30.—(1) Subject to sub-paragraph (2), in the case of any feeding stuff intended for a particular nutritional purpose which is put into circulation, particular attention may be drawn in the statutory statement, or elsewhere on the package, label or container, to the presence or low content of one or more analytical constituents which are essential aspects of the characteristics of the feeding stuff.
(2) Where particular attention is drawn to the presence or low content of any analytical constituent, as permitted by sub-paragraph (1), the maximum or minimum content, expressed in terms of the percentage by weight of that analytical constituent, must be clearly indicated in the list of analytical constituents.