This excerpt taken from the PAE 20-F filed Mar 15, 2007.
Ownership of Improvements
Any fixtures or Improvements installed by Tenant, or by Landlord on Tenants behalf, shall immediately upon installation become the property of Landlord without compensation to Tenant. Except in the circumstances specifically described in Section 10.6, such fixtures or Improvements shall not be removed from the Premises either during or at the expiration or earlier termination of the Term. Landlord is under no obligation to repair, maintain or insure the Improvements.