Member States shall ensure that, in the event of slaughter pursuant to Article 24, point 2,

• no cattle may leave the herd concerned unless authorization has been given by the competent authorities for the purpose of slaughter without delay,

• leukosis tests are carried out on the herd concerned to confirm that the disease has been eliminated,

• only animals from herds considered by the competent authorities as not infected with leukosis may be used to re-stock the herd.