Any leaf of which 20 percent or more of its surface is yellow, grayish, mottled, or bleached, and does not blend with the normal colors of the type or group and is generally characterized by a lower degree of leaf structure and maturity than tobacco of the corresponding group and quality. (See Rule 15.) [24 FR 8771, Oct. 29, 1959. Redesignated at 47 FR 51722, Nov. 17, 1982, 49 FR 16758, Apr. 20, 1984, and 51 FR 40407, Nov. 7, 1986]