An entity in charge of maintenance (ECM) is defined in the Railways and Other Guided Transport Systems (Safety) Regulations 2006 (as amended) (ROGS). The Office of Rail and Road (ORR) guide to ROGS describes an ECM as ‘any person or organisation that is responsible for the safe maintenance of a vehicle and is registered as an ECM in the national vehicle register. This can include people or organisations such as [railway] undertakings, infrastructure managers, a keeper or a maintenance organisation.’