9811.00.40.00—Samples of tobacco products, and cigarette papers and tubes (each sample consisting of not more than (a) 3 cigars, (b) 3 cigarettes, (c) 3.5 grams of tobacco, (d) 3.5 grams of snuff, (e) 3 cigarette tubes or (f) 25 cigarette papers) to be used in the United States only for soliciting orders by persons importing tobacco products, cigarette papers or cigarette tubes in commercial quantities