Serious damage.

CFR · 2024-01-01 · US · Title 7

(a) Any plainly visible mold; (b) Rancidity when the kernel is distinctly rancid to the taste. Staleness of flavor shall not be classed as rancidity; (c) Decay affecting any portion of the kernel; (d) Insects, web, or frass or any distinct evidence of insect feeding on the kernel; (e) Internal discoloration which is dark gray, dark brown, or black and extends more than one-third the length of the half-kernel or piece; (f) Adhering material from inside the shell when attached to more than one-half of the surface on one side of the half-kernel or piece; (g) Dark kernel spots when more than three are on the kernel, or when (h) Dark skin discoloration, darker than “dark brown,” when covering more than one-fourth of the surface of the half-kernel or piece; and, (i) Undeveloped kernel. (See Figure 1.)

official document · source cfr-2024 · id 7:§ 51.1450