10.—(1) Subject to paragraph (3), when a horse for which a horse passport has been issued is sold, the seller shall, within 28 days of the sale, send the horse passport to the recognised organisation which issued it with details of the new owner, and the recognised organisation shall endorse the passport with the details of the new ownership and re-issue the passport to the new owner.
(2) Where a horse referred to in paragraph (1) is registered with more than one recognised organisation, the seller shall, in addition to complying with the requirements of that paragraph, within 28 days of the sale of the horse, send details of the new owner of the horse to each recognised organisation (other than the organisation which issued the horse passport for the horse) with which the horse is registered.
(3) Where a horse referred to in paragraph (1) is no longer registered with the recognised organisation which issued the passport for that horse, the seller shall, within 28 days of the sale or such longer period as is practicable in the circumstances, send the horse passport with details of the new owner to all of the recognised organisations with which the horse is still registered.