12CFR226.20(a) requires redisclosure if the creditor increases the rate based on a variable rate feature that was not previously disclosed. We have a renewal of a construction loan to an individual that is going from a fixed rate to a variable rate, so we need to give a new TIL. Do you include the original prepaid finance charges disclosed on the original TIL? This is not addressed. Logic says yes, but I've missed the boat using logic before.