The following building materials shall be allowed in the construction of the exterior walls of buildings and structures constructed and installed in a C-3 Highway Business District in the City:

    A.    The exterior walls of a building or structure that is visible from a public right-of-way shall be constructed of one or more of the following:  (a)  brick;  (b)  brick veneer; (c)  natural stone; (d)  marble;  (e)  granite;  or, (f)  glass.

    B.    The exterior walls of a building or structure that is not visible from a public right-of-way shall be constructed of one or more of the following:  (a)  any of the materials listed in the proceeding subparagraph "A" of this Section 17.30.100 of the Zoning Code and/or (b) architectural cement blocks; and/or , (c)  stucco."