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1.Once the diagnosis of one of the diseases in question has been officially confirmed, Member States shall ensure that the competent authority establishes around the infected holding a protection zone with a minimum radius of three kilometres, itself contained in a surveillance zone with a minimum radius of 10 kilometres. The establishment of the zones must take account of geographical, administrative, ecological and epizootiological factors relating to the disease in question, and of monitoring facilities.
2.Where the zones are situated in the territory of more than one Member State, the competent authorities of the Member States concerned shall cooperate in establishing the zones referred to in paragraph 1. However, if necessary, the protection zone and the surveillance zone shall be established under the procedure provided for in Article 26.
3.At the duly substantiated request of a Member State or on the Commission's initiative, it may be decided under the procedure laid down in Article 26, to modify (in particular to reduce or increase, as appropriate) the boundaries of the zones laid down in paragraph 1 or the duration of the restriction measures, taking into account:
their geographical situation and ecological factors,
the meteorological conditions,
the presence, distribution and type of vectors,
the results of the epizootiological studies carried out in accordance with Article 8,
the results of laboratory tests,
control measures actually applied.