Iowa Code § 468.233
The compensation and expenses of the county board of drainage administrators, for each day or portion thereof necessarily expended in the transaction of the business of a drainage or levee district, shall be paid out of the funds of the district served. The administrators shall file with the auditor or auditors, as the case may be, itemized, verified statements of their time devoted to the business of the district and the expenses incurred. If the administrators transact business of more than one district on a given day, they shall prorate their claims for compensation proportionately among the districts served on that day, but in no case shall a member of the board of county drainage administrators claim or receive a sum in excess of seventeen dollars and fifty cents, plus actual and necessary expenses, for a single day.
Iowa Code § 468.233
89 Acts, ch 126, §2