Mo. Rev. Stat. § 137.490
The assessor, or his deputies under his direction, shall assess all the taxable real property within the city and all tangible personal property taxable by the city under the laws of this state in the manner provided in sections 137.485 to 137.550 and as otherwise provided by law, and for that purpose the assessor may divide and assign the work or any of it among them. They shall commence their assessment on the first day of January in each year and complete the assessment, and the deputies make their final reports thereof to the assessor, on or before the first day of April next following. The assessor shall see that the assessment is made uniform and equal throughout the city. If the assessor proposes to increase any assessment of real property, he shall give notice of the fact to the person owning the property affected, his agent or representative, by personal notice, or by mail directed to the last known address.
(L. 1945 p. 1859 § 7, A.L. 1959 H.B. 108)
CROSS REFERENCE:
Assessor qualifications, RSMo 82.560