If you have Reg E separate already, it need not be redisclosed. You could refer to it as a supplemental disclosure. You could, if desired, restate parts of it in your IB disclosure. If those parts change in the future, you have two updates to do instead of one.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell