After the ordinance or order for any project under this article has been adopted, an abstract of the ordinance or order, determined by the governing body to contain sufficient information as to give notice of the contents of such ordinance or order, together with the following described notice, shall be published as a Class II legal advertisement in compliance with the provisions of article three, chapter fifty-nine of this code, and the publication area for such publication shall be the municipality or county. The notice to be published with said abstract of the ordinance or order shall state that said ordinance or order has been adopted, that the municipality or county commission contemplates the issuance of the bonds described in the ordinance or order, that any person interested may appear before the governing body, upon a certain date, which shall be not less than ten days subsequent to the date of the first publication of such abstract and notice and which shall not be prior to the date of the last publication by such abstract and notice, and present protests, and that a certified copy of the ordinance or order is on file with the governing body for review by interested parties during the office hours of the governing body. At such hearing all protests and suggestions shall be heard and the governing body shall take such action as it considers proper in the premises: Provided, That if at such hearing written protest is filed by thirty percent or more of the freeholders of the municipality or county, then the governing body of said municipality or county shall not take further action unless four fifths of the qualified members of said governing body assent thereto.