Estimated duties shall be taken on raw sugar, as defined in Subheading Note 1 to Chapter 17, Harmonized Tariff Schedule of the United States, on the basis of not less than 96° polariscopic test unless the invoice shows that the sugar is of a lower grade than that of the ordinary commercial shipment.

[T.D. 73-175, 38 FR 17470, July 2, 1973, as amended by T.D. 89-1, 53 FR 51268, Dec. 21, 1988]