37.—(1) The Secretary of State may, where she is satisfied that the conditions in paragraph (2) are met, amend the declaration creating a protection zone so that the area within its boundaries becomes part of the surveillance zone centred on the same premises.
(2) The conditions for amendment of a declaration creating a protection zone are—
(a)at least 15 days have elapsed since the completion of any preliminary cleansing and disinfection in that protection zone; and
(b)a survey of all susceptible animals to substantiate the absence of infection has been carried out on behalf of the Secretary of State in that protection zone with negative results.
(3) The Secretary of State may, where she is satisfied that the conditions in paragraph (4) are met, revoke the declaration creating a surveillance zone.
(4) The conditions for revocation of a declaration creating a surveillance zone are—
(a)at least 30 days have elapsed since completion of any preliminary cleansing and disinfection in the area within the boundaries of that surveillance zone; and
(b)if the declaration creating that surveillance zone also created a protection zone centred on the same premises, it has previously been amended so that the protection zone has become part of the surveillance zone;
(c)if the declaration creating that surveillance zone did not create a protection zone centred on the same premises, any zone in Scotland or Wales having equivalent effect to a protection zone and centred on the same premises as that surveillance zone is no longer in effect; and
(d)a survey of susceptible animals to substantiate the absence of infection has been carried out in that surveillance zone since that amendment on behalf of the Secretary of State with negative results.
(5) An amendment or revocation under this article shall refer to the declaration creating the protection zone and surveillance zone and specify the date and time the amendment or revocation is to take effect.
(6) In this article “preliminary cleansing and disinfection” means cleansing and disinfection undertaken in accordance with paragraphs 12 and 13 of Schedule 3, as required by article 28 or 29, and ending 24 hours after the application of disinfectant.