All businesses, services and processes shall be conducted entirely within a completely enclosed structure, except for conditional uses, outdoor dining areas, nurseries and garden shops, seasonal sales lots, outdoor equipment, outdoor furniture, dispensers, vehicle and boat sales, and bus stations. When outside storage is allowed as a conditional use, it must be enclosed within a six-foot high sight-obscuring fence. In addition, temporary sales of products allowed either as an outright permitted or a conditionally permitted use, for no more than seven consecutive days, may be conducted outside on private property. These sales may occur no more than four times during a calendar year. The seller must have a current city business license and required parking spaces must remain available for use by vehicles.