If you have already provided the CD and then either the APR changes, the loan product changes or you add a prepayment penalty you will need to provide corrected disclosures and ensure the customer receives the revised disclosures 3 business days before closing.
If information you provided on the CD changes but none of the three things listed above changes then you will need to provide corrected disclosures at at or before consummation – there isn’t a new waiting period.