18.—(1) An official veterinary surgeon or an inspector acting under the responsibility of an official veterinary surgeon—
(a)shall be present at any slaughterhouse where any carcase of a sheep or goat that is not marked with a young lamb stamp is being loaded for delivery to an approved cutting premises; and
(b)shall supervise the loading.
(2) An official veterinary surgeon, an authorised officer or an inspector acting under the responsibility of an official veterinary surgeon—
(a)shall be present at any approved cutting premises where any carcase of a sheep or goat that is not marked with a young lamb stamp is being unloaded; and
(b)shall supervise the unloading.
(3) Where any vehicle is loaded as described in paragraph (1), it shall be sealed by an official veterinary surgeon, an authorised officer or an inspector acting under the responsibility of an official veterinary surgeon.
(4) A sealed vehicle, on arrival at any approved cutting premises, shall be unsealed by an official veterinary surgeon, an authorised officer or an inspector acting under the responsibility of an official veterinary surgeon.
(5) A person other than the person mentioned in paragraph (3) or (4) shall not seal any vehicle which has been loaded as described in paragraph (1) or unseal any sealed vehicle.