Section 198.570 - When ordinances take effect(1) Except as provided by subsection (2) of this section, an ordinance shall take effect on the 30th day after it is adopted, unless a later date is prescribed by the ordinance. If an ordinance is referred to the electors of the district, it shall not take effect until approved by a majority of those voting on the ordinance.(2) An emergency ordinance may take effect upon adoption. 1971 c.268 §7; 1983 c.350 §3