Iowa Code § 229.35: Compensation — payment.

Said commissioners shall be entitled to their necessary expenses and a reasonable compensation, to be allowed by the judge, who shall certify the same to the director of the department of administrative services who shall thereupon draw the proper warrants on any funds in the state treasury not otherwise appropriated. The applicant shall pay said costs and expenses if the judge shall so order on a finding that the complaint was filed without probable cause.