The rate of the tax levied and imposed by Section 3.32.010 shall be one-half of one percent of the selling price or value of the article used, as the case may be; provided, however, that during such period as there is in effect a sales or use tax imposed by King County, the rate of tax imposed by this chapter shall be limited to four hundred twenty-five one-thousandths of one percent. (Ord. 522 § 2, 1970).