Appeals; time for hearing; notice; appearance by attorney. The Planning Board shall fix a reasonable time for the hearing of the appeal, giving due notice thereof to the appellant. Said appellant shall, at least 10 days prior to the time appointed for said hearing, give personal notice to all owners of property situate within or without the municipality, as shown by the most recent tax lists of the municipality or municipalities, whose property or properties as shown by said lists are located within 200 feet of the property to be affected by said appeal. Such notice shall be given either by handing a copy thereof to said property owners or by leaving a copy thereof at their usual place of abode, if said owners are the occupants of the property affected by such appeal or are residents of the municipality in which said property is located. Whenever said owners are nonresidents of said municipality, such notice may be given by sending written notice thereof by registered mail to the last known address of the property owner or owners as shown by the most recent tax lists of said municipality. Where the owner is a partnership, service upon any partner as provided above shall be sufficient, and where the owners are corporations, service upon any officer, as set forth above, shall be sufficient. The appellant shall, by affidavit, present satisfactory proof to said Planning Board, at the time of the hearing, that said notices have been duly served as aforesaid. Upon the hearing, any party may appear in person or by agent or by attorney.