What is the purpose of an impairment tag according to administrative rule 9.02?

The purpose of an impairment tag, as outlined in administrative rule 9.02, is to provide a clear and urgent visual indication that a system has been taken out of service. This red tag serves as a safety measure to alert personnel that a specific system is not functioning and should not be relied upon for operation. By utilizing a color like red, the tag helps ensure that everyone in the vicinity can easily recognize the situation and take appropriate precautions.

This designation is crucial in maintaining safety protocols, as it prevents individuals from inadvertently attempting to use or rely on an impaired system, which could lead to hazardous situations. The other options do not align with the specific role of an impairment tag; for instance, indicating that a system is operational would be contradictory to the impairment purpose, while temporary labels for testing or maintenance schedules do not convey the same level of urgency or caution needed for systems that are out of service.