United States Standards for Grades of Apples (You can find all the USA Apples Standards from here)
Grades
§ 51.300 U.S. Extra Fancy.
§ 51.301 U.S. Fancy.
§ 51.302 U.S. No. 1.
§ 51.303 U.S. Utility.
§ 51.304 Combination grades.
Color Requirements
§ 51.305 Color requirements.
Tolerances
§ 51.306 Tolerances.
Application of Tolerances
§ 51.307 Application of tolerances.
Methods of Sampling and Calculation of Percentages
§ 51.308 Methods of sampling and calculation of percentages.
Condition After Storage or Transit
§ 51.309 Condition after storage or transit.
Packing Requirements
§ 51.310 Packing requirements.
Marking Requirements
§ 51.311 Marking requirements.
Definitions
§ 51.312 Mature.
§ 51.313 Overripe.
§ 51.314 Clean.
§ 51.315 Fairly well formed.
§ 51.316 Injury.
§ 51.317 Damage.
§ 51.318 Serious damage.
§ 51.319 Seriously deformed.
§ 51.320 Diameter.
U.S. Condition Standards for Export
§ 51.321 U.S. Condition Standards for Export. 4
Metric Conversion Table
§ 51.322 Metric conversion table.