With effect from 1st June, 2013 the competent authority under the Serbian NPPO shall be issuing Phytosanitary Certificate and Phytosanitary Certificate for re-export on new forms. Transition period will be till 30th September, 2013. During the transition period, the Phytosanitary Certificate and Phytosanitary Certificate for re-export issued on old forms shall also be valid till 30th September, 2013 and the importing countries are requested to accept the same.