Division 2 The requirements in relation to surveillance and control measures of quarantine establishments for aquaculture animals, as referred to in point (b) of Article 15, shall be the following:

environmental conditions which are conducive to the clinical expression of the relevant listed or emerging disease must be kept in the quarantine establishment throughout the entire quarantine period;

all aquaculture animals that die or show symptoms of disease during the quarantine period must be clinically inspected by a veterinarian and testing of samples must be carried out at a laboratory designated by the competent authority for that purpose;

fish, molluscs and crustaceans of listed species must be quarantined under the conditions set out in point (a) for a period of at least 90 days;

within a period of 15 days from the date of expiry of the quarantine period, samples must be taken from a number of aquaculture animals that will ensure the detection of the relevant pathogen with a 95 % confidence if the target prevalence is 2 %. These aquaculture animals may be taken from the cohort which is undergoing quarantine or from co-habiting sentinel aquaculture animals which are susceptible to the relevant listed or emerging disease and which are used as a diagnostic aid during the quarantine period.