Mo. Rev. Stat. § 53.135
53.135 Travel expenses (third and fourth class counties).
53.135. Travel expenses (third and fourth class counties). — The county assessor in counties of the third and fourth classification shall be allowed a reimbursement for actual and necessary travel expenses incurred in the performance of the assessor's official duties within the county at the rate allowed pursuant to subsection 10 of section 50.333 , payable monthly upon the filing of a statement by the assessor with the county commission showing the actual and necessary miles traveled during the month, to be paid out of the county treasury.
(L. 1963 p. 112 § 1, A.L. 1976 H.B. 1090, A.L. 2000 S.B. 894, A.L. 2002 H.B. 1982)