36.—(1) The Secretary of State may, by declaration, end a protection zone but must not, in the case of a protection zone declared under paragraph (1), (2) or (3) of article 28 do so until—
(a)at least 21 days have elapsed since the completion at all infected premises in the zone of the preliminary cleansing and disinfection measures referred to in Part 2 of Schedule 3; and
(b)a veterinary inquiry has been completed on all premises within the zone identified as containing poultry or other captive birds.
(2) On the ending of any protection zone, the area which formed that protection zone shall become part of the associated surveillance zone.
(3) The Secretary of State may, by declaration, end a surveillance zone but, in the case of a zone declared under paragraphs (1), (2) or (3) of article 28, must not do so until at least 30 days have elapsed since the completion at all infected premises in the zone of the preliminary cleansing and disinfection measures referred to in Part 2 of Schedule 3.