The adequate implementation of an SMS by all RUs/IMs is a key element for success for the entire safety regulatory framework as foreseen by the Railway Safety Directive, since it forms the basis on which the National Safety Authorities (NSAs) issue safety certificates and safety authorisations. For the assessment of an SMS, NSAs can rely on the Regulations 1148/2010/EU2 and 1169/2010/EU3. Su…