Notwithstanding any other provisions of this chapter, no off-premises sign will be permitted unless all of the following conditions have been met:
1. The location of said sign must be in a B-1, B-2, I-1, or 1-2 zoning district.
2. The location of said sign is not within 100 feet of an R-1, R-2, R-3, R-4, or R-5 zoning district.
3. Billboards located on the same street facing the same traffic flow shall not be located closer together than 500 feet. Double-faced signs shall be considered as facing traffic flowing in the opposite direction.
4. The height of said sign is within all height limitations of the zoning district in which the sign is located.
5. The size of said sign shall be limited to 300 square feet in area. Double-faced signs shall be permitted. If a single-faced sign is erected, the back shall be suitably painted or otherwise covered to present a neat and clean appearance.
6. Billboards attached to a building shall not project above the roof line of the building or be located on the roof of a building.
7. All billboard sign permits shall require a special use permit approved by the Board of Adjustment.