37.—(1) Subject to paragraph (3), no person shall mix a zootechnical additive with an additive which is not a zootechnical additive in a premixture or feedingstuff unless the mixing of the additives is permitted in accordance with the provisions contained in Article 6.2 of the Additives Directive.
(2) Subject to paragraph (3), no person shall mix a zootechnical additive with another zootechnical additive in a premixture or feedingstuff unless the mixing of the additives—
(a)is permitted in accordance with the provisions contained in Article 6.2 of the Additives Directive, and
(b)does not contravene the provisions contained in Article 6.3 of the Additives Directive.
(3) Nothing in paragraphs (1) or (2) shall prohibit a person from mixing a zootechnical additive with another zootechnical additive, or any other additive, where it is intended that—
(a)the resulting mixture of additives, or
(b)a premixture or feedingstuff containing the mixture of additives, will be fed to an animal for an Article 6.4 purpose, and the use of the mixture of additives, or the premixture or the feedingstuff containing the mixture, as the case may be, will constitute—
(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 that authorises the procedure.