(3)A carbide storage shed may also form a part of, or attached to an Acetylene plant provided that it is separated from other portions of the plant by substantial partition and the entire building including the carbide storage shed, observes a safety distance of 15 metres from any other premises:Provided that the Chief Controller may allow the storage shed at a distance of less than 15 metres in the case of Acetylene plants which have been under operation before these rules have come into force and under such conditions as he may specify.
