Mo. Rev. Stat. § 88.812
In all third class cities, fourth class cities, towns and villages, and all cities having a constitutional charter or a special charter, the assessments made for constructing and repairing sidewalks and sidewalk curbing, and for sewers, and for grading, paving, excavating, macadamizing, curbing and guttering of any street, avenue, alley, square, or other highway, or part thereof, and repairing the same, or for any other improvement authorized by sections 88.497 to 88.663, and sections 88.667 to 88.773, and sections 80.090 to 80.560, and sections 88.777 to 88.797, and sections 88.811 to 88.861, shall be known as "special assessments for improvements", and shall be levied and collected as a special tax, and a special tax bill shall issue therefor and be paid in the manner provided by ordinance. The legislative body of such city, town or village shall cause plans and specifications for all projects, together with an estimate of the total cost for the projects, including construction, construction contingency and fees and other expenses, and an estimate of the portion of the total cost to be assessed against each property to be benefitted by the project, to be prepared by the city engineer or other proper officer, and filed with the clerk of such city, town or village, subject to the inspection of the public, and shall cause notice thereof to be published in some newspaper printed in the county for two consecutive insertions in a weekly paper, and for seven consecutive insertions in a daily paper. A public hearing shall be had before such legislative body upon the request of three or more citizens of such city, town or village, at which hearing citizens may express their assent or objection to such project. These special tax bills may include a reasonable construction contingency and an amount not to exceed twenty percent of the total cost of the improvement to be used for payment of fees and other expenses, and tax bills may bear interest not to exceed the rate on ten-year United States treasury notes as established at the most recent auction; all the tax bills shall become due and payable sixty days after the date of issue thereof, except in the case of tax bills payable in installments as herein provided; and, every special tax bill shall be a lien against the lot or tract or parcel of land described in said special tax bill for a period of ten years after date of issue, unless sooner paid, except in the case of special tax bills payable in installments, the lien of which shall not expire until one year after the date of maturity of the last installment, and except in any case where it becomes necessary to bring a suit to enforce the lien of any special tax bill, the lien of which shall continue until the expiration of the litigation. Notwithstanding the provisions of this section, a constitutional charter city may provide for special assessments for constructing and repairing sidewalks and sidewalk curbing, and for sewers, and for grading, paving, excavating, macadamizing, curbing and guttering of any street, avenue, alley, square or other highway, or part thereof, and repairing the same, upon such terms, conditions and procedures as are set forth in its own charter or ordinances.
§ 88.812, RSMo