There is no direct code reference, but guidelines, and using IRA's in a business owned by the taxpayer is generally a very big "no!"
IRA's in an LLC owned by the taxpayer could still get taken directly from the taxpayer just like any other business interest where the taxpayer is BK as opposed to the business itself. The IRA's do afford some legal protection...
I'm just not seeing this one... have your lawyer clarify.
Thank you for your question.