Mo. Rev. Stat. § 493.070

In all cities of this state which now have, or shall hereafter have, a population of one hundred thousand inhabitants or more, all public notices and advertisements, directed by any court, or required by law to be published in a newspaper, shall be published in some daily newspaper of such city, of general circulation therein, which shall have been established and continuously published as such for a period of at least three consecutive years next prior to the publication of any such notice.