All of the representations and obligations of Landlord are contained herein and in the Exhibits attached hereto, each of which is incorporated herein by reference so that all references to “ Lease ” herein shall refer to the body of this Lease and all Exhibits thereto; and no modification, waiver or amendment of this Lease or of any of its conditions or provisions shall be binding upon Landlord or Tenant unless in writing signed by Landlord and Tenant or, as to Landlord, by a duly authorized agent of Landlord empowered by a written authority signed by Landlord.