After the engineer's report is filed, the board shall give notice as provided in section 357D.4, of a public hearing to be held concerning the engineer's preliminary plat. After, and within ten days of, the hearing, the board shall approve or disapprove the preliminary plat. If the preliminary plat is disapproved, the board shall make changes in the boundaries as it deems necessary for board approval of the preliminary plat.
Iowa Code § 357D.7