Article 55U.K.Duration of the disease control measures in the surveillance zone
1.The competent authority may lift the disease control measures applied in the surveillance zone pursuant to Sections 1 and 3 of this Chapter only if the period set out in Annex XI has elapsed and the following conditions are fulfilled:
(a)the requirements provided for in Article 39 have been met in the protection zone; and
(b)a representative number of establishments keeping animals of listed species have undergone, with favourable results, visits carried out by official veterinarians, in accordance with Article 41.
2.Where the relevant category A disease is transmitted by a listed vector, in accordance with Regulation (EU) 2018/1882, the competent authority may:
(a)set the duration of the measures in the surveillance zone on a case by case basis taking into account factors influencing the risk of spreading the disease; and
(b)provide for the introduction of sentinel animals.