The signs or devices identifying the dealership at each business location as required pursuant to Vehicle Code Section 11709, shall be of a permanent nature, erected on the exterior of the office or on the display area, and be constructed or painted and maintained so as to withstand reasonable climatic effects and be readable as provided for in Section 11709. A temporary sign or device may suffice when a permanent sign is on order. Evidence of such order shall be submitted to the Department prior to issuance of a temporary permit or license.