29 CFR §4901.21

1. (a)Records not disclosable. PBGC will not disclose records to the extent prohibited by section 552(b)(1) or (3) of FOIA, sections 4010 and 4043 of ERISA, or other statutes.
2. (b)Records disclosure of which may be refused. Unless prohibited from disclosure by paragraph (a) of this section, PBGC need not but may, as provided in § 4901.5(b), disclose records exempted from FOIA, which include as of August 24, 2022 records under:
   1. (1)Section 552(b)(2) of FOIA, dealing in general with internal agency personnel rules and practices;
   2. (2)Section 552(b)(4) of FOIA, dealing in general with trade secrets and commercial and financial information;
   3. (3)Section 552(b)(5) of FOIA, dealing in general with inter-agency and intra-agency memoranda and letters;
   4. (4)Section 552(b)(6) of FOIA, dealing in general with personnel, medical, and similar files;
   5. (5)Section 552(b)(7) of FOIA, dealing in general with records or information compiled for law enforcement purposes;
   6. (6)Section 552(b)(8) of FOIA, dealing in general with reports on financial institutions; or
   7. (7)Section 552(b)(9) of FOIA, dealing in general with information about wells.