Natrolite-phonolite", belonging to the group "Binders, anti-caking agents and coagulants", shall be authorized in accordance with Directive 70/524/EC as additive, E 566, in feedingstuffs under the conditions laid down in Annex I to this Regulation and "Clinoptilolite of volcanic origin", may be authorized as additive, No. 3, in feedingstuffs under the conditions laid down in Annex II to this Regulation. (3 articles and 1 Annex)