Mo. Rev. Stat. § 321.180
The treasurer shall keep strict and accurate accounts of all money received by and disbursed for and on behalf of the district in permanent records. He shall file with the clerk of the court, at the expense of the district, a corporate fidelity bond in an amount to be determined by the board for not less than five thousand dollars, conditioned on the faithful performance of the duties of his office. He shall file in the office of the county clerk of each county in which all or part of the district lies a detailed financial statement for the preceding fiscal year of the district on behalf of the board, on or before April first of the following year. The fiscal year of the board shall be the same as the calendar year, beginning January first of each year and ending December thirty-first of the same year.
(L. 1947 V. I p. 432 § 19, A.L. 1965 p. 509, A.L. 1978 H.B. 1115, S.B. 628)