41-6-401. Organization. When any irrigation or drainage district has been organized and the legality of its organization has not been questioned by proceedings in quo warranto, or otherwise, within one (1) year from the effective date of this act as to districts heretofore organized, or within two (2) years from the date of entry of the order of court establishing such district and appointing commissioners therefor as to districts hereafter organized, it shall be conclusively deemed to be a legally established district, and its lawful organization shall not be questioned in any subsequent suit or proceeding.
Wyoming Legal Code