Standard&Poor's Ratings Services assigned its 'AAA/A-1+' and 'AAA' ratings to UBS Securities LLC custodial residual and variable securities (CRVS) series 2007-1023, respectively. The long-term component of the rating is based on the 'AAA' rated, FGIC-insured Louisiana Public Facilities Authority revenue bonds (Nineteenth Judicial District Court Building Project) series 2007. The short-term component of the rating is based on a standby purchase agreement provided by Bank of New York (A-1+) that is scheduled to expire on June 15, 2008. The floater CRVS holders' ability to receive the purchase price from the liquidity provider may terminate without notice under certain conditions set forth in the documents. The short-term portion of the rating does not apply to any residual CRVS. The
