To exempt one of the means of egress serving mezzanines from the application of Sentence 9.9.8.6.(1), which would otherwise require exits on the same basis as required for floor areas, and permit one of the means of egress to lead through the room in which the mezzanine is located if certain conditions are met.
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.