Technical Correction to EU Railway Interoperability Directive: What Companies and Operators Must Review in 2026

Key data

If your company operates in the European railway sector—whether as an operator, rolling stock manufacturer or infrastructure manager—the correction published on 21 July 2026 regarding Directive (EU) 2016/797 requires an immediate review of your compliance procedures. This is not a new directive: these are corrections of material errors in the current text, which means that the legal framework you already apply may have changed in specific aspects without you knowing it yet.

Directive 2016/797 is the reference standard for railway interoperability in the EU. It establishes the essential requirements that railway subsystems and interoperability components must meet, as well as the conformity assessment procedures that manufacturers and operators must follow. A correction of material errors in this text may alter definitions, technical requirements or assessment procedures that are already integrated into your internal processes.

What does this regulation establish?

This publication does not introduce new obligations from scratch: it rectifies material errors detected in the original text of Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the railway system in the European Union (recast), originally published in Official Journal L 138 of 26 May 2016.

The corrections may affect any of these elements of the directive:

• Essential requirements that must be met by the structural and functional subsystems of the railway system.
• Technical Specifications for Interoperability (TSI): technical documents that specify how essential requirements are met in each subsystem.
• Definitions of key concepts used in the directive and in derived procedures.
• Conformity assessment procedures applicable to manufacturers and notified bodies.

Since this is a correction of material errors, the corrected text prevails over the original from its publication. Any technical documentation, declaration of conformity or internal procedure based on the previous text must be reviewed in light of the corrections.

Economic and operational impact

The impact of this correction is primarily technical and administrative, as indicated by the publication itself. No new fees, penalties or specific adaptation deadlines are established in the published text. However, the operational implications for affected companies may be significant:

• Review of technical documentation: Declarations of conformity, technical files and maintenance manuals may require updating if the corrections affect the requirements or definitions that support them.
• Coordination with notified bodies: If conformity assessment procedures have changed, it may be necessary to review agreements with notified bodies (NoBo) that certify the subsystems.
• Risk of non-compliance: Operating with documentation based on the previous text—if it contained material errors that have now been corrected—may expose the company to observations in audits or inspections by the European Union Agency for Railways (ERA).
• Cost of adaptation: No figures have been published, but internal review and coordination with external bodies represent a management cost that each company must assess based on the number of affected subsystems and certifications.

Who does it affect?

• Railway companies: Operators of passenger and freight railway transport services in the EU that must comply with interoperability requirements to access the network.
• Railway material manufacturers: Companies that design, manufacture or market rolling stock, interoperability components or railway subsystems subject to conformity assessment.
• Infrastructure managers: Entities responsible for the management and maintenance of railway infrastructure (tracks, signalling, fixed installations) that must ensure the interoperability of their assets.
• Notified bodies (NoBo): Entities accredited to assess the conformity of subsystems and components with the requirements of the directive.
• Maintenance entities and railway workshops: To the extent that their procedures are linked to the technical requirements of the directive.

Practical example

A rolling stock manufacturer that has recently obtained authorization to put into service a new type of train under Directive 2016/797 should act as follows in response to this correction:

1. Access the corrected text published on 21 July 2026 in the Official Journal of the EU and identify which articles or annexes have been modified.
2. Compare the corrected requirements or definitions with those that served as the basis for its technical file and declaration of conformity.
3. If any correction affects the foundations of its certification, contact its notified body to assess whether a review or update of the file is necessary.
4. Document internally the analysis carried out, even if the conclusion is that the corrections do not affect its products, as evidence of due diligence in the event of possible inspections.

This process is equally applicable to an infrastructure manager that has network renewal or expansion projects underway with technical documentation based on the previous text of the directive.

What should companies do now?

1. Download and read the corrected text: Access the official publication on EUR-Lex (OJ:L_202690607) and identify exactly which articles, annexes or definitions have been modified.
2. Compare with current internal documentation: Review whether your declarations of conformity, technical files, maintenance procedures or contracts with notified bodies refer to the corrected elements.
3. Involve the technical and legal department: This review must be joint between the engineering team (which knows the technical requirements applied) and the legal or regulatory compliance team.
4. Contact the notified body if applicable: If the corrections affect the basis of a current certification, consult with your NoBo to determine whether it is necessary to update the file or issue a new declaration.
5. Document the impact analysis: Regardless of the outcome, keep a written record of the analysis carried out. This is essential as evidence of due diligence before the ERA or national railway safety authorities.
6. Update internal procedures: If the corrections affect operational or maintenance processes, update internal documents and train affected personnel.

Official source

Consult full regulation at official source

Disclaimer: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://eur-lex.europa.eu/./legal-content/AUTO/?uri=OJ:L_202690607