Service of water shall not be made through a single meter on a common service to two or more parcels of property, whether or not they are separately owned; provided, however that in the event there is no main contiguous to the property for which service may be requested, the department may grant a consumer a permit authorizing him to supply water to the parcel for which service is requested. The consumer holding the permit shall be solely responsible to the city for payment of all the department's charges and any such permit may be revoked by the public works director upon thirty days' written notice. Charges for water used through such a common service shall be based on a monthly block rate for a single meter rate equal to the monthly block rate for a single meter multiplied by the number of parcels served. For example, a meter serving two parcels would be charged two minimums, and be allowed twice the consumption allowance under the minimum charge. Contiguous lots or parcels which are owned by the same consumer shall be deemed to be one parcel if all are occupied by him for business, industrial or horticultural uses. Each lot which is separately occupied for residential purposes, shall be deemed a separate parcel even though owned by the same person. (Ord. 94-10-1189 § 1: Ord. 596 § 2 (part), 1966: prior code § 21.04.090)