50.—(1) Subject to paragraph (2), no person shall use a zootechnical premixture for the purpose of animal feeding unless the premixture is incorporated in a compound feedingstuff and was incorporated in the feedingstuff in accordance with regulation 51.
(2) Nothing in paragraph (1) shall prohibit a person from feeding an animal—
(a)a zootechnical premixture that has not been incorporated in a compound feedingstuff, or
(b)a feedingstuff containing a zootechnical premixture that was not incorporated in the feedingstuff in accordance with regulation 51
for an Article 6.4 purpose if the use of the premixture or the feedingstuff, as the case may be, constitutes—
(i)a medicinal test on animals for which he has been issued with an animal test certificate, or
(ii)a regulated procedure for which he holds a personal licence, and which is specified in a project licence which authorises the procedure.