The rate of the tax imposed by Section 3.88.040 shall be one-half of one percent of the selling price or value of the article used, as the case may be provided that during such period as there is in effect a sales tax or use tax imposed by Grays Harbor County under RCW 82.14,030, the county shall receive from the tax imposed under Section 3.88.040 that amount of revenues equal to the lesser of fifteen (15) percent of the tax imposed by the county under said statute.