29 CFR 4043.8: Confidentiality.

In accordance with section 4043(f) of ERISA and § 4901.21(a) of this chapter, any information or documentary material that is not publicly available and is submitted to PBGC pursuant to subpart B or C of this part will not be made public, except as may be relevant to any administrative or judicial action or proceeding or for disclosures to either body of Congress or to any duly authorized committee or subcommittee of the Congress. This provision does not apply to information or material submitted to PBGC pursuant to subpart D of this part, even where the submission serves as an alternative method of compliance with § 4043.25.