1.Member States shall ensure that, in addition to the measures referred to in Article 6, the competent authority demarcates a protection zone and a surveillance zone. Demarcation of the zones must take account of geographical, administrative, ecological and epizootiological factors connected with bluetongue and of the control arrangements.
2.(a)The protection zone shall consist of a part of the Community territory having a radius of at least 100 kilometres around the infected holding.
[F1(b) The surveillance zone shall consist of a part of the Union territory with a depth of at least 50 kilometres extending beyond the limits of the protection zone and in which no vaccination against bluetongue with live attenuated vaccines has been carried out during the previous 12 months.]
(c)Where the zones are located on the territory of more than one Member State, the competent authorities of the Member States concerned shall cooperate for the purpose of demarcating the zones referred to in subparagraphs (a) and (b).
(d)However, the protection and surveillance zones shall if necessary be demarcated according to the procedure laid down in Article 20(2).
3.On receipt of a duly substantiated request from a Member State, a decision may be taken, in accordance with the procedure laid down in Article 20(2), to change the demarcation of the zones defined in paragraph 2, in the light of:
(a)their geographical location and ecological factors;
(b)meteorological conditions;
(c)the presence and distribution of the vector;
(d)the results of epizootiological studies carried out pursuant to Article 7;
(e)the results of laboratory tests;
(f)the application of countermeasures, in particular disinsectisation.