Mo. Rev. Stat. § 233.125
In all counties in this state where a special road district, or districts, has or have been organized, or where a special road district, or districts, may be organized under sections 233.010 to 233.165, and where money shall be collected for road and bridge purposes under the provisions of section 137.555 upon property within such special road district, or districts, or where money shall be collected for pool or billiard table licenses upon any business within such special road district, or districts, the county commission shall, as such taxes or licenses are paid and collected, apportion and set aside to the credit of such special road district, or districts, from which said taxes were collected, four-fifths of such part or portion of said road and bridge tax so arising from and collected and paid upon any property lying and being within any such special road district, or districts, and also one-half of the amount collected for pool and billiard table licenses so collected from such business carried on or conducted within the limits of such special road district; and the county commission shall, upon application by said commissioners of such special road district, or districts, draw warrants upon the county treasurer, payable to the commissioners of such special road district, or districts, or the treasury thereof, for four-fifths of such part or portion of said road and bridge tax so collected upon property lying and being within such special road district, or districts, and also one-half of the amount collected for pool and billiard table licenses so collected from such business carried on or conducted within the limits of such special road district, or districts.
§ 233.125, RSMo