The rate of the tax imposed by BCC 4.12.010 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 pursuant to RCW 82.14.030(1), the rate of tax imposed by BCC 4.12.010 shall be four hundred twenty-five/one-thousandths of one percent. (Ord. 3126 § 1, 1982; 1961 code § 5.56.020.)