Code of Federal Regulations Title 7. Agriculture § 7.51.302 U.S. No. 1

“U.S. No. 1” consists of apples which meet the requirements of U.S. Fancy grade except for color, russeting, and invisible water core. In this grade, less color is required for all varieties listed in table 1 of § 51.305. Apples of this grade are free from excessive damage caused by russeting which means that apples meet the russeting requirements for U.S. Fancy as defined under the definitions of “damage by russeting,” except the aggregate area of an apple which may be covered by smooth net-like russeting shall not exceed 25 percent;  and the aggregate area of an apple which may be covered by smooth solid russeting shall not exceed 10 percent:  Provided, That, in the case of the Yellow Newtown or similar varieties, the aggregate area of an apple which may be covered with smooth solid russeting shall not exceed 20 percent;  and that smooth net-like russeting shall not be scored against the Fuji variety under any circumstances. Each apple of this grade has the amount of color specified in § 51.305 for the variety. Invisible watercore shall not be scored in this grade. (See §§ 51.305 and 51.306.)