To the applicant, the Zoning Officer, the Borough Secretary, the Secretary of the Planning Commission, to abutting owners and owners within 500 feet along the frontage of the lot and within a 150-foot radius of the side and rear lot lines 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 Board, by mailing notice of the time, place and purpose of the hearing at least 14 days in advance of the date fixed for hearing.