010-15 Wyo. Code R. § 15-8
(a) A "clean" shell is an unbroken shell free from foreign material and stains or discolorations that are readily visible. An egg may be considered clean if it has only very small specks, stains or cage marks, if such specks, stains or cage marks are not of sufficient number or intensity to detract from the generally clean appearance of the egg. Eggs which show traces of processing oil on the shell are considered clean unless otherwise soiled.
(b) A "dirty" shell is an unbroken shell which has dirt or foreign material adhering to its surface, has prominent stains, or has moderate stains covering more than 1/32 of the shell surface if localized or 1/16 of the shell surface if scattered.
(c) A "check egg" is an egg with a broken shell or crack in the shell, but with its shell membranes intact and its contents not leaking. A check egg is considered to be lower quality than a dirty egg.
(d) A "practically normal" (AA or A quality) shell is an unbroken shell that approximates the usual egg shape and is sound and free from thin spots. Ridges and rough areas that do not materially affect the shape and strength of the shell are permitted.
(e) An "abnormal" (B quality) shell is an unbroken shell that is somewhat unusual, decidedly misshapen, faulty in soundness or strength, or shows pronounced ridges or thin spots.
010-15 Wyo. Code R. § 15-8