Any lot of tobacco containing 20 percent or more of variegated tobacco other than variegated red or scorched shall be described as variegated and designated by the color symbol ``K,'' ``KL,'' ``KF,'' ``KD,'' or ``KV.'' [42 FR 21092, Apr. 25, 1977, as amended at 48 FR 29671, June 28, 1983]