The following are general definitions for the purposes of this subpart:

(a) Clean kg. ‘Clean kg’ means kilograms of clean yield as defined in paragraph (b) of this section.

(b) Clean yield. Except for the purposes of carbonized fibers, “Clean yield” means the absolute clean content (that is, all that portion of the merchandise which consists exclusively of wool or hair free of all vegetable and other foreign material, containing by weight 12 percent of moisture and 1.5 percent of material removable from the wool or hair by extraction with alcohol, and having an ash content of not over 0.5 percent by weight), less an allowance, equal by weight to 0.5 percent of the absolute clean content plus 60 percent of the vegetable matter present, but not exceeding 15 percent by weight of the absolute clean content, for wool or hair that would ordinarily be lost during commercial cleaning operations.

(c) For the purposes of carbonized fibers, the term clean yield means the condition as entered.

(d) Sampling unit. “Sampling unit” means all the similar packages covered by one entry or withdrawal containing wool or hair of the same kind or same general condition and character, produced in the same country, packed in substantially the same manner, and entered as or found to be subject to the same rate of entry.

(e) General sample. “General sample” means the composite of the individual portions of wool or hair drawn from a sampling unit.

Invoices of wool or hair subject to duty at a rate per clean kilogram under Chapter 51, Harmonized Tariff Schedule of the United States (19 U.S.C. 1202), shall show the following detailed information in addition to other information required:

(a) Condition, that is, whether in the grease, washed, pulled, on the skin, scoured, carbonized, burr-picked, willowed, handshaken, or beaten;

(b) Whether free of vegetable matter, practically free, slightly burry, medium burry, heavy burry;

(c) Whether in the fleece, skirted, matchings, or sorted;

(d) Length, that is, whether super combing, ordinary combing, clothing, or filling;

(e) Country of origin, and, if possible, the province, section, or locality of production;

(f) If wool, the type symbol by which it is bought and sold in the country of origin and the grade of each lot covered by the invoice, specifying the standard or basis used, that is, whether U.S. Official Standards or the commercial terms to designate grade in the country of shipment; and

(g) Net weight of each lot of wool or hair covered by the invoice in the condition in which it is shipped, and the shipper's estimate of the clean yield of each lot by weight or by percentage.

Each entry summary covering wool or hair subject to duty at a rate per clean kilogram under Chapter 51, Harmonized Tariff Schedule of the United States (19 U.S.C. 1202), shall show as to each lot of wool or hair covered thereby, in addition to other information required, the total estimated or actual net weight of the wool or hair in its condition as imported, its total estimated clean yield in kilograms, and the estimated percentage clean yield. (19 U.S.C. 1484.)

One extra copy of the entry summary covering wool or hair subject to duty at a rate per clean kilogram shall be filed in addition to the copies otherwise required.

Duties on wool or hair subject to duty at a rate per clean kilogram may be estimated at the time of filing the entry summary on the basis of the clean yield shown on the entry summary if the Center director is satisfied that the revenue will be properly protected. Liquidated duties shall be based upon the Center director's final determination of clean yield. Estimated and liquidated duties on wool or hair tested for clean yield pursuant to the provisions of § 151.71, and withdrawn for consumption without a change in condition which affects the duties and in a quantity less than an entire sampling unit shall be determined on the basis of an appropriate adjustment of the estimated percentage clean yield shown on the entry summary for the wool or hair included in each of the lots covered by the withdrawal. This adjustment shall be made by increasing or decreasing such estimated percentage clean yield of each lot by the difference between the percentage clean yield of the related sampling unit, as determined by the Center director, and the weighted average percentage clean yield for the sampling unit, as computed from the estimated percentages clean yield and net weights shown on the entry summary for the lots included in the sampling unit.

Duty shall be assessed and collected on samples taken pursuant to any provision in this subpart, whether taken by the importer or by Customs, unless an exemption or remission is obtained by compliance with an applicable provision of the law or regulations. The duty shall be assessed upon the samples in accordance with their condition at the time of importation, except in the case of merchandise manipulated in warehouse pursuant to section 562, Tariff Act of 1930, as amended (19 U.S.C. 1562). The collection of duty on the samples may be postponed when the importation concerned is not entered for consumption until the withdrawal of the merchandise from which the samples are taken, or until an application for the destruction or abandonment of such merchandise has been accepted pursuant to an appropriate provision of the law or regulations.

The importer may be permitted after entry to draw samples under Customs supervision in reasonable quantities from the packages of wool or hair designated for examination, provided the bales or bags are properly repacked and repaired by him. Any samples so withdrawn shall be weighed and a record showing the quantities thereof shall be made and filed with the related entry.

The following shall be weighed, sampled, and tested for clean yield, unless such sampling or testing is not feasible:

(a) All importation of wool or hair subject to duty at a rate per clean kilogram, except importations entered directly for manipulation under the provisions of section 562, Tariff Act of 1930, as amended (19 U.S.C. 1562), or for manufacture under the provisions of section 311, Tariff Act of 1930, as amended (19 U.S.C. 1311);

(b) All imported wool or hair manipulated under the provisions of section 562, Tariff Act of 1930, as amended (19 U.S.C. 1562) and dutiable after manipulation as wool or hair at a rate per clean kilogram; and

(c) Such other imported wool or hair as an authorized CBP official may designate.

