26.—(1) Subject to paragraph (2), administration of any product which is, or which contains, testosterone or progesterone is in accordance with this regulation if it is carried out by a veterinary surgeon for a therapeutic purpose on a farm animal by injection.
(2) Paragraph (1) does not apply to the treatment of ovarian dysfunction, in which case administration is accordance with this regulation if it is carried out by a veterinary surgeon using a product in the form of vaginal spirals.