Portable signs 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. Each sign must be clearly labeled with the name and telephone number of the sign owner.
B. Shall be limited in quantity to one per business.
C. Must be located within 30 feet of a building entrance on the sign-property.
D. May only be displayed during hours of operation and must be removed at the end of each business day.
E. Sign area shall not exceed 12 square feet.