Is note 2(a) to Section XVI 1 to be interpreted as meaning that goods that fulfil the conditions both for classification as a part within the meaning of heading 8473 of the Combined Nomenclature (CN) and for classification as individual goods under another heading of Chapter 84 of the CN or a heading of Chapter 85 of the CN are to be classified under the other heading because heading 8473 of the CN does not take precedence over the other headings of Chapter 84 and the headings of Chapter 85 of the CN?