The Tariff Act of 1930, referred to in subsec. (b), is act June 17, 1930, ch. 497, 46 Stat. 590. Title VII of the Act is classified generally to subtitle IV (§ 1671 et seq.) of chapter 4 of Title 19, Customs Duties. For complete classification of this Act to the Code, see section 1654 of Title 19 and Tables.