To supersede the prohibition on the use of fire escapes stated in Sentence 3.4.7.1.(1) on the basis that their use is limited to buildings under a certain height [number of storeys], if certain conditions are met [fire escapes conform to Articles 3.4.7.2. to 3.4.7.7.].
This is to limit the probability that the inadequate design of fire escapes will lead to:
To state the application of Articles 3.4.7.2. to 3.4.7.7.