12 C.F.R. § 333.101
(b) An insured State nonmember bank or State savings association, not exercising trust powers, may act as trustee or custodian of Individual Retirement Accounts established pursuant to the Employee Retirement Income Security Act of 1974 (26 U.S.C. 408), Self-Employed Retirement Plans established pursuant to the Self-Employed Individuals Retirement Act of 1962 (26 U.S.C. 401), Roth Individual Retirement Accounts and Coverdell Education Savings Accounts established pursuant to the Taxpayer Relief Act of 1997 (26 U.S.C. 408A and 530 respectively), Health Savings Accounts established pursuant to the Medicare Prescription Drug Improvement and Modernization Act of 2003 (26 U.S.C. 223), and other similar accounts without the prior written consent of the Corporation provided:
(2) The bank or savings association is required to invest the funds from such plans only
[41 FR 2375, Jan. 16, 1976, as amended at 50 FR 10754, Mar. 18, 1985; 70 FR 60422, Oct. 18, 2005; 83 FR 60337, Nov. 26, 2018]