In the event of a change in the classification or maximum residue limit of a pharmacologically active substance in application of Regulation (EC) No 470/2009 of the European Parliament and of the Council of 6 May 2009 laying down Community procedures for the establishment of residue limits of pharmacologically active substances in foodstuffs of animal origin, the marketing authorisation holder shall apply, if necessary, for the amendment of this authorisation, after publication in the Official Journal of the European Union of the change in the classification or maximum residue limit. Failing this, the Director General of the Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail shall take all necessary measures to amend the marketing authorisation or withdraw it within sixty days of this publication.