As used in this chapter, the following terms shall have the meanings indicated:
Any building used by a business or for a business purpose, or portion thereof used primarily for commercial or industrial activity, which is either open to the public, not open to the public or occupied by employees, including, but not limited to, warehouses, factories, storage facilities, aircraft hangars, garages, wholesale distribution facilities and offices or other similar spaces within such buildings. For purposes of applying these rules, "commercial building" shall not include those buildings that are occupied 24 hours a day, seven days a week.
An approved wall-mounted key vault system, which has a given level of security to protect keys and paper work, in which the key locking and unlocking is controlled by the Fire Chief and Police Chief.