1. You are not taking adverse action on the HELOC. You have countered on the refinance. You will make the loan if they agree to a lower credit limit on the HELOC. If they don't want to do that, then you have a denial of the refinance and the HELOC remains as it is.
2. If you are going to take action on the HELOC regardless, then you need to follow the Reg. B, FCRA and 1026.40 requirements, as applicable.
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