22.—(1) Subject to paragraph (2), any reference in this Order to a function exercisable by the Department shall, in any case where the function is to be exercised in relation to a matter with which the Department of Agriculture is concerned, be exercisable by the Department and that Department acting jointly.
(2) The validity of anything purporting to be done in pursuance of the exercise of any such function shall not be affected by any question whether that thing fell, by virtue of this Article, to be done by the Department and the Department of Agriculture.