If Tenant timely disputes Landlord’s determination of the Fair Market Value rate pursuant to provisions above, then Landlord and Tenant shall each simultaneously submit to the other, in a sealed envelope, its good faith determination of the applicable Prevailing Market rate (collectively referred to as the “ Determinations ”). If the higher of such Determinations is not more than [*] of the lower of such Determinations, then the Fair Market Value rate shall be the average of the two Determinations. If the Fair Market Value rate is not resolved by the exchange of Determinations, then, within twenty (20) days after the exchange of the Determinations, Landlord and Tenant shall each select a commercial real estate broker with at least 10 years’ experience in the Boston Seaport District with working knowledge of current rental rates and practices to determine which of the two Determinations most closely reflects the applicable Fair Market Value rate. Upon such selection, Landlord and Tenant shall each provide to their respective brokers the applicable provisions of this Lease necessary for such determination, including, without limitation, the applicable definitions and criteria (“Lease Provisions”). Landlord’s and Tenant’s brokers shall work together in good faith to agree upon which of the two Determinations most closely reflects the applicable Fair Market Value rate. The Determination chosen by such brokers shall be binding on both Landlord and Tenant as the applicable Base Rent. If either Landlord or Tenant fails to appoint a broker within the twenty (20) day period referred to above, the broker appointed by the other party shall be the sole broker for the purposes hereof. If the two (2) brokers cannot agree upon which of the two Determinations most closely reflects the applicable Fair Market Value rate within thirty (30) days after the expiration of such twenty (20) day period, then, within ten (10) days after the expiration of such thirty (30) day period, the two (2) brokers shall select a third (3 rd ) broker meeting the aforementioned criteria. Once the third broker has been selected as provided for above, then Landlord and Tenant shall provide the Lease Provisions to the third broker and, as soon thereafter as practicable but in any case within thirty (30) days after the selection of the third broker, the third broker shall make its determination of which of the two Determinations most closely reflects the applicable Fair Market Value rate and such Determination shall be binding on both Landlord and Tenant as the applicable Base Rent. If the third broker believes that expert advice would materially assist him, he may retain one or more qualified persons to provide such expert advice. The parties shall share equally in the costs of the 3 rd broker and of any experts retained by such third broker. Any fees of any broker, counsel or experts engaged directly by Landlord or Tenant, however, shall be borne by the party retaining such broker, counsel or expert.