The examination of drawings may be waived when the plans for the erection or alteration of a building are prepared by a professional engineer or architect, and the professional engineer or architect has stated in writing that he or she has supervised the preparation of the architectural, structural, electrical, plumbing, and mechanical design contract documents, and that he or she will review and approve all working drawings for the construction, and that the document shall, to the best of his or her knowledge conform to all provisions of this code and all rules and regulations adopted under its provisions.