PART ELifting of demarcation
17. The appropriate UK plant health authority may lift the demarcation that applies to a demarcated area if—
(a)the plant pest is not detected in the demarcated area over the relevant period during official surveys carried pursuant to paragraph 1(d) of Schedule 9 or by the monitoring referred to in paragraph 11(i); or
(b)the conditions in paragraph 15(a) and (b) are satisfied.