All signage requirements otherwise applicable under the City Code shall be observed, provided however, a sexually oriented business shall be limited to one (1) wall-mounted sign no greater than one (1) square foot of sign per one (1) foot of wall length, not to exceed a total of fifty (50) square feet, which sign shall not flash, blink or move by mechanical means, shall not extend above the roof line of the building and shall not exceed eight (8) feet in height from ground level. Further, no merchandise, symbol or pictures of products or entertainment on the premises shall be displayed in window areas or on any sign or any area where such merchandise or pictures can be viewed from the exterior of the building. No flashing lights and/or lighting which leave the impression of motion or movement shall be permitted. No temporary signs shall be allowed.