South Dakota Administrative Rules
Title 12 - Department of Agriculture
Article 12:26 - Eggs and egg products
Chapter 12:26:07 - Quality standards for individual eggs
Section 12:26:07:02 - A quality factors

(1) The shell shall be clean, unbroken, and practically normal;

(2) The air cell shall not exceed three-sixteenth inch in depth, may show unlimited movement, and may be free or bubbly;

(3) The white shall be clear and at least reasonably firm so that the yolk outline is only fairly well defined when the egg is twirled before the candling light; and

(4) The yolk shall be practically free from apparent defects.