Missouri Revised Statutes Title XXIV. Business and Financial Institutions § 379.1855. Coverage and premiums based on replacement cost value--determined how

(1) The dwelling coverage amount set forth in the most recent evidence of insurance coverage provided by the mortgagee (“last known coverage amount” or “LKCA”), if known to the lender or servicer;

(2) The insurer shall inquire of the insured at least once as to the LKCA, and if it is not able to obtain the LKCA from the insured or in another manner, the replacement cost value may be determined as set forth in subdivision (3) or (4) of this subsection;

(3) If the LKCA is unknown and cannot be obtained from the insured or in another manner, the replacement cost of the property serving as collateral as calculated by the insurer, unless the use of replacement cost for this purpose is prohibited by other law;

(4) If the LKCA is unknown and cannot be obtained from the insured or in another manner, and the replacement cost is not available or its use is prohibited, the unpaid principal balance of the mortgage loan.