Mo. Rev. Stat. § 182.145: Cities maintaining library prior to August 29, 1955, may levy tax for and maintain library.

Any incorporated city having lawfully established a free public library prior to the effective date of section 182.140, and having had at that time authority to levy and collect a tax for the establishment and maintenance of the library, may levy and collect a tax for the maintenance of the library, and reduce or increase the tax in the manner provided in section 182.140.