The term “security” is currently used in the Railway Safety Act where the provisions are intended to deal with security. Despite there not being a definition of security, the terms are used where it is intended to deal with malicious actors or intent. For example, “security measures” or “security documents” are terms that are already included in the Railway Safety Act to distinguish provisions and definitions that are intended to deal with security.
On November 20th, 2023. See this statement in context.