When an application for appeal has been filed in proper form with the Board of Appeals and the application fee has been paid, the Zoning Administrator shall immediately place the request upon the calendar for public hearing before the Board of Appeals. The Board shall hold a public hearing within fifty (50) days after the receipt of a complete application for an appeal. The Board of Appeals may recess such hearings from time to time, and, if the time and place of the continued hearing is publicly announced at the time of the adjournment, no further notice shall be required. Any person in interest may appear at the public hearing in person or by attorney.