12 CFR § 712.6
What activities and services are prohibited for CUSOs?
November 10, 2020
General. CUSOs must not acquire control of, either directly or indirectly, another depository financial institution, nor invest in shares, stocks, or obligations of an insurance company, trade association, liquidity facility or similar organization, corporation, or association.
[63 FR 10756, Mar. 5, 1998, as amended at 64 FR 66361, Nov. 26, 1999]