Section 13.7 This Agreement may not be modified or amended, except by an agreement in writing signed by an approved representative of Shipper and Carrier. The parties may waive any of the conditions contained herein or any of the obligations of the other party hereunder, but any such waiver shall be effective only if in writing and

                                            signed by the party waiving such conditions or obligations.

                  Section 13.8

                     Each person executing this Agreement warrants and represents that he is fully authorized to do

                                                       so.
