What does a service tag and label signify according to administrative rule 9.02?

A service tag and label signifies the operational status of a system, as outlined in administrative rule 9.02. This designation is critical for identifying whether equipment is in working order, under maintenance, or non-operational. A white or yellow tag communicates to personnel at a glance the current state of the system, which is essential for safety and efficiency in operations. Recognizing the operational status helps prevent accidents and informs staff about the condition of systems they may interact with, ensuring appropriate actions can be taken.

The other choices, while they may represent various aspects of service operations, do not accurately capture the specific function of a service tag and label as defined. For example, a tag used for marking systems that are being upgraded, a document requiring signature, or a marker for systems pending inspection serve different purposes and do not pertain directly to indicating operational status.