Temporary signs shall not remain in place for a period of more than thirty (30) days except when the Zoning Administrator extends the time period for an additional thirty (30) days. Any further time extension shall thereafter be applied for through Zoning Board of Appeals and the Board may grant such time extension as seems reasonable and necessary in compliance with this Article. A permit is required for all temporary signs. (See Sections 40-3-18 and 40-10-29)