45 CFR § 2105.34
Can an Agency release information protected by Exemption 4?
April 14, 2021
If an Agency determines that the requested information is protected from release by Exemption 4 of the FOIA, the Agency has no discretion to release the information. Release of information protected from release by Exemption 4 is prohibited by the Trade Secrets Act, a criminal provision found at 18 U.S.C. 1905.