When is it required for an engine service employee to have their certification card with them?

Having the certification card on hand while on duty as an Engineer is essential because it serves as a proof of the individual's qualifications and credentials to operate the train. Engineers need to demonstrate that they have completed the required training and assessments to ensure safety and compliance with operational protocols. This requirement helps maintain high safety standards within the railway system, ensuring that all personnel performing critical duties are properly certified.

While the other situations listed may involve interactions with trains or maintenance activities, the specific requirement to possess the certification card is firmly tied to being actively engaged in the duties of an Engineer. This emphasizes the responsibility engineers have in adhering to regulations and being accountable for safe operations.