The Secretary or his agent may prohibit the shipment of livestock or poultry into an area in which contagious disease eradication is being carried on until the livestock or poultry have been subjected to a test satisfactory to the Secretary and have been found to be free of any contagious disease. The Secretary may quarantine any animals that may have been brought into the area and require that they be tested as provided in § 3-105 of this subtitle.