89.144. 1. Any third class city having a population of morethan twenty-five thousand inhabitants may, by ordinance, adoptand enforce regulations governing zoning, planning, subdivisionand building within all or any portion of the unincorporated areaextending two miles outward from the corporate limits of the cityif the city has a zoning commission and a board of adjustmentestablished pursuant to sections 89.010 to 89.140. Whenauthorized by ordinance, the zoning commission and the board ofadjustment of the city shall have the same powers within theunincorporated area as they have within the corporate limits ofthe city.
2. The ordinances, before passage, must be approved by orderof the county commission of the county in which theunincorporated area is located and the ordinances shall not bemore, but may be less, restrictive than the ordinances governingzoning, planning, subdivision and building within the corporatelimits of the city. If building permits are required by theordinances, they shall be issued without fee.
3. In the event the county in which the unincorporated areais located shall create a county planning commission and theplanning commission shall adopt an official master plan for theunincorporated areas of the county in accordance with theprovisions of chapter 64, RSMo, the authority granted the cityunder the terms of this section shall terminate.
(L. 1971 H.B. 145)