Upon the completion of the proposed charter the governing body shall hold a public hearing at which the citizens shall have an opportunity to be heard with respect thereto. Notice of the time and place of such hearing and the text of the charter, or an informative summary thereof, shall be published twice in a newspaper of general circulation in the county, with the first notice appearing no more than 28 days before and the second notice appearing no less than seven days before the hearing. Such hearing may be adjourned from time to time, but shall be completed not less than thirty days before the election. Upon completion of the hearing the governing body shall adopt the charter with such revisions as it may accept.