Iowa Admin. Code r. 129-21.4
Applications for certification must be received by the office at least ten days prior to the closure of the next applicable assessment deadline to be considered by the office for purposes of that reporting cycle. If the office does not receive an application within that time frame, the office may deny the application or consider the application as part of the next assessment cycle. Except as otherwise authorized by the office, an application for certification shall be deemed filed on the date of its actual receipt by the office. Notwithstanding the foregoing, except as otherwise authorized by the office, when an application for certification is filed during an open 20-day appeal period specified in 129-subrule 20.5(1) following the publication of an updated statewide map in accordance with rule 129-20.4 (8B,427), an application for certification will not be deemed filed prior to the expiration of the 20-day appeal period.
Iowa Admin. Code r. 129-21.4