To supersede the requirements of Sentence 3.2.5.16.(1) and permit different locations for, and the securing of, portable extinguishers, if certain conditions are met. These conditions are to limit the probability of delays in accessing portable extinguishers in a fire situation, which could lead to the fire not being suppressed or controlled, which could lead to the spread of fire to other parts of the building, which could lead to damage to the building.