Standard&Poor's Ratings Services affirmed its ratings on 25 Austin Trust issues, following an omnibus amendment to trust documents. The amendment changes language regarding rating agencies and extends the liquidity facilities on all of the affected trusts to Feb. 15, 2012. The long-term components of the ratings are based on the rating on each trust's respective underlying bonds. The short-term components of the ratings are based on the liquidity facilities provided by Bank of America N.A. Standard&Poor's also took various rating actions on 19 Austin Trust issues following its Nov. 30, 2011, downgrade of its rating on Assured Guaranty Corp. to 'AA-' from 'AA+'. Criteria: Methodology And Assumptions: Approach To Evaluating Letter Of Credit-Supported Debt, July 6,