1. The net quantity of a food shall be expressed using litres, centilitres, millilitres, kilograms or grams, as appropriate:
(a)
in units of volume in the case of liquid products;
(b)
in units of mass in the case of other products.
2. In order to ensure a better understanding by the consumer of the food information on the labelling, the Commission may establish for certain specified foods, by means of delegated acts, in accordance with Article 51, a manner for the expression of the net quantity other than the one laid down in paragraph 1 of this Article.
3. Technical rules for applying paragraph 1, including specific cases where the indication of the net quantity shall not be required, are laid down in Annex IX.