Mo. Rev. Stat. § 115.509
Current with changes from the 2023 Legislative Session
If the secretary of state fails to receive any abstract for one mail after it is due, he shall dispatch a messenger to the county not returned, with the direction to deliver the abstract, unless circumstances clearly justify a longer delay, which in no case shall exceed thirty days.
§ 115.509, RSMo
Effective 1/1/1978