"U.S. No. 1" consists of tangerines which meet the following requirements:
(a) Basic requirements:(1) Discoloration: Not more than one-third of the surface, in the aggregate, may be affected by discoloration. (See § 51.1828 .);(2) Fairly well colored;(3) Firm;(4) Mature; and,(5) Well formed.(b) Free from: (1) Decay;(2) Unhealed skin breaks; and,(3) Wormy fruit.(c) Free from damage caused by: (1) Ammoniation;(2) Bruises;(3) Buckskin;(4) Caked melanose;(5) Creasing;(6) Dirt or other foreign material;(7) Disease;(8) Dryness or mushy condition;(9) Green spots;(10) Hail;(11) Insects;(12) Oil spots;(13) Scab;(14) Scale;(15) Scars;(16) Skin breakdown;(17) Sprayburn;(18) Sunburn; and(19) Other means.(d) For tolerances see § 51.1820 .