Missouri Revised Statutes Title VI. County, Township and Political Subdivision Government § 68.255. Statute of limitations

No lawsuit to set aside a district established or a tax levied under this act,  1 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 circuit court judgment establishing such district in question or the effective date of the resolution levying such tax in question.