Iowa Code § 468.281: Meetings of joint boards.

The board of supervisors of any county in which a petition for the establishment of a levee or drainage district to extend into or through two or more counties is on file, may meet with the board or boards of any other county or counties in which such petition is on file, for the purpose of acting jointly with such other board or boards in reference to said petition or any business relating to such district. Any such joint meetings held in either of the counties in which such petition is on file shall constitute a valid and legal meeting of said joint boards for the transaction of any business pertaining to said petition or to the business of such district.