Mo. Rev. Stat. § 50.339
In any county of the first classification with more than seventy-one thousand three hundred but less than seventy-one thousand four hundred inhabitants, the salary commission at its meeting in 2003 and at any meeting held in 2004 may equalize the base salary for each office to an amount not greater than that set by law as the maximum compensation. Nothing in this section shall be construed to prevent offices which have additional compensation specified in law from receiving such compensation or from having such compensation added to the base compensation in excess of the equalized salary.
(L. 2003 S.B. 547 § 1)