Standard&Poor's Ratings Services lowered its rating on Austin, Texas' series 2005-3 and 2005-4 airport system revenue refunding bonds one notch to 'AAA/A-1' from 'AAA/A-1+'. At the same time, Standard&Poor's affirmed its 'AAA/A-1' rating on Austin's series 2005-1 and 2005-2 airport system revenue refunding bonds. These actions reflect a new letter of credit (LOC) provided by Sumitomo Mitsui Banking Corp. (A+/A-1) for all four aforementioned series, substituting prior LOCs that were assigned as follows: For series 2005-1, an LOC provided by JPMorgan Chase Bank N.A. (A+/A-1), For series 2005-2, an LOC provided by JPMorgan Chase Bank N.A. (A+/A-1), For series 2005-3, an LOC provided by State Street Bank&Trust Co. (AA-/A-1+), and For series 2005-4, an