Any matter admitted under rule 161-9.10 (216) is conclusively established in all proceedings relating to the pending complaint unless the court or contested case administrative law judge on motion permits withdrawal or amendment of the admission. The court or contested case administrative law judge may permit withdrawal or amendment when the presentation of the merits of the action will be subserved thereby and the commission or the party opposing the motion fails to satisfy the court or contested case administrative law judge that withdrawal or amendment will prejudice the commission in maintaining the commission's action on the merits.
Iowa Admin. Code r. 161-9.11