Any tax, and the revenues derived from the tax, imposed under the provisions of sections 67.1006 to 67.1012 shall be administered by the tourism commission, appointed under the provisions of sections 67.1006 to 67.1012. The revenues received from the tax shall be deposited by the commission in a special fund and used solely for the promotion of tourism within the county with at least fifty percent of the revenue used for joint efforts to promote a state-operated facility for the first five years the tax is in effect. After the expiration of five years, the commission shall decide on the use of the moneys.