(a) In deciding whether to make disclosures pursuant to a demand, the General Counsel, or his designee, may consider, among things:
(1) Whether such disclosure is appropriate under the rules of procedure governing the case or matter in which the demand arose, and
(2) Whether disclosure is appropriate under the relevant substantive law concerning privilege.
(b) Among the demands in response to which disclosure will not be made are those demands with respect to which any of the following factors exist:
(1) Disclosure would violate a statute or a rule of procedure,
(2) Disclosure would violate a specific regulation,
(3) Disclosure would reveal classified information, unless appropriately declassified by the originating agency,
(4) Disclosure would reveal trade secrets or proprietary information without the owner's consent,
(5) Disclosure would otherwise adversely affect the foreign policy interets of the United States or impair the foreign assistance program of the United States, or
(6) Disclosure would impair an ongoing Inspector General or Department of Justice investigation.