I agree with Randy in that there is no regulatory requirement for a flood policy. Now with that said several of the regulators, especially the FDIC, went on a policy frenzy a few years ago. We put the following in our loan policy as a result of that frenzy:
The bank must perform a Flood Zone Determination for all loan requests to be secured by improved real estate prior to loan closing to determine if it lies in a flood zone. If it is determined that the property is located in a flood zone then the bank must provide the borrower the Notice of Special Flood Hazard and Availability of Federal Disaster Relief Assistance within a reasonable time before closing and require flood insurance in an amount to meet the minimum coverage requirements outlined in the regulation and with the bank listed as the loss payee.
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The opinions expressed are mine and they are not to be taken as legal advice.