Classification of activated bleaching earth shifted to activated clays heading, requiring reclassification and recovery of short levies. Activated bleaching earth / activated clay, produced by acid or alkali activation of bentonite and possessing distinct adsorptive and catalytic properties, is excluded from natural clay headings by HS Explanatory Notes and is classifiable as CTH 3802.90 (activated bleaching earth). Customs authorities are directed to reclassify imports accordingly and to issue demand notices where misdeclaration has caused short levy.