The Zoning Administrator, in accordance with the provisions herein, is authorized to issue permits for the erection and maintenance of temporary commercial signs, which includes banners and wind activated devices. Such permit shall not be issued for a period in excess of 60 days in one calendar year, within the A-Agriculture District not to exceed 90 days within one calendar year. Temporary commercial sign permits shall be issued for signs which advertise or call attention to temporary business promotions. Temporary commercial signs shall not be illuminated. No temporary signs containing commercial messages shall be permitted in residential districts. No permit shall be issued for aerial signs or signs designed to be moved on trailer wheels, skids or on other similar devices. The area, height and number of temporary commercial signs shall be determined by the requirements set forth in the regulations for each zoning district.