SINGAPORE (Standard&Poor's) Sept. 18, 2012--Standard&Poor's Ratings Services today assigned its 'AA-' issue rating and 'axAAA' ASEAN regional scale rating to an issue of Singapore dollar (S$) 250 million in senior unsecured fixed rate notes by SP PowerAssets Ltd. (SPPA; AA-/Stable/--; axAAA/--). The notes are issued under the company's S$8 billion global medium-term notes program. We derived the rating on the notes from the 'AA-' long-term corporate credit rating on SPPA. The company is a wholly owned subsidiary of Singapore Power Ltd. (AA-/Stable/--; axAAA/--), which the Singapore government's investment holding company, Temasek Holdings (Private) Limited (AAA/Stable/A-1+), owns. RELATED CRITERIA AND RESEARCH SP PowerAssets Ltd.'s US$500 Million Senior Unsecured Fixed Rate Notes Assigned 'AA-' Rating, Sept. 11, 2012