NEW YORK - Moody's Investors Service said it has downgraded to A1 from Aa3 the rating on Pima County, Ariz.'s approximately $108.0 million of outstanding street and highway user revenue fund (HURF) Series 2008 bonds.

The rating was placed under review for possible upgrade with the publication of a new methodology for U.S. municipal bonds backed by special tax revenues on March 27, 2012.

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