To supersede the application of Sentence 3.1.8.1.(2), which permits openings in fire separations, even if protected by closures, and not permit any openings in fire separations between a care, treatment or detention occupancy and a repair garage.
This is to limit the probability that carbon monoxide, exhaust fumes or other toxic vapours will migrate from the repair garage into the care, treatment or detention occupancy, which could lead to the accumulation of such vapours to levels that could pose a risk to human health from short-term exposure, which could lead to harm to persons.