Notwithstanding any measures adopted pursuant to national provisions in the event of leukosis being suspected, Member States shall, when the presence of leukosis is officially confirmed in a herd, take appropriate measures to prevent any spread of the disease and shall ensure in particular that:
any movement of animals from this herd is prohibited, unless authorized by the competent authorities for the purpose of slaughter without delay,
the herd in question is isolated so that the cattle cannot come into contact with cattle not belonging to this herd,
milk from infected cows may only be fed to animals after suitable heat treatment or delivered to a dairy to undergo such treatment; feeding animals with milk which has not undergone heat treatment may be authorized for herds where all animals are to be slaughtered pursuant to Article 24, point 1,
carcases, half-carcases, quarters, pieces and offal from infected animals intended for use as feed for animals are prepared in such a way as to avoid contamination,
official regulations for the control of establishments such as carcase disposal plants ensure that there is no danger of the material produced spreading leukosis,
the farmer notifies the official veterinarian of the death or emergency slaughter of any cattle from his farm.