18 C.F.R. § 270.506 – Confidentiality.

(a) Except as provided in paragraph (b) of this section, the Commission will accord confidential protection to, and not disclose to the public, any information submitted by a jurisdictional agency under § 270.204, if:
1. (1) The jurisdictional agency, on its own motion or on request of the applicant, afforded such information confidential treatment before the jurisdictional agency; and
2. (2) The agency order or the applicant's request stated grounds for confidential treatment which fall within one of the exemptions described in paragraphs (1) through (9) of 5 U.S.C. 552(b).
(b) Upon receipt of a request for disclosure of information treated as confidential under paragraph (a) of this section, the Commission will determine in accordance with 5 U.S.C. 552 whether the information is exempt. 5 U.S.C. 552(b). If it determines the information is not exempt, the information will be made public. If it determines the information is exempt, the Commission will not make it public unless determines that its conduct of the proceeding to review the jurisdictional agency determination requires making such information available to the public or to particular parties, subject to conditions (including a protective order) as the Commission may prescribe. Before making any information public under this paragraph, the Commission will provide at least 5 days notice to the person who submitted the information.