Code of Federal Regulations Title 10. Energy § 10.871.1 National security exemption

(1) Shipments made in support of the development, production, testing, sampling, maintenance, repair, modification, or retirement of atomic weapons or devices;

(2) Shipments made pursuant to international agreements for cooperation for mutual defense purposes;  and

(3) Shipments necessary to respond to an emergency situation involving a possible threat to the national security.

(1) The delay resulting from using ground transportation methods would have serious adverse impact upon a national security requirement;

(2) Safeguards or safety considerations dictate the use of air transportation;

(3) The nature of the item to be shipped necessitates the use of air transportation in order to avoid possible damage which may be expected from other available transportation environments;  or

(4) The nature of the item being shipped necessitates rapid shipment by air in order to preserve the chemical, physical, or isotopic properties of the item.