This Lease shall not be assigned or the Leased Property sublet in whole or in part by Tenant without the prior written consent and approval of Landlord, which approval shall not be unreasonably withheld, and if such consent and approval should be given, Tenant shall nevertheless remain liable for rents and performance of all other provisions of this Lease as though any such assignment or subletting has not been made. Landlord shall have the right to sell the Building at any time during the Lease Term, subject only to the rights of Tenant hereunder. In the event of the sale or exchange of the Building and the assignment of this Lease, Landlord shall be relieved of all liability for the covenants and obligations in or derived from this Lease, or arising out of any act, occurrence or omission relating to the Leased Property or this Lease. The covenants, representations, and obligations of Landlord shall be binding on Landlord only during the period that Landlord has an ownership interest in the Building. Further, Landlord shall have the right to subordinate this Lease to any mortgage presently existing or hereafter placed upon the Building by so declaring in such mortgage. Within ten (10) days following receipt of a written request from Landlord, Tenant shall execute and deliver to Landlord, without cost, any instrument which Landlord deems reasonably necessary or desirable to confirm the subordination of this Lease and an estoppel certificate in such form as Landlord may reasonably request certifying (i) that this Lease is in full force and effect and unmodified or stating the nature of any modification, (ii) the date to which rent has been paid, (iii) that there are not, to Tenant's knowledge, any uncured defaults or specifying such defaults if any are claimed, and (iv) any other matters or state of facts reasonably required respecting the Lease. Such estoppel may be relied upon by Landlord and by any purchaser or mortgagee of the Building. Notwithstanding the foregoing, if the mortgagee shall take title to the Leased Property through foreclosure or deed in lieu of foreclosure, Tenant shall be allowed to continue in possession of the Leased Property as provided for in this Lease so long as Tenant shall not be in default.