Iowa Code Title I. State Sovereignty and Management [Chs. 1-38D] § 29A.52. Malice must be proved

No action or proceeding shall be maintained against any officer appointing a military court or against any member of a military court or commission, officer or agent acting under its authority, or reviewing its proceedings, on account of the imposition of a fine or penalty or for the execution of a sentence of any person, unless it be shown that such officer, member or agent has acted from motives of malice.