To exempt buildings from the requirements of Sentence 9.10.18.4.(2), which would otherwise require heat or smoke detectors in certain spaces, if certain conditions are met [i.e. the building is sprinklered and the sprinkler system is electrically supervised and equipped with a water flow alarm].
This is to limit the probability that a fire will not be:
This is to limit the probability of delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.