1. After the governing body has made the findings specified in section 67.457 and plans and specifications for the proposed improvements have been prepared, the governing body shall by ordinance or resolution order assessments to be made against each parcel of real property deemed to be benefitted by an improvement based on the revised estimated cost of the improvement or, if available, the final cost thereof, and shall order a proposed assessment roll to be prepared.

2. The plans and specifications for the improvement and the proposed assessment roll shall be filed with the city clerk or county clerk, as applicable, and shall be open for public inspection. Such clerk shall thereupon, at the direction of the governing body, publish notice that the governing body will conduct a hearing to consider the proposed improvement and proposed assessments. Such notice shall be published in a newspaper of general circulation at least once not more than twenty days and not less than ten days before the hearing and shall state the project name for the improvement, the date, time and place of such hearing, the general nature of the improvement, the revised estimated cost or, if available, the final cost of the improvement, the boundaries of the neighborhood improvement district to be assessed, and that written or oral objections will be considered at the hearing. Such notice shall also be sent to the Missouri department of revenue, which shall publish such notice on its website. At the same time, the clerk shall mail to the owners of record of the real property made liable to pay the assessments, at their last known post office address, a notice of the hearing and a statement of the cost proposed to be assessed against the real property so owned and assessed. The failure of any owner to receive such notice shall not invalidate the proceedings.