MANUFACTURERS' EXCISE AND IMPORT TAXES 415 SEC. 3424. LUMBER. (a) Lumber, rough, or planed or dressed on one or more sides, except flooring made of maple (except Japanese maple), birch, and beech, $3 per thousand feet, board measure; but the tax on the articles described in this section shall apply only with respect to the importa- tion of such articles. The tax imposed by this subsection shall not apply to lumber of Northern white pine (pinus strobus), Norway pine (pinus resinosa), and Western white spruce. (b) In determining board measure for the purposes of this section no deduction shall be made on account of planing, tonguing, and grooving. As used in this section, the term "lumber" includes sawed timber. This subsection shall apply (1) unless in conflict with any international obligation of the United States or (2) if so in conflict, then on the termination of such obligation otherwise than in connec- tion with the undertaking by the United States of a new obligation which continues such conflict. SEC. 3425. COPPER. Copper-bearing ores and concentrates and articles provided for in paragraph 316, 380, 381, 387, 1620, 1634, 1657, 1658, or 1659 of the Tariff Act of 1930, 4 cents per pound on the copper contained therein: Provided, That no tax under this section shall be imposed on copper in any of the foregoing which is lost in metallurgical processes: Provided further, That ores or concentrates usable as a flux or sulphur reagent in copper smelting and/or converting and having a copper content of not more than 15 per centum, when im- ported for fluxing purposes, shall be admitted free of said tax in an aggregate amount of not to exceed in any one year 15,000 tons of copper content. All articles dutiable under the Tariff Act of 1930, not provided for heretofore in this section, in which copper (includ- ing copper in alloys) is the component material of chief value, 3 cents per pound. All articles dutiable under the Tariff Act of 1930, not provided for heretofore in this section, containing 4 per centum or more of copper by weight, 3 per centum ad valorem or /4 of 1 cent per pound, whichever is the lower. The tax on the articles described in this section shall apply only with respect to the importation of such articles. The Secretary is authorized to prescribe all necessary regulations for the enforcement of the provisions of this section. Part II-Special Administrative Provisions SEC. 3430. APPLICABILITY OF TARIFF PROVISIONS. The tax imposed by section 3420 shall be levied, assessed, col- lected, and paid in the same manner as a duty imposed by the Tariff Act of 1930, 46 Stat. 590, 672 (U. S . C . Title 19, c. 4) and shall be treated for the purposes of all provisions of law relating to the customs revenue as a duty imposed by such Act, except that- (a) the value on which such tax shall be based shall be the sum of (1) the dutiable value (under section 503 of such Act) of the article, plus (2) the customs duties, if any, imposed thereon under any provision of law; (b) for the purposes of section 489 of such Act (relating to additional duties in certain cases of undervaluation) such tax shall not be considered an ad valorem rate of duty or a duty based upon or regulated in any manner by the value of the article, and for the purposes of section 336 of such Act (the so-called flexible tariff provision) such tax shall not be considered a duty; (c) no drawback of such tax (except tax paid upon the importa- tion of an article described in sections 3422, 3423, 3424, and 3425) shall be allowed under section 313 (a), (b), or (f) of the Tariff Act of 1930 or any provision of law allowing a drawback of customs duties
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