A record of all proceedings of an intercounty levee or drainage district shall be maintained by the auditor of each county in which a portion of the district lies, as provided by sections 468.172 and 468.173 , but the records in the office of the auditor of the county having the largest acreage in the district shall be the official records of said district. [C71, 73, 75, 77, 79, 81, §457.29 ] 89 Acts, ch 126, §2 CS89, §468.298