Mo. Rev. Stat. § 590.150
The provisions of sections 590.100 to 590.180 shall not apply to a political subdivision having a population of less than two thousand persons or which does not have at least four full-time paid peace officers unless such political subdivision is located in a county of the first class having a charter form of government; provided, however, the governing body of the political subdivision may by order or ordinance elect to come under the provisions of sections 590.100 to 590.180 or such election may be later rescinded and, provided further, that upon election to come under the provisions of sections 590.100 to 590.180 the political subdivision shall be entitled to authorize the fees allowed by section 590.140*, otherwise, such fees shall not be collected.
(L. 1978 H.B. 879 & 899 § 11, A.L. 1988 S.B. 532)
*Transferred 2000; now 488.5336