The rates of tax set forth in Selah Code Section 4.34.040 shall be measured against a maximum of the first two thousand dollars of total gross income derived from any one customer account, metered service or other separately identified billing account in any one month or fraction thereof. This customer tax base applicability shall only apply to the businesses specifically mentioned in Section 4.34.040(1), (2), (3), and (4), namely the furnishing of electricity, telephone business, natural gas, and the transmission of television by cable. All other utility occupations subject to this tax shall not be limited by the customer account base limitation and shall apply the tax upon gross income without limitation. (Ord. 810, § 2, 1983.)