36 CFR 902.57 - Investigatory files compiled for law enforcement purposes.
(a) Files compiled by the Corporation for law enforcement purposes, including the enforcement of the regulations of the Corporation, are within the statutory exemption to the extent that production of such records would:
(4) Disclose the identity of a confidential source and in the case of a record compiled by a criminal law enforcement authority in the courts of a criminal investigation, or by an agency conducting a lawful national security intelligence investigation, confidential information furnished only by the confidential source;
Title 36 published on 2013-07-01
no entries appear in the Federal Register after this date.