The substances specified in the Annex which were authorised by Implementing Regulation (EU) No 601/2013 and feed containing them, which are produced and labelled before 4 September 2014 in accordance with the rules applicable before 4 March 2014 may continue to be placed on the market and used until the existing stocks are exhausted. As regards feed intended for pet animals, the time period for production and labelling referred to in the first sentence shall end on 4 March 2016.