There is imposed a charge for the purposes authorized in Section 3.108.030 of this chapter, which charge is in addition to the ordinary business operations tax as it is imposed upon businesses conducting their activities within the area by Chapter 3.08 of this code. Such additional charge is imposed at the rates set forth in Section 3.108.050 of this chapter for the specified business classifications regardless of whether the business is taxed upon a flat rate or gross receipts or other basis under the provisions of Chapter 3.08 of this code. (Prior code § 23.11.813)