Chapter 9 - NOTES l. Mixtures of the products of headings Nos 09.04 to 09.10 are to be classified as follows: (a) Mixtures of two or more of the products of the same heading are to be classified in that heading; (b) Mixtures of two or more of the products of different heading are to be classified under heading No. 09.10. The addition of other substances to the products of headings Nos. 09.04 to 09.10 (or to the mixtures referred to in paragraph (a) or (b) above) shall not affect their classification provided that the resulting mixtures retain the essential character of the goods falling in those headings. Otherwise such mixtures are not classified in this Chapter; those constituting mixed condiments or mixed seasonings are classified in heading No. 21.03. 2. This Chapter does not cover Cubeb pepper (Piper cubeba) and other products of heading No. 12.11.