The measures provided for in this Section shall be maintained:
at least 21 days following the date of completion of preliminary cleansing and disinfection of the infected holding by one or more of the procedures set down in Article 48, and until the competent authorities, based on the investigations and laboratory tests carried out in the restricted zone in accordance with the diagnostic manual and a risk assessment, consider that the risk of spread of LPAI is negligible;
at least 42 days following the date of confirmation of the outbreak and until the competent authorities, based on the investigations and laboratory tests carried out in the restricted zone in accordance with the diagnostic manual and a risk assessment, consider that the risk of spread of LPAI is negligible; or
for any other duration and under conditions to be established in accordance with the procedure referred to in Article 64(3).