Mo. Rev. Stat. § 105.1005: Withholding part of gross compensation of employees to fund plan.

Notwithstanding any other provision of law to the contrary, the state of Missouri, or any city, county, or other political subdivision may enter into a written contract with any of its employees to withhold, in whole or in part, any part of their gross compensation and invest such funds in any such manner as prescribed by the voluntary life insurance plan of the state, or its cities, counties, or other political subdivisions and as permitted under sections 105.1000 to 105.1020.