Banners are temporary signs which are allowed in non-residential areas subject to the requirements of section 17-10-30 (temporary signs—general requirements) and the following additional requirements:
A. Shall be displayed on the sign-premises.
B. Shall be limited in quantity to one per business.
C. Building-mounted banners shall not exceed a height of 25 feet or the top of the parapet, whichever is less.
D. Freestanding banners shall not exceed a height of ten feet above grade.
E. Sign area shall not exceed 40 square feet.
F. May be displayed up to 21 days, four times per calendar year per business.