CFR /  Title 7  /  Part 29  /  Sec. 29.1030 Leaf structure.

The cell development of a leaf as indicated by its porosity. (See Elements of Quality Chart.) [42 FR 21092, Apr. 25, 1977. Redesignated at 49 FR 16755, Apr. 20, 1984, and 51 FR 25027, July 10, 1986]