29In that regard, it must be noted, as did the national court, that Regulation No 2658/87, in the versions applicable to the main proceedings, does not define the notions of ‘parts’ and ‘accessories’ within the meaning of Chapter 90 of the CN. However, the Court, ruling on the scope of those concepts in connection with heading 8473 of the CN for the purpose of classifying ink cartridges for printers, stated that the notion of ‘parts’ implies a whole for the operation of which the part is essential and that the notion of ‘accessories’ implies an interchangeable part designed to adapt a machine for a particular operation, or to increase its range of operations, or to perform a particular service relative to the main function of the machine (see Turbon International, paragraphs 30 and 32).
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