xmlns:atom="http://www.w3.org/2005/Atom"
4.11. Every building must be designed and constructed in such a way that each liquefied petroleum gas storage installation, used solely to serve a combustion appliance providing space heating, water heating, or cooking facilities, will–
(a)be protected from fire spreading to any liquefied petroleum gas container; and
(b)not permit the contents of any such container to form explosive gas pockets in the vicinity of any container.