What document is required to notify a system's status when attaching a Red label?

The requirement for a written notification when attaching a Red label is crucial for ensuring that all parties involved are aware of the system's status. A Red label typically signifies that the fire alarm system is out of service or has a significant deficiency, posing potential risks. By providing a written notification, it creates a formal record that can be referenced by building owners, occupants, and responders.

This written document serves various purposes: it provides detailed information about the issues present in the system, outlines necessary steps for rectification, and ensures compliance with regulatory requirements. It is essential for maintaining clear communication, so that safety measures can be effectively coordinated until the system is restored to operational status.

While other options may seem plausible, they do not fulfill the legal and procedural requirements surrounding the notification of a system's status in cases of significant malfunctions or maintenance outages.