03.2026

Entity in Charge of Maintenance in European Union (EU) Railway Law

In the European Union’s railway system, safety responsibility does not end once a vehicle is authorised for use. EU law requires that every railway vehicle (as defined in in Article 3 [21] of the Directive [EU] 2016/798) operating on the EU railway network has one designated entity responsible for its technical condition throughout its service life. This entity is the Entity in Charge of Maintenance (ECM). Only one ECM may be assigned to a vehicle at any given time.

The concept follows a simple legal principle: maintenance responsibility is not shared between owners, railway undertaking, workshops or contractors. It is concentrated in one accountable organisation. That organisation must ensure continuous control over maintenance through a structured management system.

The obligation to assign an ECM to each railway vehicle was introduced in Article 14 of the Directive (EU) 2016/798 on railway safety. A vehicle cannot be used on the EU rail network unless an ECM has been designated and registered in the European Vehicle Register. Detailed organisational and certification requirements are defined in EU Commission Implementing Regulation (EU) 2019/779. This Regulation introduced a harmonised EU framework specifying tasks that ECMs must perform, internal structure, and certification assessment. There are no nationality requirements. Any entity can act as ECM for vehicles operating in the EU, provided it complies with harmonised rules and obtains required certification.

In legal terms, the ECM’s responsibility is continuous and organisational rather than operational in the narrow sense. The ECM does not need to perform maintenance itself, but it must manage, control and take responsibility for the entire maintenance chain. The core obligation is to ensure that vehicles remain safe for operation at all times. EU legislation requires the ECM system to cover four functions. These functions do not need to correspond to separate departments, but responsibilities must be clearly allocated.

Functional Structure

The Management Function (ECM-F1) provides overall governance of the maintenance system. It defines maintenance policy, allocates responsibilities and resources, and ensures monitoring and continuous improvement.

The Maintenance Development Function (ECM-F2) handles the technical basis of maintenance. It defines maintenance plans and inspection intervals, manages technical documentation and keeps maintenance files up to date.

The Fleet Maintenance Management Function (ECM-F3) ensures operational control of the fleet. It monitors vehicle status, tracks maintenance deadlines and confirms that vehicles return to service only after all requirements are fulfilled.

The Maintenance Delivery Function (ECM-F4) carries out the technical maintenance work or manages its execution. It covers workshops, equipment, supply chain and tools required for maintenance activities.

Together, these functions form a single responsibility chain connecting policy, engineering decisions, operational control and workshop execution.

In order to fulfil its obligations, the ECM must have a Maintenance Management System (MMS) in place. The MMS is the organisational and procedural framework explaining how maintenance is planned, controlled and monitored in practice. It is the central element assessed during certification and subsequent supervision. The MMS must demonstrate how maintenance risks are identified and managed. This typically includes planning procedures, configuration and documentation control, competence management, contractor selection and oversight, record keeping, internal audits and processes for handling defects, incidents and corrective measures.

Authorities examine whether decisions are documented, responsibilities are clear and operational evidence supports the declared system. Building and maintaining an MMS is therefore one of the most demanding aspects of acting as an ECM, as it requires technical, organisational and compliance processes to operate as an integrated single system.

Certification and Supervision

The ECM framework operates through a cooperation of certification bodies, national safety authorities, and European Union Agency for Railways (ERA). Accredited certification bodies are responsible for assessing applicants and issuing certificates. National safety authorities oversee the safe functioning of the railway system and may intervene where maintenance failures affect safety. ERA coordinates the framework, develops guidance and maintains the relevant European registers.

ECM certification is mandatory for entities responsible for freight wagon maintenance and is commonly required in practice for other rolling stock, particularly where vehicles are used commercially or operate across borders. Certificates specify the vehicle types and functions covered and are recognised across the EU. As a result, vehicles operating in several Member States can rely on a single certified ECM.

Overall, the ECM concept serves both safety and market integration objectives. From a safety perspective, it ensures that each vehicle has one clearly identified organisation responsible for its technical condition throughout its lifecycle. From a market perspective, it supports mutual trust between Member States and facilitates cross-border operations.

Grzegorz Kłodkowski

Attorney at Law (PL)