Sellers shall have delivered no later than the three (3) Business Days prior to the applicable Closing Date, a Tenant Estoppel on an Approved Form of Estoppel Certificate # for each Government Lease executed by the Government, and # executed by Tenants under Leases that are not Government Leases occupying at least seventy percent (70%) of the rented square footage of each of the respective applicable Improvements (excluding the rentable square footage in such Improvements leased pursuant to Government Leases) (collectively, the “Estoppel Requirement”); provided that # a Seller’s failure to satisfy the Estoppel Requirement shall only constitute the non-fulfillment of the condition set forth in this Section 6.1.4 and the same shall in no event be deemed a default by any Seller under this Agreement, and # in no event shall a Tenant Estoppel be required to be obtained with respect to the Tenants listed on [Schedule 6.1.4] in order to satisfy the Estoppel Requirement (even if such exclusion eliminates the requirement for all non-GSA Tenant Estoppels as to a Property); 6.1.5 Such Closing shall not occur after the Outside Closing Date;

Tenant estoppel certificates (“Tenant Estoppel Certificates”) executed by each tenant under the Leases, shall have been delivered to Purchaser at least three (3) business days prior to the Closing Date (the “Tenant Estoppel Delivery Date”), with such estoppel certificates # to be substantially in the form attached hereto as Exhibit F and made a part hereof, # to be dated within thirty (30) days prior to the Closing Date, # consistent with the terms of the Leases as contained in the copies of the Leases delivered by Seller to Purchaser, and # disclosing no defaults, disputes or controversies under the Leases as of the date thereof; provided, however, that if Seller has not delivered the Tenant Estoppel Certificates by the Closing Date, Seller or Purchaser shall each have the right, to extend the Closing Date to obtain the required Tenant Estoppel Certificates until the earlier to occur of # five (5) business days after the Tenant Estoppel Certificates have been delivered to Purchaser or # thirty (30) days after the originally scheduled Closing Date, by delivering written notice of such extension to the other party on or prior to the Tenant Estoppel Delivery Date. The delivery of said Tenant Estoppel shall be a condition of Closing, but the failure or inability of Seller to obtain and deliver said Tenant Estoppel, Seller having used reasonable efforts to obtain the same, shall not constitute a default by Seller under this Agreement.

At least five (5) business days prior to the Closing, Seller shall obtain and deliver to Purchaser an original executed Tenant Estoppel Certificate from Tenant, which at a minimum shall # be dated within thirty (30) days prior to the Closing Date, # confirm the material terms of the applicable Lease, as contained in the copy of the Lease delivered to Purchaser hereunder, and # confirm the absence of any defaults by Seller and Tenant under the Lease as of the date thereof.