30.31—Classification of leaf tobacco.
         For the purpose of this classification leaf tobacco shall be divided into the following classes:
 
    
    Class 1.Flue-cured types.
        Class 2.Fire-cured types.
        Class 3.1 Air-cured types.
        Class 4.Cigar-filler types.
        Class 5.Cigar-binder types.
        Class 6.Cigar-wrapper types.
        Class 7.Miscellaneous domestic types.
        Class 8.Foreign-grown cigar-leaf types.
        Class 9.Foreign-grown types, other than cigar types.