1 . COMMON CUSTOMS TARIFF - INTERPRETATION - PRODUCTS COMING WITHIN TARIFF SUBHEADING 78.01 B ( LEAD WASTE AND SCRAP ) - EXEMPTION FROM THE CUSTOMS TARIFF - DUTY-FREE IMPORTATION - CONDITION 2 . COMMON CUSTOMS TARIFF - INTERPRETATION - CLASSIFICATION OF GOODS - MELTING OF LEAD SCRAP - BARS FOR TYPE-CASTING MACHINES - CLASSIFICATION UNDER TARIFF SUBHEADING 78.01 A ( UNWROUGHT LEAD )