U.S. No. 1 consists of onions which meet the following requirements:

1. (a) Basic requirements:

   1. (1) Similar varietal characteristics, except color when designated as a specialty or mixed pack;
   2. (2) Mature;
   3. (3) Fairly firm; and,
   4. (4) Fairly well shaped.

2. (b) Free from:

   1. (1) Decay;
   2. (2) Wet sunscald;
   3. (3) Doubles; and,
   4. (4) Bottlenecks.

3. (c) Free from damage caused by:

   1. (1) Seedstems;
   2. (2) Splits;
   3. (3) Dry sunken areas;
   4. (4) Sunburn;
   5. (5) Sprouting;
   6. (6) Staining;
   7. (7) Dirt or foreign material;
   8. (8) Mechanical;
   9. (9) Tops;
   10. (10) Roots;
   11. (11) Translucent scales;
   12. (12) Watery scales;
   13. (13) Moisture;
   14. (14) Disease;
   15. (15) Insects; and,
   16. (16) Other means.
4. (d) For size and tolerances see §§ 51.3198 and 51.3199.

[60 FR 46980, Sept. 8, 1995, as amended at 79 FR 63294, Oct. 23, 2014]