Mo. Rev. Stat. § 67.669

67.669. Additional fee for short-term rentals of motor vehicles, check-off box provided (Platte County). — 1. Any county of the first classification without a charter form of government with a population of more than fifty-seven thousand inhabitants but less than sixty thousand inhabitants may, by ordinance or order of the governing body of the county and approved by the majority of the qualified voters of the county, require each contract covering the rental of a motor vehicle which is rented within such county on a short-term basis to provide a box which the renter may use to indicate that a one dollar fee may be added to the contract. For purposes of this section "short-term" shall mean a rental contract of less than one month. The fee shall be collected by any business located in such county which rents motor vehicles on a short-term basis upon payment of the contract by the customer.

2. The county collector of such county may provide for collection of such fee on forms provided by the county collector. Failure to collect and remit such fees by any business located in such county which rents motor vehicles on a short-term basis shall be subject to a penalty of five percent per month together with interest as determined by section 32.065 .

3. All revenues collected from the imposition of the fee as authorized by this section shall be used solely for tourism purposes within such county.

(L. 2001 S.B. 323 & 230 § 1)