Modifies provisions relating to the modernization of certain property assessment practices

HB 3200 modernizes property tax assessment rules in Missouri, directly affecting property owners and county assessors across all counties and the City of St. Louis. It sets new tax rates for specific property types, including 5% for solar energy systems (previously 12% for farm machinery) and 12% for livestock and poultry. The bill also changes airport-related property valuation by reducing assessments for certain possessory interests where private parties funded improvements after 2008. Additionally, it requires counties to submit biennial assessment maintenance plans for approval and clarifies evidence needed when computer-assisted valuations are used.