Mo. Rev. Stat. § 94.800

In addition to any other taxes provided by law, tourism taxes may be imposed by certain municipalities pursuant to sections 94.802 and 94.805 and shall be administered in accordance with the provisions of sections 94.800 to 94.825; provided, however, that if any municipality imposes a local sales tax or a local gross receipts tax for the purpose of promoting tourism under any other statutory or charter authorization, such municipality shall not also impose a tourism tax pursuant to section 94.802 or section * 94.805.