Said applicant or appellant shall, at least 10 days prior to the time appointed for said hearing, give notice to all owners of property situate within or without the Town of West New York and within 200 feet of the property to be affected by said appeal. Such notice shall be given either by registered mail or by being served personally at their usual place of abode if said owners are the occupants of the property affected by such appeal. Whenever said owners are nonresidents of the Town of West New York, 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 the town. Where the owner is a partnership, service upon any partner as above provided shall be sufficient, and where owners are corporations, service upon any officers, as above provided, shall be sufficient. The appellant shall by affidavit present satisfactory proof to the Board of Adjustment at the time of the hearing that said notices have been duly served as aforesaid. Upon the hearing any party may appear in person, by agent or by attorney.