A member bank may not engage
in a transaction described in section 223.52 unless the transaction
is—
(a) on terms and under circumstances, including
credit standards, that are substantially the same, or at least as
favorable to the member bank, as those prevailing at the time for
comparable transactions with or involving nonaffiliates; or
(b) in the absence of comparable transactions, on terms
and under circumstances, including credit standards, that in good
faith would be offered to, or would apply to, nonaffiliates.