(a) Upon completion of the preliminary report and the maps and plans, the county government shall call a public hearing upon a proposal to establish a county district to comprise the area or areas defined in such maps and plans.
(b) The county government shall cause a notice of public hearing to be posted in 4 public places within the proposed district and shall cause a notice of the public hearing to be published at least once in a newspaper published within the County and having a general circulation therein. The first publication thereof shall be not less than 10 days before the date set therein for the hearing. The notice of hearing shall contain a description of the area or areas to be included within the proposed district, and if the report shall have recommended the establishment of zones of assessment, a description of the area or areas to be included within such zones, the improvement proposed, the maximum amount proposed to be expended for the improvement, the allocation of such maximum amount as between the zones of assessment recommended, if any, and shall specify the time and the place where the county government will meet to consider the matter and to hear all parties interested therein concerning the same. In the event that zones of assessment and allocation of cost of the facilities between such zones of assessment are provided for, said notice shall further state that said zones of assessment and said allocations of cost may be changed from time to time by resolution of the county government adopted after a public hearing whenever said county government shall determine that such changes are necessary in the public interest.