In addition to those signs permitted by Section 17.38.120, each shopping center, subject to Section 17.52.520; and as qualified below, may be permitted shopping center master identification sign(s) subject to site development review, pursuant to Section 17.54.210 to assure conformance to established or proposed design theme of the shopping center signing program. The shopping center master identification sign shall be located at one or more main entrances to the shopping center, shall not exceed one hundred (100) square feet in area, shall not exceed twenty-five (25) feet in height, and shall be permitted for shopping centers which contain no less than twenty (20) separate tenants. The shopping center master identification sign shall not advertise or identify any tenant of the shopping center and shall be located in a planter of appropriate dimension. (Prior gen. code § 8-48.8.3)