Iowa Admin. Code r. 721-25.29
Upon written request of a party or on the presiding officer's own motion, the presiding officer may review a preliminary order of the administrative law judge, such as a ruling on a motion to quash a subpoena or other prehearing motion. In determining whether to do so, the presiding officer shall weigh the extent to which the presiding officer's granting of the interlocutory appeal would expedite final resolution of the proceeding and the extent to which review of the interlocutory order at the time of the issuance of a final decision would provide an adequate remedy. Any request for interlocutory review must be filed within seven days of issuance of the challenged order, but no later than the date for compliance with the order or the date of hearing, whichever is earlier.
Iowa Admin. Code r. 721-25.29