These message centers shall require the granting of a Conditional Use Permit (CUP) by the Planning and Zoning Commission, with power of review by City Council. The steps and process for the consideration of submitted permits for these types of signs shall adhere to the regulations set forth in Section 415.500, Conditional Use Permit Procedure, of the City's Zoning Ordinance. The sizes of these message centers shall be as set forth in Section 415.410, Sign Regulations for "FP," "PS," "NU," And All "R" Districts, but not exceed fifty (50) square feet in overall area.