In business and industrial districts, signs and or advertising devices are permitted only as follows:
A. As permitted in residential districts.
B. Wall signs.
(1) One sign paralleling the street and attached flat to the facade of the establishment advertised as long as such sign does not exceed one square foot in area for each horizontal foot of building frontage and as long as such sign does not project more than 12 inches perpendicularly from the facade.
(2) Open lot businesses, such as auto sales, in which the surrounding unenclosed property serves as a major display area for a relatively small building, may base such sign area on lot frontage such that the sign area does not exceed one square foot per foot of lot frontage, but not to exceed 32 square feet for each 100 feet of frontage.
(3) One sign not to exceed 40 square feet in area on either side, perpendicular to the associated street or sidewalk and located immediately adjacent to or over the entrance to the store or business. Such sign shall not project more than five feet from the face of the building. If such establishment maintains a parking facility, this sign may be freestanding immediately adjacent to the parking lot entrance.
C. Iconic or symbolic signs such as barber poles, clocks, etc., that carry no printed advertising and whose cross-sectional area does not exceed 15 square feet may be displayed in addition to those heretofore described.
D. Stores of businesses sharing common private parking facilities such as shopping centers may cooperatively display one sign next to the public way not to exceed 100 square feet in area. Such sign shall be located adjacent to the parking entrance, shall be no taller than 20 feet nor lower than eight feet from the ground. A directory of participating stores or businesses may be associated with such sign, each store or business to be allotted not more than four square feet of space.
E. Where a structure is set back at least 30 feet from the curbline, a freestanding sign of an area not in excess of 100 square feet on each side may be placed in such a manner that the edge of the sign is not less than 10 feet from the lot line and not higher than 20 feet nor lower than eight feet from the ground.
F. There shall not be more than three exterior signs for each store or business, excluding exit and entrance signs.