Opacifying preparations for X-ray examinations;

1.- This Chapter does not cover : (a) Foods or beverages (such as dietetic, diabetic or fortified foods, food supplements, tonic beverages and mineral waters), other than nutritional preparations for intravenous administration (Section IV); (b) Products, such as tablets, chewing gum or patches (transdermal systems), containing nicotine and intended to assist tobacco use cessation (heading 24.04); (c) Plasters specially calcined or finely ground for use in dentistry (heading 25.20); (d) Aqueous distillates or aqueous solutions of essential oils, suitable for medicinal uses (heading 33.01); (e) Preparations of headings 33.03 to 33.07, even if they have therapeutic or prophylactic properties; (f) Soap or other products of heading 34.01 containing added medicaments; (g) Preparations with a basis of plaster for use in dentistry (heading 34.07); (h) Blood albumin not prepared for therapeutic or prophylactic uses (heading 35.02); or (ij) Diagnostic reagents of heading 38.22. 2.- For the purposes of heading 30.02, the expression “immunological products” applies to peptides and proteins (other than goods of heading 29.37) which are directly involved in the regulation of immunological processes, such as monoclonal antibodies (MAB), antibody fragments, antibody conjugates and antibody fragment conjugates, interleukins, interferons (IFN), chemokines and certain tumor necrosis factors (TNF), growth factors (GF), hematopoietins and colony stimulating factors (CSF). 3.- For the purposes of headings 30.03 and 30.04 and of Note 4 (d) to this Chapter, the following are to be treated : (a) As unmixed products : (1) Unmixed products dissolved in water; (2) All goods of Chapter 28 or 29; and (3) Simple vegetable extracts of heading 13.02, merely standardised or dissolved in any solvent; (b) As products which have been mixed : (1) Colloidal solutions and suspensions (other than colloidal sulphur); (2) Vegetable extracts obtained by the treatment of mixtures of vegetable materials; and (3) Salts and concentrates obtained by evaporating natural mineral waters. 4.- Heading 30.06 applies only to the following, which are to be classified in that heading and in no other heading of the Nomenclature : (a) Sterile surgical catgut, similar sterile suture materials (including sterile absorbable surgical or dental yarns) and sterile tissue adhesives for surgical wound closure; (b) Sterile laminaria and sterile laminaria tents; (c) Sterile absorbable surgical or dental haemostatics; sterile surgical or dental adhesion barriers, whether or not absorbable; (d) Opacifying preparations for X-ray examinations and diagnostic reagents designed to be administered to the patient, being unmixed products put up in measured doses or products consisting of two or more ingredients which have been mixed together for such uses; (e) Placebos and blinded (or double-blinded) clinical trial kits for use in recognised clinical trials, put up in measured doses, even if they might contain active medicaments; (f) Dental cements and other dental fillings; bone reconstruction cements; (g) First-aid boxes and kits;