Temporary and/or portable signs subject to the sign regulations shall meet the following requirements:
1. Only one temporary and/or portable sign is allowed per street frontage.
2. A temporary banner shall not exceed 100 square feet in area. All other temporary and/or portable signs shall not exceed 32 square feet in area.
3. If the sign is advertising a particular event, such a sign may be erected not more than seven (7) days prior to the event and shall be removed within five (5) days following the event. No temporary or portable signs shall be displayed longer than ninety (90) consecutive days without removal or replacement.
4. Temporary signs and banners may not be affixed to City light and utility poles without prior approval of the Council.