9. Where any vaccinated animal is to be introduced to premises outside a vaccination zone–
(a)it shall not be subject to paragraphs 3 to 7; and
(b)if the proportion of vaccinated animals in the animals to be introduced is 75% or greater, then not earlier than 28 days after the last introduction of susceptible animals, the Scottish Ministers shall ensure that the vaccinated animals are randomly tested for the detection of antibodies against non-structural proteins.