Missouri Revised Statutes Title VII. Cities, Towns and Villages § 81.075. Officers--elections (cities attaining 3,000 to 10,000 after grant of charter in certain counties)

At the next municipal election in all cities and towns under special charter, located in counties of the first class under a charter form of government, which have attained a population of three thousand inhabitants and not more than ten thousand inhabitants subsequent to the granting of their special charter, and at each municipal election thereafter, there shall be elected a mayor, a police judge and two councilmen from each ward, each of whom shall hold his respective office   1 for four years and until his successor is elected and qualified;  provided that at the next municipal election there shall be elected one councilman from each ward, who shall serve for a term of four years, and the year next following such an election, at the time of holding the general election for municipal officers, there shall be elected one councilman from each ward, who shall serve for a term of one year, after which election there shall be elected at each succeeding municipal election one councilman from each ward, who shall serve for a period of four years.