Mo. Rev. Stat. § 413.139
413.139 Taximeter increments.
413.139. Taximeter increments. — The display of a taximeter shall be programmed to increment in uniform whole cent money values, at one-tenth of a mile intervals for distance, and at uniform time intervals. The uniform intervals for distance and time apply to both the initial and subsequent intervals.
(L. 1998 H.B. 1856)