This Lease and any exhibit, rider or addendum that may be attached hereto set forth all the promises, agreements, conditions and understandings between Landlord and Tenant relative to the Premises, and there are no promises, agreements, conditions or understandings, either oral or written, between them other than are herein set forth. Except as herein otherwise provided, no subsequent alteration, amendment, change or addition to this Lease shall be binding upon Landlord or Tenant unless reduced to writing and signed by them.