(1) The Secretary of Defense shall prescribe regulations requiring that, whenever practicable, each contract requiring the delivery of supplies (other than a contract described in paragraph (2)) shall require that the contractor identify
(A) the actual manufacturer or producer of the item or of all sources of supply of the contractor for that item;
(B) the national stock number of the item (if there is such a number) and the identification number of the actual manufacturer or producer of the item or of each source of supply of the contractor for the item; and
(C) the source of any technical data delivered under the contract.