9 C.F.R. § 93.600 Importation of dogs.
(a) All dogs. Dogs from any region of the world where screwworm is considered to exist may only be imported into the United States if they meet the requirements of paragraphs (a)(1) and (2) of this section and all other applicable requirements of this part. APHIS maintains a list of regions where screwworm is considered to exist on the APHIS website at https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-and-animal-product-import-information/animal-health-status-of-regions. Copies of the list can be obtained via postal mail or email upon request to Regionalization Evaluation Services, Strategy and Policy, Veterinary Services, Animal and Plant Health Inspection Service, 4700 River Road, Unit 38, Riverdale, Maryland 20737; AskRegionalization@usda.gov. APHIS will add a region to the list upon determining that screwworm exists in the region based on reports APHIS receives of detections of the pest from veterinary officials of the exporting country, from the World Organization for Animal Health (OIE), or from other sources the Administrator determines to be reliable. APHIS will remove a region from the list after conducting an evaluation of the region in accordance with § 92.2 of this subchapter and finding that screwworm is not present in the region. In the case of a region formerly not on this list that is added due to a detection, the region may be removed from the list in accordance with the procedures for reestablishment of a region's disease-free status in § 92.4 of this subchapter.
(1) Dogs must be accompanied by a certificate signed by a full-time salaried veterinary official of the region of origin stating that the dog has been inspected for screwworm within 5 days preceding its shipment to the United States.
(2) The certificate must state that the dog is either free from screwworm or was found to be infested with screwworm and was held in quarantine and treated until free from screwworm prior to leaving the region of origin.
(b) Dogs for handling livestock. Collie, Shepherd, and other dogs that are imported from any part of the world except Canada, Mexico, and regions of Central America and the West Indies and that are to be used in the handling of sheep or other livestock must be inspected and quarantined at the port of entry for a sufficient time to determine their freedom from tapeworm (Taenia spp.). If found to be infested with tapeworm, dogs must be treated under the supervision of an inspector at the port of entry until they are free from infestation.