In the August 22, 2017, Federal Register, USDA's Agricultural Marketing Service ("AMS") issued a final rule revising the U.S. Standards for Grades of Shelled Walnuts and the U.S. Standards for Grades of Walnuts in the Shell issued under the Agricultural Marketing Agreement Act of 1946. AMS amended the color requirements to include red-colored walnuts and removed the "Unclassified" section. The rule was effective September 21, 2017.

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