---
kind: "section"
citation: "7 C.F.R. § 51.1541"
title: "7"
number: "51.1541"
heading: "U.S. No. 1."
url: "https://uscodex.org/cfr/7/51.1541"
---

# §51.1541. U.S. No. 1.


“U.S. No. 1” consists of potatoes which meet the following requirements:

- (a) Similar varietal characteristics, except when designated as a mixed or specialty pack;
- (b) Firm;
- (c) Fairly clean; 2
- (d) Fairly well shaped;
- (e) **Free from—**
  - (1) Freezing;
  - (2) Blackheart;
  - (3) Late blight, southern bacterial wilt and ring rot; and,
  - (4) **Soft rot and wet breakdown.**
- (f) **Free from damage by any other cause.** See §§ [51.1564](/cfr/7/51.1564.md) and [51.1565](/cfr/7/51.1565.md).
- (g) **Size.** Not less than 1 7/8 inches in diameter, unless otherwise specified in connection with the grade.
- (h) For tolerances see [§ 51.1546](/cfr/7/51.1546.md).

## Notes

### Amendments

[35 FR 18258, Dec. 1, 1970, as amended at 76 FR 31789, June 2, 2011]

### Source

Source: 35 FR 18258, Dec. 1, 1970, unless otherwise noted. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981.

### Authority

Authority: 7 U.S.C. 1621-1627.

### Amendments

[35 FR 18258, Dec. 1, 1970, as amended at 76 FR 31789, June 2, 2011]