Content:

1. ISCC Webinar – System Updates Summary Q1 2026

2. ISCC EU

3. ISCC PLUS

4. ISCC CORSIA

5. New Billing Information Section in the ISCC HUB

6. New APS Version 6.0 and Audit Procedures

The System Update is mandatory for all ISCC System Users, ISCC Auditors and cooperating Certification Bodies.

1. ISCC Webinar – System Updates Summary Q1 2026

Date: 20 April 2026, 14:00 – 15:00 (CEST, UTC +2)

We offer a regular webinar series to keep our System Users, ISCC Auditors and other stakeholders informed about all recent changes and developments.

2. ISCC EU

2.1 List of Material Eligible for ISCC EU Certification (“ISCC EU Material List”)

The ISCC EU material list has been updated. The newly added and revised materials are marked in bold.

2.2 New Audit Procedures for Installations Consuming RFNBOs

New audit procedures for the scope “Installations Consuming RFNBOs” are now available on the ISCC website (PDF version) and in the client section (Word version, login required) for interested System Users to get prepared for certification. The official launch and the provision of the scope in the ISCC HUB will follow in Q2 2026.

The scope “Installations Consuming RFNBOs” applies to installations that consume Renewable Fuels of Non-biological Origin (RFNBOs) as intermediates and want to count these volumes toward RED transport or industry quotas. Installations operating under this certification scope do not assign RFNBO sustainability characteristics to outgoing materials.

For further guidance, please contact us via the ISCC support centre.

2.3 Clarification on Co-processed Methanol and Biomethanol

The material name “Biomethanol” shall be used if 

• physically segregated biomaterial is processed, or 
• if mass-balanced biomethane via the gas grid is used in an SMR. 

When methanol is obtained from co-processing (e.g., end of life tyres), the wording “Co-processed oil to be used for replacement of methanol” shall be used. Mass balanced biomethane from the gas grid is not an eligible bio feedstock under co-processing.

2.4 Clarification on Soapstock Acid Oil Contaminated with Sulphur

This is to clarify that “Soapstock acid oil contaminated with sulphur” is considered a waste/residue raw material as per the UK RTFO feedstock list. Therefore, upstream certification is not required. 

However, it must be ensured that the material qualifies as a waste/residue, i.e., that:

• the process is not conducted with the intention to sell a more valuable product, and 
• there was no intentional contamination (e.g., by using more acid than necessary). 

Additionally, the contamination has to make the material unsuitable for other uses (e.g., animal feed). Please note that the acceptance of fuel derived from this feedstock depends on the acceptance of the national authorities where the final fuel is sold.

3. ISCC PLUS

3.1 New ISCC PLUS GHG Add-on Document

We have published the new ISCC PLUS GHG Add-on Document to explain the application of the voluntary GHG add-on under ISCC PLUS for the calculation and reporting of greenhouse gas (GHG) emission values along the supply chain. It sets out the methodology, rules, and guidelines for calculating and verifying GHG emissions and emission reduction. 

We recommend the application of this add-on for fuel products. The document outlines the GHG calculation methodologies for biofuels and Renewable Fuels of Non-biological Origin (RFNBOs). For any other products for which the GHG add-on has limited applicability, please refer to ISCC Carbon Footprint Certification (CFC).

Public Consultation

We welcome feedback from System Users, Certification Bodies and other interested stakeholders. The ISCC PLUS GHG Add-on Document (v1.0) is open to public consultation until 20 April 2026. Interested parties can download the document and submit their feedback on the ISCC website.

4. ISCC CORSIA

4.1 List of Material Eligible for ISCC CORSIA Certification (“ISCC CORSIA Material List”)

The ICAO CORSIA Positive List of materials classified as co-products, residues, wastes or by-products has been updated (Chapter 4.2, Table 1, ICAO CORSIA document “CORSIA Methodology for Calculating Actual Life Cycle Emissions Values”).

In addition, specifications for several raw materials have been introduced (see Sections 4.2.2, 4.2.3, 4.2.6, 4.2.7, 4.2.8, 4.2.9, 4.2.10, and 4.2.11 of the same document). New subcategories “Agricultural by-products”, “Forestry by-products”, and “Processing by-products” have been added, along with the allocation of existing feedstocks to these subcategories.

We have updated the corresponding provisions in the ISCC CORSIA Material List accordingly. The newly added and revised materials are marked in bold. New material entries with their specifications are now available in the ISCC HUB.

4.2 Keeping Data Updated in the ISCC HUB – ICAO CORSIA Reporting Obligation

In accordance with ICAO CORSIA requirements, every sustainability certification scheme, including ISCC CORSIA, is required to submit an annual report to the International Civil Aviation Organization (ICAO). This report must contain information on the certified products handled by each System User under ISCC CORSIA during the previous calendar year.

To fulfil this reporting obligation, we will collect the necessary data from all System Users that held ISCC CORSIA or ISCC CORSIA PLUS certification at any point in 2025. The information submitted must be accurate, complete, and provided within the specified deadline.

In preparation for this process, we remind all System Users to ensure that their contact details in the ISCC HUB are fully accurate and up to date. We will rely on these contact details provided in the ISCC HUB when reaching out to System Users for data collection.

5. New Billing Information Section in the ISCC HUB

We have added a new billing information section to the registration form in the ISCC HUB as part of our continuous efforts to improve data quality and simplify administrative processes. Previously, billing details were reflected in the Main Audit Report.

The billing information section includes the following mandatory fields:

• Billing Contact Person
• Billing Address

Once a registration has been approved, an “Update Billing Information” button will be displayed, allowing System Users to modify the details in this section without additional CB approval. Any saved changes will take effect immediately. For step-by-step instructions, please refer to section 5.1.5 of the ISCC HUB Manual for System Users.

To facilitate this change, the billing information section has been pre-filled with the billing information currently available for each registration. We kindly ask System Users to review and confirm the accuracy of their billing information in the HUB latest by their next audit, to ensure correct invoicing and continued compliance.

For new registrations, Certification Bodies are required to verify during the registration data check and adjustment that the billing information section has been completed correctly. After this initial verification, the maintenance and accuracy of the billing information is the responsibility of the System User. Confirmation of the validity of the billing details will be required as part of each certification audit.

6. New APS Version 6.0 and Audit Procedures

We are pleased to announce the release of a new version of the Audit Procedure System for ISCC Auditors and Certification Bodies (APS v6.0), which will be launched together with the updated audit procedures during the week of 23 – 27 February 2026.

APS 6.0 will become mandatory on 23 March 2026. 

Before this date, voluntary adoption is strongly encouraged to ensure a smooth transition to the new version. Audits starting after 23 March must be carried out in APS 6.0. Any audits starting after this deadline that are completed in APS 5.1 will not be accepted and must be recreated in APS 6.0.

Additional information on the update will be provided upon the release of APS 6.0.

For questions regarding the new APS update, please contact the APS Helpdesk at aps@iscc-system.org.