Where necessary, it may be decided in accordance with the regulatory procedure referred to in Article 21(2):
(a)((a)) whether or not a given substance or mixture of substances, material or type of food falls within the categories listed in Article 2(1);
(b)((b)) to which specific category, defined in Article 3(2)(b) to (j), a given substance belongs;
(c)((c)) whether or not a particular product belongs to a food category or is a food referred to in Annex I or Annex III, Part B.