Where based on the results of the surveys referred to in Article 4(1) or other evidence, a Member State finds the specified organism to be present in a field or watercourse in its territory where its presence was previously unknown, that Member State shall without delay establish, or where appropriate amend, a demarcated area consisting of an infested zone and a buffer zone, as set out in Section 1 of Annex II.

In the demarcated area it shall take all measures necessary for the eradication of the specified organism. These measures shall include the measures set out in Section 2 of Annex II.

Where a demarcated area is to be established or amended in accordance with paragraph 1, the Member State concerned shall, where appropriate, set up or amend an awareness raising programme.

Where, as regards a demarcated area, based on the surveys referred to in Article 4(1), the specified organism has not been found to be present for a period of four consecutive years, the Member State concerned shall confirm that that organism is no longer present in that area and that the area ceases to be demarcated.

Where a Member State takes measures in accordance with paragraphs 1, 2 and 3, it shall immediately notify to the Commission and the other Member States the list of demarcated areas, information on their delimitation, including maps showing their location, and a description of the measures applied in those demarcated areas.