I've read both the preamble to the rule and the Interagency Q&A that came out 9/01, and I cannot find it addressed. I can't tell you what we do, because my current employer doesn't sell any type of insurance product during the application process.
If I were establishing a policy, I would probably require each consumer who is actually buying insurance to acknowledge the insurance disclosure. I would probably allow any of the borrowers to acknowledge the credit disclosure.
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Opinions are mine and not necessarily my employer's.