To supersede the permission in Sentence 3.3.1.9.(7), which would otherwise allow dead-end corridors up to a certain length, on the basis that additional safety measures are required in this type of occupancy.
This is to limit the probability that persons will become delayed or trapped in a dead-end portion of a corridor in an emergency situation, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.