12 CFR § 150.300
Where may I deposit fiduciary funds awaiting investment or distribution?
November 10, 2020
(a) Self deposits. You may deposit funds of a fiduciary account that are awaiting investment or distribution in your other departments, unless prohibited by applicable law.
(b) Affiliate deposits. You may also deposit funds of a fiduciary account that are awaiting investment or distribution with an affiliated insured depository institution, unless prohibited by applicable law.