC CORSIA System Document 203: Traceability and Chain of Custody (v1.1, 16 September 2021)

This document describes the requirements for traceability and chain of custody applicable to all elements of an ISCC CORSIA supply chain handling sustainable material.

ISCC CORSIA System Document 204: Audit Requirements and Risk Management (v1.1, 16 September 2021)

This document lays down how to conduct audits under ISCC CORSIA, including adjusting audit intensity in accordance with the risk management process.

ISCC CORSIA System Document 205: Life Cycle Emissions (v1.1, 16 September 2021)

The intention of the document “Life Cycle Emissions” is to provide the methodology, rules and guidelines for calculating, reporting and verifying emissions reductions. The methodology described here is based on the ICAO Document “CORSIA Methodology for Calculating Actual Life Cycle Emissions Values” (2019). It further lays down the basic requirements for low LUC risk certification under ISCC CORSIA.

ISCC CORSIA System Document 206: Group Certification (v1.1, 16 September 2021)

This document specifies requirements for the certification of groups, including the principles for sampling.

ISCC CORSIA Guidance Document: Low Land Use Change (LUC) Risk Certification (v1.1, 17 March 2022)

Building on the requirements for low LUC risk certification under CORSIA laid down in ISCC CORSIA System document 205 (please see above), this guidance document provides additional guidance on eligible low LUC risk practices, their verification as well as on the general low LUC risk certification process under ISCC CORSIA.