Have you thought of using an entire county, that way you are not arbitrarily omitting LMI CTs or majority/minority CTs? As of yet, our examiners (FDIC) have not commented on how we delineate our AAs. If we have a branch presence in a county then that county is included in an AA. For example if we have branch locations in 6 out of 8 counties in a MSA, then we delineate that AA as the 6 counties were we have a branch. Yes, you need to monitor your lending in those other 2 counties and if deemed necessary change your AA to include. So to answer your question, under estimate as long as you are periodically monitoring lending activities..