Whenever the tax imposed pursuant to the provisions of this chapter is measured by the number of vehicles, devices, machines or other pieces of equipment used, or whenever the tax is measured by the gross receipt derived from the operation of such items, the Collector shall issue only one license; provided, however, he or she may issue for each period for which the license tax has been paid one identification sticker, tag, plate or symbol for each item included in the measure of the tax or used in a business where the tax is measured by the gross receipts derived from such items.
(`78 Code, § 5.02.130.)