Before holding its public hearing, notice of such hearing shall be given by at least one publication in one or more newspapers of general circulation at least thirty (30) days before the hearing. The notice shall set forth the time and place of the public hearing, the nature and a general description and summary of the Residential Planned Unit Development, and a statement that all papers relating to the Residential Planned Unit Development are on file with the Clerk and open for public inspection. Also, written notice of the hearing on the Residential Planned Unit Development shall be mailed by the Clerk by first class mail, at least twenty (20) days before the date of the public hearing, to all owners of property within 500 feet of the proposed Residential Planned Unit Development and to such others as may be determined should receive such notice. Notices to individual property owners should contain the same information as required of notices published in the newspaper.