Underground rooms
63.-(1) Νο work shall be carried on in any underground room (not being an underground room used only for storage purposes) which is certified by the Chief Inspector to be unsuitable for the purposes as regards construction, height, light or ventilation, or on any hygienic ground, or on the ground that adequate means of escape in case of fire are not provided.
(2) In this section the expression “underground room” means any room which, or any part of which, is so situate that half or more than half the whole height thereof, measured from the floor to the ceiling, is below the surface of the adjoining street or of the ground adjoining or nearest to the room.