Iowa Code § 602.10106
The members thus appointed shall take and subscribe an oath to be administered by one of the judges of the supreme court to faithfully and impartially discharge the duties of the office. The members shall, in addition to receiving actual and necessary expenses, set the per diem compensation for themselves and the temporary examiners appointed under section 602.10107 at a rate not exceeding the per diem specified in section 7E.6 for each day actually engaged in the discharge of their duties. The duties shall include the traveling to and from the place of examination, the preparation and conducting of examinations, and the reading of the examination papers. The per diem authorized under this section shall be reasonably apportioned in relation to the funds appropriated to the board.
Iowa Code § 602.10106
83 Acts, ch 186, §10202(2) 90 Acts, ch 1256, §54