Upon the filing of such a petition in the office of the circuit clerk the court to whom the petition is addressed shall give notice of the time and place of a hearing on the question of the necessity for the organization of such a district and of the boundaries of such district. The notice shall be published at least once each week for 2 weeks in one or more newspapers of general circulation in the proposed district, and a copy of the notice shall be posted in at least 10 of the most public places in the district at least 10 days before the hearing. The hearing shall be held within 20 days after the petition is filed with the circuit clerk.
     The court shall preside at the hearing, and all persons resident within the territory proposed to be organized as a mosquito abatement district shall be given an opportunity to be heard touching the necessity of the organization of such a district and to make suggestions regarding the boundaries of the district. After hearing the statements, evidence and suggestions if the court determines that considerations of public health and welfare make the organization of such a district necessary it shall fix the boundaries of the proposed mosquito abatement district and for that purpose and to that extent it may alter and amend the petition. In case the boundaries as fixed by the court include any territory not included in the boundaries as described in the original petition, the court shall cause a notice to be inserted at least twice in some newspaper of general circulation in the additional territory, which notice shall state the time and place at which a hearing will be held to permit the owners of the land in the additional territory to appear and be heard on the question of including the additional territory. The notice shall be published at least 10 days before the hearing, and the hearing shall be held within 3 weeks after the court first fixes the boundaries. At the hearing the boundaries of the proposed district shall be finally fixed by the court.