(a) Transfer of right to withdraw. When an original sampling unit has been weighed, sampled, and tested in accordance with this subpart and a part of such unit is covered by a transfer of the right to withdraw made pursuant to section 557, Tariff Act of 1930, as amended (19 U.S.C. 1557), the percentages clean yield of the part covered by the transfer and of the part not so covered shall be computed on the basis of the original Customs weights and test and the invoice data related to the respective parts.

(b) Exportation. When part of such an original sampling unit is exported from continuous Customs custody without having been manipulated as provided for in section 562, Tariff Act of 1930, as amended (19 U.S.C. 1562), the percentage clean yield of the part not exported shall be determined, at the discretion of the Center director, either on the basis of a new determination by reweighing, resampling, and retesting, or by a computation as described in paragraph (a) of this section, for either the exported or the remaining part.

A general sample shall be taken from each sampling unit, unless it is not feasible to obtain a representative general sample of the wool or hair in a sampling unit or to test such a sample in accordance with the provisions of § 151.71. At the request of the importer, two general samples may be taken from a sampling unit if the taking and testing of a second general sample is feasible. If two general samples are taken, one general sample shall be held for use in making a second test for clean yield if such a test is requested in accordance with the provisions of § 151.71(c), or if a second test is found desirable by the Center director or the chief chemist.

(a) Test and report by Customs laboratory. The clean yield of all general samples taken in accordance with § 151.70 shall be determined by test in a Customs laboratory, unless it is found that it is not feasible to test such a sample and obtain a proper finding of percentage clean yield. A report of the percentage clean yield of each general sample as established by the test, or a statement of the reason for not testing a general sample, shall be forwarded to the Center director.

(b) Notification to importer. Where samples of wool or hair have been tested in a Customs laboratory and the Center director has received a copy of the Laboratory Report, Customs Form 6415, the Center director shall promptly provide notice of the test results by mailing a copy of that report to the importer.

(c) Importer's request for retest. If the importer is dissatisfied with the port director's or Center director's finding of clean yield, made before January 19, 2017, or the Center director's finding of clean yield made on or after January 19, 2017, he may file with CBP, either at the port of entry or electronically, a written request in duplicate for another laboratory test for percentage clean yield. Such request shall be filed within 14 calendar days after the date of mailing of the notice of the port director's or Center director's finding of clean yield. The request shall be granted if it appears to the Center director to be made in good faith and if a second general sample as provided for in § 151.70 is available for testing, or if all packages or, in the opinion of the Commissioner of Customs, an adequate number of the packages represented by the general sample are available and in their original imported condition.

(d) Retest procedures. The second test shall be made upon the second general sample, if such a sample is available. If the second general sample is not available, the packages shall be reweighed, resampled, and tested in accordance with the provisions of this section. All costs and expenses of such operations, exclusive of the compensation of Customs officers, shall be borne by the importer, who may be present during such resampling and testing.

(e) Request for commercial test. If the importer is dissatisfied with the results of the second laboratory test, or if a second laboratory test is not feasible, the wool or hair may be retested by a commercial laboratory in accordance with § 151.73.

(a) Conditions for commercial test. If the importer is dissatisfied with the results of a retest made in accordance with § 151.71(c), he may request that a commercial test be made to determine the percentage clean yield of the wool or hair.

(b) Time for filing request. The importer's request shall be filed in writing with the Center director within 14 calendar days after the date of mailing of the notice of the port director's or Center director's findings based on the retest mailed before January 19, 2017, or within 14 calendar days after the date of mailing of the notice of the Center director's findings based on the retest mailed on or after January 19, 2017.

(c) Procedures for commercial test. The Center director shall cause a representative quantity of the wool or hair in dispute to be selected and tested by a commercial method approved by the Commissioner of Customs. The yield, as determined by such commercial test, shall be suitably adjusted to coincide with the definition of clean yield in § 151.61(b). Such test shall be made under the supervision and direction of the Center director at an establishment approved by him, and the expense thereof, including the actual expense of travel and subsistence of Customs officers but not their compensation, shall be paid by the importer.

If the Center director is not satisfied with the results of any test provided for in § 151.71 or § 151.73, he may, within 14 calendar days after receiving the report of the results of such test, proceed to have another test made upon a suitable sample of the wool or hair at the expense of the Government. When the Center director is proceeding to have another test made, he shall, within the 14-day period specified in this paragraph, notify the importer by mail of that fact.

The Center director shall base his final determination of clean yield upon a consideration of all the tests made in connection with the wool or hair concerned.

(a) Examination for grade. The Center director shall cause wool dutiable at a rate per clean kilogram to be examined for grade. The standards for determining grades of wool shall be those which are established from time to time by the Secretary of Agriculture pursuant to law and which are in effect on the date of importation of the wool, as provided by Chapter 51, Additional U.S. Note 2, Harmonized Tariff Schedule of the United States (19 U.S.C. 1202).

(b) Notification to importer. If classification of the wool at the grade or grades determined on the basis of the examination will result in the assessment of duty at a rate higher than the rate provided for wool of the grade stated in the entry, the Center director shall promptly notify the importer by mail.

(c) Importer's request for reexamination. If the importer is dissatisfied with the port director's or Center director's findings as to the grade or grades of the wool, made before January 19, 2017, or the Center director's findings as to the grade or grades of wool made on or after January 19, 2017, he may, within 14 calendar days after the date of mailing of the notice of the port director's or Center director's findings, file in duplicate a written request with the Center director for another determination of grade or grades, stating the reason for the request. Notice of the Center director's findings on the basis of the reexamination of the wool shall be mailed to the importer.