3.—(1) Subject to paragraph (2), a person shall not sell, for administration to any animal, any product which is, or which contains, a list A substance or a list B substance, if the animal or any product of that animal is intended for human consumption.
(2) Paragraph (1) shall not apply to the sale of a product that complies with the requirements of regulation 25 and which is for administration in accordance with regulation 27.
(3) Any product sold which is, or which contains, a list A substance or a list B substance shall be presumed, unless the contrary is proven, to have been sold for administration to an animal which is, or any product of which is, intended for human consumption.