Mo. Rev. Stat. § 71.014

71.014. Annexation by certain cities upon request of all property owners in area annexed — deannexation, statute of limitations. — 1. Notwithstanding the provisions of section 71.015 , the governing body of any city, town, or village which is located within a county which borders a county of the first classification with a charter form of government with a population in excess of six hundred fifty thousand, proceeding as otherwise authorized by law or charter, may annex unincorporated areas which are contiguous and compact to the existing corporate limits upon notarized petition requesting such annexation signed by the owners of all fee interests of record in all tracts located within the area to be annexed. That a petition requesting annexation is not or was not verified or notarized shall not affect the validity of an annexation heretofore or hereafter undertaken in accordance with this section.

2. Any action of any kind seeking to deannex from any city, town, or village any area annexed under this section, or seeking in any way to reverse, invalidate, set aside, or otherwise challenge such annexation or oust such city, town, or village from jurisdiction over such annexed area shall be brought within five years of the date of adoption of the annexation ordinance.

(L. 1973 H.B. 200 § 1, A.L. 1976 H.B. 1362, A.L. 1978 S.B. 738, A.L. 1984 H.B. 1214 & 1319, A.L. 1986 H.B. 1261, A.L. 1994 S.B. 749, A.L. 2000 H.B. 1238, A.L. 2013 S.B. 58)