67.550.  Sales tax imposed in certain first class counties — rate of tax — election procedure — revenue to be used to build and maintain certain facilities — effective when — terminates when (St. Charles and Jefferson counties). — 1.  The governing body of any first class county which does not include all or any part of a city with a population of greater than four hundred thousand and which also adjoins a first class county with a charter form of government with a population of at least nine hundred thousand inhabitants is hereby authorized to impose, by ordinance or order, a one-half cent sales tax on all retail sales made in such county which are subject to taxation under the provisions of sections 144.010 to 144.525. The tax authorized by this section shall be in addition to any and all other sales taxes allowed by law, except that no ordinance imposing a sales tax under the provisions of this section shall be effective unless the governing body of the county submits to the voters of the county, at a county or state general, primary or special election, a proposal to authorize the governing body of the county to impose a tax.

  2.  The ballot of submission shall contain, but need not be limited to, the following language:

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If a majority of the votes cast on the proposal by the qualified voters voting thereon are in favor of the proposal, then the ordinance or order and any amendments thereto shall be in effect.  If a majority of the votes cast by the qualified voters voting are opposed to the proposal, then the governing body of the county shall have no power to impose the sales tax herein authorized unless and until the governing body of the county shall again have submitted another proposal to authorize the governing body of the county to impose the sales tax authorized by sections 67.550 to 67.570 and such proposal is approved by a majority of the qualified voters voting thereon.  However, in no event shall a proposal pursuant to sections 67.550 to 67.570 be submitted to the voters sooner than twelve months from the date of the last proposal pursuant to sections 67.550 to 67.570.

  3.  All revenue received by a county from the tax authorized under the provisions of sections 67.550 to 67.570 shall be deposited in a special trust fund and shall be used solely for the construction of a jail, a juvenile facility, a sheriff's office, county administrative and judicial capital improvements, county park development, parking facilities and physical improvements related thereto within such county for so long as the tax shall remain in effect.  Once the tax authorized by sections 67.550 to 67.570 is abolished or is terminated by any means, all funds remaining in the special trust fund shall be used solely for the maintenance of the facilities and buildings constructed with revenues raised by the tax authorized by sections 67.550 to 67.570. Any funds in such special trust fund which are not needed for current expenditures may be invested by the governing body in accordance with applicable laws relating to the investment of other county funds.

  4.  The tax authorized by sections 67.550 to 67.570 shall terminate five years from the date on which such tax was initially imposed by the county, unless sooner abolished by the governing body of the county.