 The rating on the principal only class, Cl. A-PO, was affirmed due to the sufficiency of the classs credit support and the pools share of defeasance. The rating on the IO class, Cl. IO, was downgraded due to the decline in the credit quality of its reference classes resulting from principal paydowns of higher quality reference classes. The ratings of Credit Tenant Lease CTL deals are primarily based on the senior unsecured debt rating or the corporate family rating of the tenants leasing the real estate collateral supporting the bonds. 