Los Angeles County Municipal Code § 901.7 Systems out of service

Where a required fire protection system is out of service, the fire department and the fire code official shall be notified immediately and, where required by the fire code official, the building shall be either evacuated or an approved fire watch shall be provided for all occupants left unprotected by the shutdown until the fire protection system has been returned to service.

Where utilized, fire watches shall be provided with not less than one approved means for notification of the fire department and their only duty shall be to perform constant patrols of the protected premises and keep watch for fires. Also see Section 401.10 for fire watch responsibilities and procedures.

Exception: Facilities with an approved notification and impairment management program. The notification and impairment program for water-based fire protection systems shall comply with California NFPA 25.

Preplanned impairments shall be authorized by the impairment coordinator. Before authorization is given, a designated individual shall be responsible for verifying that all of the following procedures have been implemented:

. . .

When alteration requires modification of a portion of a fire protection system, the remainder of the system shall be kept in service.

When it is necessary to take a fire protection system, or portion thereof, out of service for repair, the repair shall be completed immediately and the system returned to full service.