To supersede the requirements of Sentence 9.9.9.1.(1), which would otherwise limit the travel distance to 1 storey to reach an exit or egress door, and permit a travel distance of more than 1 storey, if the floor level is served by a window meeting certain conditions that limit the probability that persons will be unable to egress from the floor level through the window 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.
To supersede the requirements of Sentences 9.9.8.2.(1) and (2), which would otherwise impose other travel distance or exit limitations.