Which of the following is NOT a valid reason for an Engineer to display their certification card?

The choice regarding the display of an Engineer's certification card during a training session is not considered a valid reason. Typically, certification cards serve as verification of qualifications and training that have been completed, and they are required to be presented in scenarios where official validation is necessary, such as inspections or verifications by regulatory bodies like the Federal Railroad Administration (FRA) or railroad officials.

During a training session, the primary focus is educational, and while an Engineer may possess a certification card, the requirement to display it for validation of competence does not apply in this context. Training sessions facilitate skill development and safety practices rather than necessitate the enforcement of certification verification. This distinction is essential for understanding when the display of certification is required and when it is not mandated.