The competent authority shall ensure that audits are carried out periodically of holdings officially recognised as applying controlled housing conditions.

The frequency of the audits shall be risk-based, taking account of the disease history and the prevalence, previous findings, the geographical area, local susceptible wildlife, animal husbandry practices, veterinary supervision and farmers' compliance.

The competent authority shall verify that domestic swine coming from those holdings are examined in accordance with Article 2(1).