This office lease form shall be subject and subordinate to all present and future ground leases, overriding leases or underlying leases and/or grants of term of the Land and/or the building or the portion thereof in which the Demised Premises are located. This Section shall be self-operative and no further instrument of subordination shall be required. This form also states that the landlord and the tenant agree to share equally all costs incurred in connection with obtaining any Non-disturbance Agreement from the existing superior lessors or superior mortgagees.