An employer shall cause every flammable liquid store to be -
(a) separated by means of fire-resisting material with a fire resistance of two hours from any room, cabinet or enclosure, contemplated in subregulation (2);
(b) constructed of fire-resisting material with a fire-resistance of two hours;
(c) constructed in such a way that, in case of spillage, a volume of the flammable liquid in question equal to the quantity of flammable liquid ordinarily kept in store plus 10 per cent of that quantity, can be contained;
(d) ventilated to the open air in such a manner that vapour cannot accumulate inside the store; and
(e) clearly marked with a sign indicating that it is such a store and also indicating the amount of flammable liquid which may be stored therein.