The text of the petition with the names of petitioners omitted and a notice signed by the clerk of the county legislative authority stating the day, hour, and place of the hearing must be published in three consecutive weekly issues of the official newspaper of the county prior to the date of the hearing. The clerk must also cause a copy of the petition with the names of petitioners omitted, with a copy of the notice attached, to be posted for not less than fifteen days before the date of the hearing in three public places in the proposed district, to be previously designated by him or her and made a matter of record in the proceedings.