“U.S. No. 1” consists of pecans in the shell which meet the following requirements:

(a) Free from loose extraneous or foreign material.

(b) Shells are: (1) Fairly uniform in color; and,

(2) Free from damage by any cause.

(c) Kernels are: (1) Free from damage by any cause.

(d) For tolerances see §51.1404.