Mo. Rev. Stat. § 305.565

Counties, cities, villages, incorporated towns, and other municipal corporations, political subdivisions and public bodies, and public officers of any thereof, all banks, bankers, trust companies, savings banks and institutions, building and loan associations, savings and loan associations, investment companies, insurance companies and associations, and all executors, administrators, guardians, trustees and other fiduciaries may legally invest any sinking funds, moneys, or other funds belonging to them or within their control, in any bonds issued by the authority pursuant to the provisions of sections 305.500 to 305.585.