Allowed Fence and Wall Materials. Except as provided in Sections 9-2.1401(a)(2) and (b)(2) and this Subsection (d)(2), all materials for fencing erected within the front, side or rear yard of real properties in the Single-Family Residential (R-1), Agricultural Single-Family Residential (A-1), Medium Density Residential (MDR), Multiple-Family Residential (M-R), and Mixed Commercial/Single-Family Residential (M-C-R) Zones shall be limited to masonry, wrought iron, heavy duty decorative vinyl, cedarwood, and redwood. The Planning Director may approve other types of fence materials if he or she finds the material is of a durability that is comparable to the list of approved fence materials listed in this paragraph.