TARIFF SCHEDULES OF THE UNITED STATES General Headnotes and Rules of Interpretation 14
the date of Importation, of articles of that class or kind to which the imported articles belong, and the controlling use is the chief use, i.e., the use which exceeds all other uses (if any) combined; ( I D a tariff classification controlled by the actual use to which an imported article Is put in the United States is satisfied only if such use is Intended at the time of Importation, the article Is so used, and proof thereof Is furnished within 3 years after the date the article is entered; (fl an article Is In chief value of a material If such material exceeds in value each other single component material of the article; (g) a headnote provision which enumerates articles not included in a schedule, part, or subpart Is not necessarily exhaustive, and the absence of a particular article from such headnote provision shall not be given weight in determining the relative specificity of competing provisions which descrlba such article; (h) unless the context requires otherwise, a tariff description for an article covers such article, whether assembled or not assembled, and whether finished or not finished; (IJ) a provision for "parts" of an article covers a product solely or chiefly used as a part of such article, but does not prevail over a specific provision for such part. II. Issuance of Rules and Regulations. The Secretary of the Treasury is hereby authorized to issue rules and regulations governing the admission of articles under the provisions of the schedules. The allowance of an Importer's claim for classification, under any of the provisions of the schedules which provide for total or partial relief from duty or other import restrictions on the basis of facts which are not determinable from an examination of the article itself in its condition as imported, is dependent upon his complying with any rules or regulations which may be Issued pursuant to this headnote, 12. The Secretary of the Treasury is authorized to prescribe methods of analyzing, testing, sampling, weighing, gauging, measuring, or other methods of ascertainment whenever he finds that such methods are necessary to determine the physical, chemical, or other properties or characteristics of articles for purposes of any law administered by the Customs Service.
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