Standard&Poor's Ratings Services confirmed its 'A/A-1' rating on District of Columbia's series 2004 variable-rate revenue bonds, issued for the AARP Foundation, due to the bank facility being extended to Aug. 21, 2020. The long-term and short-term components of the rating are based on the ratings on the letter of credit provider, Bank of America N.A. Criteria: Methodology And Assumptions: Approach To Evaluating Letter Of Credit-Supported Debt, Feb. 20, 2015