All cinemas shall be provided with such number of hydrants, not less than two as may be fixed by the l icensing authority. The hydrants shall be of a diameter not less than 2 1/2 inches and shall be fixed at such si tes as may be approved by the appropriate Executive Engineer. The hydrant s shall be connected to the cisterns provided for in Rule 73 by taking separate mains of 3" diameter from each cistern and joined together by a single main of 3" diameter
Provided that in the case of premises where no cisterns are required to be kept under Rule 73 the hydrants shall be connected to the municipal water mains. Hose pipes with jet nozzles and required accessories shall also be provided as directed by the appropriate Execut ive Engineer
Provided further that nothing in this rule apply to premise s duly l icensed for use for cinematograph exhibit ion before the coming into force of these rules if such premises are si tuated in places where the municipal water main have a connection sufficiently close to such premises.
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