(1)
A basement shall not be used for the storage, manufacture or handling of volatile solids, liquids or gases that generate explosive air-vapour mixtures or for processes that involve explosive dusts.
(2)
Entrances and exits to a basement and to rooms containing building services shall be separate from the remainder of the building in a building in which
(a)
the storage, manufacture or handling of volatile materials can generate explosive air-vapour mixtures, or
(b)
processes occur that produce explosive dusts.
(3)
Basements and rooms referred to in Sentence (2) shall be separated from the remainder of the building with a vapour-tight separation.