I'm not sure if it would apply to referrals or not, however my Conservative side says a very definite maybe.
§ 343.10 Purpose and scope.
This part establishes consumer protections in connection with retail sales practices, solicitations, advertising, or offers of any insurance product or annuity to a consumer by:
(a) Any bank; or
(b) Any other person that is engaged in such activities at an office of the bank or on behalf of the bank.
I think what has to be determined is if a referral to an affiliate is a "solicitation" of the insurance product.
The opinions expressed are mine and they are not to be taken as legal advice.