Mo. Rev. Stat. § 162.073: Definitions.

For the purposes of sections 162.071, 162.073, 162.152, 162.171, 162.181, 162.191, 162.201, 162.241, 162.301, 162.311, 162.821 and 167.121, in those counties without a county commission, the following words shall have the following meaning:

(1) "County clerk" shall mean the vice-chairman of the county legislature or county council;

(2) "County commission" shall mean the county legislature or county council;

(3) "Presiding commissioner of the county commission" shall mean the chairman of the county legislature or county council.