Iowa Code § 358.35
The board of supervisors to whom the petition is addressed shall preside at the hearing and shall continue the same in session with adjournments from day to day, if necessary, and until completed, without being required to give further notice. At the hearing, all persons interested in the matter of the conveyance and discontinuance of the sanitary district may appear and shall be heard, for and against the conveyance and discontinuance, and the board shall examine into the matter and the equitable distribution of the assets, and equitable distribution and assumption of the liabilities which have accrued during the time the sanitary district has been in existence. The board shall receive evidence on the question from the parties interested, and, after hearing and reviewing the statements, evidence, and suggestions made and offered at the hearing, if it finds that the sanitary district lies wholly or partially within the corporate limits of a city or that the depository of the district is a municipal sanitary sewage system, that the public health, comfort, convenience or welfare will be promoted by the conveyance and discontinuance of the sanitary district and the assumption of the duties, responsibilities and functions of the sanitary district by the city, and that the city has agreed to assume the duties, responsibilities and functions of the sanitary district, shall enter an order specifying the matter and specifying the equitable distribution of the assets, and the equitable distribution and assumption of the liabilities and responsibilities of the sanitary district and setting an effective date of the conveyance and discontinuance.
Iowa Code § 358.35