A waiver by Landlord or by Tenant of a breach or default by the other party under the terms and conditions of this Lease shall not be construed to be a waiver of any subsequent breach or default nor of any other term or condition of this Lease, and the failure of the non-defaulting party to assert any breach or to declare a default by the defaulting party shall not be construed to constitute a waiver thereof so long as such breach or default continues unremedied. No breach of a covenant or condition of this Lease shall be deemed to have been waived by Landlord and/or Tenant, unless such waiver be in writing signed by the waiving party.