1.The responsible official bodies of the Member State shall define what constitutes a field for the purposes of this Directive in order to ensure that phytosanitary conditions within a field are homogeneous as regards the risk of potato cyst nematodes. In doing so, they shall take into account sound scientific and statistical principles, the biology of the potato cyst nematode, the cultivation of the field and the particular production systems of the host plants of potato cyst nematodes in that Member State. The detailed criteria for the definition of a field shall be officially notified to the Commission and to the other Member States.
2.Further provisions related to the criteria for the definition of a field may be adopted in accordance with the procedure referred to in Article 17(2).