Where a license for revenue purposes has been issued to any business by the city and the tax paid for it under the provisions of any ordinance enacted before the ordinance codified in this chapter, and the term of such license has not expired, then the license tax prescribed for the business by this chapter shall not be payable until the expiration of the term of such unexpired license. (Ord. 470 § 2 (part), 1991: prior code § 12-13)