Missouri Revised Statutes Title XV. Lands, Levees, Drainage, Sewers and Public Water Supply § 243.140. Lands lying outside district may be annexed, when--proceedings

1. Any land lying outside of any drainage district as organized, the owner or owners of which shall thereafter make connection with any main ditch or drain, or other drain in any district, or whose lands are or will be benefitted by the work or drainage district, shall be deemed to have made voluntary application to be included in such drainage district, and thereupon the county commission shall obtain a description of such land benefitted and amount of benefits in same manner as provided for construction of ditches in this chapter, the name of the owner or owners thereof, and a description of the ditch or drain making such connection, and file the same in its records.

2. Said county commission shall then fix a day, not less than fifteen days from such filing, when it will hear complaints, and thereupon the clerk of said county commission shall give ten days' notice thereof in writing to such owners, which notice shall be served by reading or delivering a copy thereof to such owner or owners of, if a nonresident, to his tenant, and affidavit of such service shall be evidence thereof. At the time fixed, the county commission shall render its decision in said cause, and shall file copies thereof with the clerk of the county commission, giving a description of any land annexed, and such lands shall be deemed a part of such district, and shall be assessed as other lands therein for maintaining said ditches.