Mo. Rev. Stat. § 204.674: Inapplicability.

The provisions of sections 204.600 to 204.672 shall not apply to the provisions in section 204.472, any city not within a county and any county with a charter form of government and with more than one million inhabitants, any sewer district created and organized under constitutional authority, any sewer district located in any county with a charter form of government and with more than six hundred thousand but fewer than seven hundred thousand inhabitants that provides wholesale sewer service.