Manner of marking or labelling: general requirement
4. When any food other than food to which regulation 5 applies is sold, any particulars with which it is required to be marked or labelled by Regulation 1139/98 or Regulation 50/2000 shall appear—
(a)on the packaging,
(b)on a label attached to the packaging, or
(c)on a label which is clearly visible through the packaging,
save that where the sale is otherwise than to the final consumer, such particulars may, alternatively, appear only on the commercial documents relating to the food where it can be guaranteed that such documents, containing all such particulars, either accompany the food to which they relate or were sent before, or at the same time as, delivery of the food.