17 C.F.R. § 450.3
(a) The Secretary has determined that the rules and standards of the Comptroller of the Currency, the Board of Governors of the Federal Reserve System, and the Federal Deposit Insurance Corporation governing the holding of government securities in a fiduciary capacity by depository institutions subject thereto are adequate. Accordingly, such depository institutions are exempt from this part with respect to their holdings of government securities in a fiduciary capacity and their holdings of government securities in a custodial capacity provided that:
[52 FR 27957, July 24, 1987, as amended at 70 FR 29446, May 23, 2005; 79 FR 38456, July 8, 2014]