The rate of the tax imposed by Section 5.98.010 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 Clark County, the rate of tax imposed by this chapter shall be at a rate of four hundred twenty-five-thousandths of one percent. (Ord. M-1199 §2, 1970)