After the filing of the proposed resolution, the county planning commission shall hold a public hearing thereon, at which the proposed resolution shall be submitted for discussion, and parties in interest and citizens shall have an opportunity to be heard. Notice of the time, place, and purpose of the hearing shall be published once each week for two consecutive weeks in the official newspaper of the county, and in such other newspapers published in the county as the county planning commission may deem necessary. Said notice shall describe the nature, scope, and purpose of the proposed resolution and shall state the times at which it will be available to the public for inspection and copying at the office of the county auditor.