Article 18U.K.Census and visits by the official veterinarian and surveillance
The competent authority shall ensure that the following measures are applied in protection zones:
a census of all the holdings is made as soon as possible;
all commercial holdings are visited by an official veterinarian as soon as possible for a clinical examination of the poultry and other captive birds and, if necessary, the collection of samples for laboratory tests in accordance with the diagnostic manual; a record of such visits and the findings thereof shall be kept; non-commercial holdings are visited by an official veterinarian before the lifting of the protection zone;
additional surveillance is immediately implemented in accordance with the diagnostic manual in order to identify any further spread of avian influenza in the holdings located in the protection zone.