The circuit court with jurisdiction over the formation of a sewer subdistrict and extension of the boundaries of a common sewer district to include such subdistrict pursuant to section 204.565 shall, within thirty days after receiving the petition, schedule a public hearing on the petition. The clerk of the circuit court having such jurisdiction shall give notice of the time and the place of the public hearing by publication at least once each week for three consecutive weeks in one or more newspapers having a general circulation in the proposed subdistrict and in the common sewer district. Such notice shall state that the subdistrict will, upon its formation, be a subdistrict of the common sewer district, which will be identified by name, and shall describe either the boundaries of the proposed subdistrict or the area to be included within the proposed subdistrict. If the court shall find formation of such subdistrict reasonable or necessary, the court shall enter its decree extending the boundaries of the common sewer district, declaring the area to be a sewer subdistrict of the common sewer district, and approving the map submitted by the petitioners. The decree and map shall then be filed by the circuit clerk in the office of the recorder of deeds for each county in which any portion of such subdistrict and of the common sewer district is situated and with the county commission or county legislature, as the case may be, of each such county.