Missouri Revised Statutes Title VII. Cities, Towns and Villages § 99.1015. Contracts, authority may transact business, when--validity of authority not to be challenged, when

1. In any suit, action, or proceeding involving the validity or enforcement of or relating to any contract of an authority entered into pursuant to sections 99.1000 to 99.1060, such authority shall be conclusively deemed to have become established and authorized to transact business and exercise its powers under sections 99.1000 to 99.1060 upon proof of the adoption of the appropriate ordinance prescribed in section 99.1006. Each such ordinance shall be deemed sufficient if it authorizes the exercise of powers under sections 99.1000 to 99.1060 by the authority and sets forth the findings of the municipality as required in subdivision (2) of section 99.1006.

2. A copy of such ordinance duly certified by the clerk of the municipality shall be admissible in evidence in any suit, action, or proceeding.

3. No lawsuit to set aside the creation of an authority, the approval of a development plan, development project, development area or development project area, or a tax levied pursuant to sections 99.1000 to 99.1060, or to otherwise question the validity of the proceedings related thereto, shall be brought after the expiration of ninety days from the effective date of the ordinance or resolution in question.