23.—(1) Where a veterinary inspector knows or suspects that import conditions have not been complied with or there is doubt as to the identity of an animal, he may carry out any veterinary checks on that animal that he deems appropriate.
(2) If the checks confirm that import conditions were not complied with, then the provisions of regulation 21 shall apply as they apply at a border inspection post and, in the case of the exercise of a power to place the animals in quarantine or to isolate them, a veterinary inspector may additionally require the placing in quarantine or isolation of other animals which have been in contact with the imported animals.