12.—(1) This article applies to a breeding herd where—
(a)the collective BVD status of the breeding herd is not negative in accordance with article 27(2), and
(b)there has been no change to the collective BVD status of the herd for a period of 15 consecutive months.
(2) This article ceases to apply on the earlier of—
(a)the date that every animal in the herd has an individual BVD status of negative, or
(b)the date that an approved veterinary surgeon has notified the Scottish Ministers of a change of the collective BVD status of the breeding herd from not negative to negative under article 30.
(3) Where this article applies, the keeper must, within the period of 13 months starting on the date on which this article first applies, take from each bovine animal in the herd which has no individual BVD status—
(a)an ear tag sample of tissue taken in accordance with article 14, or
(b)a sample of blood.