1.
1. This Chapter does not cover: • (a) Animal blood of heading 05.11; • (b) Separate chemically defined compounds (other than those answering to the descriptions in Note 2 (a), 3 (a), 4 (a) or 5 below); or • (c) Cultured potassium chloride crystals (other than optical elements) weighing not less than 2.5 g each, of heading 38.24; optical elements of potassium chloride (heading 90.01).
2.
2. Heading 31.02 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 31.05: • (a) Goods which answer to one or other of the descriptions given below: (i) Sodium nitrate, whether or not pure; (ii) Ammonium nitrate, whether or not pure; (iii) Double salts, whether or not pure, of ammonium sulphate and ammonium nitrate; (iv) Ammonium sulphate, whether or not pure; (v) Double salts (whether or not pure) or mixtures of calcium...
3.
3. Heading 31.03 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 31.05: • (a) Goods which answer to one or other of the descriptions given below: (i) Basic slag; (ii) Natural phosphates of heading 25.10, calcined or further heat-treated than for the removal of impurities; (iii) Superphosphates (single, double or triple); (iv) Calcium hydrogenorthophosphate containing not less than 0.2% by weight of fluorine calculated on...
4.
4. Heading 31.04 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 31.05: • (a) Goods which answer to one or other of the descriptions given below: (i) Crude natural potassium salts (for example, carnallite, kainite and sylvite); (ii) Potassium chloride, whether or not pure, except as provided in Note 1 (c) above; (iii) Potassium sulphate, whether or not pure; (iv) Magnesium potassium sulphate, whether or not pure. • (b)...
5.
5. Ammonium dihydrogenorthophosphate (monoammonium phosphate) and diammonium hydrogenorthophosphate (diammonium phosphate), whether or not pure, and intermixtures thereof, are to be classified in heading 31.05.
6.
6. For the purpose of heading 31.05, the term "other fertilizers" applies only to products of a kind used as fertilizers and containing, as an essential constituent, at least one of the fertilizing elements nitrogen, phosphorus or potassium.
