A sign applicant or agent for a building occupied by a multiple-tenanted building must apply to the Planning Board for a comprehensive sign design review. The comprehensive sign design review is a vehicle to encourage the imaginative integration of signage into the framework of a new or existing building. Under this plan, the total area of signs on a single- or multiple- tenanted building may, upon approval of the Planning Board, be at variance to the maximum regulations set forth in the sign ordinances. Upon completion, the necessary application is to be filed with the Construction Official.