You indicate the threshold for installation under 18.104.22.168 is not met. Therefore a fire alarm system is not required. If the presence of a sprinkler system did require a fire alarm system, it would be provided as a prescriptive requirement here.
In my opinion since a fire alarm system is not required any installation of such would be above the code requirements. However, if the architect did specify a fire alarm system be installed, the electrical supervision of the system via the fire alarm system would then be required per your reference of 22.214.171.124.(3).
S524 does not provide any information on what is required in a fire alarm system – those requirements are in the building code (eg. installation of pull station at principle entrance and near every required exit) . 524 provides how the system must be installed (eg. pull station mounting heights and distance from doors).
Hope this helps?