If Tenant is a corporation, partnership, trust, association or other entity, Tenant and each person executing this Sixth Amendment on behalf of Tenant, hereby covenants and warrants that (a) Tenant is duly incorporated or otherwise established or formed and validly existing under the laws of its state of incorporation, establishment or formation, (b) Tenant has and is duly qualified to do business in the state in which the Building is located, (c) Tenant has full corporate, partnership, trust, association or other appropriate power and authority to enter into this Sixth Amendment and to perform all Tenant’s obligations under the Lease, as amended by this Sixth Amendment, and (d) each person (and all of the persons if more than one signs) signing this Sixth Amendment on behalf of Tenant is duly and validly authorized to do so.