Standard&Poor's Ratings Services placed its rating on Pennsylvania Housing Finance Agency PNC Bank N.A., Pittsburgh, Pa. liquidity facility-backed single-family mortgage revenue bonds series 2005-90C on CreditWatch with negative implications. This action follows Standard&Poor's placement of its rating on PNC Bank N.A., Pittsburgh on CreditWatch with negative implications. USPF Criteria: "Bank Liquidity Facilities," June 22, 2007