CFR›Title 7›Subtitle B›Chapter I›Part 51›Subpart AA ContainsSections 51.2555–51.2562CorpusDaily eCFRDisplayed edition2026-05-20Last updated2026-05-20 Subpart AA—United States Standards for Grades of Shelled Pistachio Nuts Sections 51.2555 § 51.2555 General. 51.2556 § 51.2556 Grades. 51.2557 § 51.2557 Tolerances. 51.2558 § 51.2558 Application of tolerances. 51.2559 § 51.2559 Size classifications. 51.2560 § 51.2560 Definitions. 51.2561 § 51.2561 Average moisture content. 51.2562 § 51.2562 Metric Conversion Table. Source55 FR 28747, July 13, 1990, unless otherwise noted. Previous A Subpart A—Requirements Next B Subpart B—United States Standards for Grades of Apples