Where a proposed amendment to the existing Ordinance includes a specific change in a zoning district map, but does not affect districts generally, the hearing notice requirement cited above shall be supplemented by written notice of the date, time, place, nature and purpose of the hearing, to the owner of record, the applicant and to all owners of real property whose property is within the area of the proposed change and to owners whose property is within 200 feet of the perimeter of the real property proposed for change. Such notice shall also include a map showing the existing and proposed boundaries, zoning district boundaries, and existing streets and roads and their names. Such notice shall be sent by certified mail, return receipt requested, postage prepaid, to the last known address of the owners, as shown on the current real estate tax assessment records, and shall be sent at least 15 days prior to the date of the public hearing. Proof of mailing shall be established by the applicant's filing, prior to the commencement of the public hearing, an affidavit of such notice, including an affidavit that both the owner of the subject property and the applicant have also received a copy of such notice, and the receipts of mailing and return receipts.