To the Applicant, Zoning Officer, Township Manager, Secretary of the Planning Commission, Board of Supervisors, abutting Owners and Owners within 500 feet of the Lot, and to any Person who has made timely request for the same, or their legal counsel (if such counsel shall have filed appearance with the ZHB) by mailing notice of the time, place and purpose of the hearing at least 15 days in advance of the date fixed for hearing. In addition to the written notice provided herein, written notice of said hearing shall be conspicuously posted on the affected Tract of land at least one week prior to the hearing.