How long must a service label remain in place?

The correct answer indicates that a service label must remain in place for two years. This timeframe is crucial for maintaining compliance with regulations governing fire alarm systems. The service label typically provides essential information about the date of the last service, the technician's details, and any pertinent notes regarding the condition of the system. Keeping the label in place for two years helps ensure that the system is monitored adequately for maintenance and safety checks.

This two-year period aligns with the recommended practices for inspections and testing of fire alarm systems, allowing for proper documentation and record-keeping. It reflects an industry-standard approach to maintaining fire safety protocols, ensuring that users are always aware of when the last service occurred and when the next one should be scheduled to maintain operational integrity and safety compliance.