Where an order is made by virtue of paragraph 6 of this Schedule prohibiting or restricting the sale, supply or administration in, or the importation into, Northern Ireland of veterinary drugs of any description or class or any particular veterinary drugs or animal feeding stuffs in which medicinal products of any description or class have been incorporated or any particular animal feeding stuffs in which medicinal products have been incorporated, the order may also contain provisions for prohibiting (subject to such exceptions as may be provided for by or under the order) any person from landing in Northern Ireland or having in his possession in Northern Ireland any veterinary drug, or animal feeding stuffs containing medicinal products, of that description or class or, as the case may require, any such particular veterinary drugs or animal feeding stuffs.