If required, the Planning Commission shall provide for an adequate hearing and shall notify by mail, at least five days prior to the hearing, all property owners within 300 feet of the extreme limits of the proposed subdivision as their names appear on the Municipal tax record. In addition, the owner shall be notified of the hearing by certified mail not less than five days prior to the date fixed for the hearing. Such notices shall state the time and place of the hearing, give a brief description of the proposed subdivision and also state that a copy of the proposed plat of the subdivision is on file with the City Clerk for public inspection.