Vendar pa smejo države članice po postopku iz člena 26 med čakanjem na rezultate ponovnega pregleda, predvidenega v členu 28, zahtevati omejitev veljavnosti zgornjega odstavka, zlasti za preprečitev tega, da bi se v odobreno cono vnašale ribe, mehkužci ali raki iz zgornjega odstavka, ki prihajajo iz odobrene gojilnice v coni brez statusa, pod pogojem, da v gojilnici ni nobenih rib, mehkužcev ali rakov, ki spadajo med dovzetne vrste, navedene v Prilogi A, stolpcu 2, seznamu I in II in da gojilnica nima stika z vodotokom ali z obalnimi vodami ali z vodami rečnega ustja.
However, pending the outcome of the review provided for in Article 28, Member States may, under the procedure laid down in Article 26, request a derogation from the preceding subparagraph, in particular so as to prohibit the introduction into an approved zone of fish, molluscs or crustaceans referred to in this paragraph, originating from an approved farm in a non-approved zone or from a farm which may be situated in a non-approved zone on condition that such a farm contains no fish, molluscs or crustaceans belonging to the susceptible species referred to in Annex A, column 2 of lists I and II and is not connected with a watercourse or with coastal or estuarial waters.