29.—(1) A protection zone declared under paragraphs (1), (2) or (3) of article 28 must—
(a)be centred on the part of the infected premises which the Secretary of State considers most appropriate, given the nature of the outbreak; and
(b)have a radius of at least 3 kilometres.
(2) A surveillance zone declared under paragraphs (1), (2) or (3) of article 28 must—
(a)be centred on the part of the infected premises which the Secretary of State considers most appropriate, given the nature of the outbreak; and
(b)have a radius of at least 10 kilometres.
(3) A restricted zone must—
(a)either
(i)be centred on the part of the infected premises which the Secretary of State considers most appropriate, given the nature of the outbreak; or
(ii)be adjacent to the surveillance zone or to another restricted zone; and
(b)be of such size as the Secretary of State considers necessary.
(4) The Secretary of State must take account of the criteria set out in paragraph (5) when deciding—
(a)what size zones to declare under paragraphs (1), (2) and (3) of article 28; and
(b)whether to declare restricted zones under paragraph (5) of article 28.
(5) The criteria referred to in paragraph (4) are—
(a)the results of veterinary inquiries;
(b)the geographical features of the area around the infected premises;
(c)the location and proximity of other premises containing poultry and other captive birds in the area;
(d)patterns of movement of and trade in poultry and other captive birds in the area;
(e)the facilities and personnel available to control movements within the zone (including any movement of poultry or other captive birds off premises for slaughter and disposal).
(6) Protection zones and surveillance zones declared under paragraph (4) of article 28 must be centred on the part of the premises which the Secretary of State considers most appropriate, given the nature of the outbreak, and must be of such size as she considers necessary to reduce the risk of the spread of avian influenza.