(Editor's Note: This press release, originally published earlier today, incorrectly stated the former sovereign rating for the United Mexican States. The corrected version follows.) NEW YORK (Standard&Poor's CreditWire) March 13, 2000--Following its upgrade of the foreign currency rating for the United Mexican States, Standard&Poor's today revised its foreign currency ratings on 14 Mexican corporations. For 11 of the corporations (see list below), the foreign currency rating is upgraded one notch to double-'B'-plus, following the sovereign upgrade to double-'B'-plus. Three of the corporations have had other rating actions taken, reflecting not only the sovereign rating upgrade, but also changing business conditions within the companies themselves. In the case of Coca-Cola-Femsa, the foreign currency rating is upgraded to