"Disregard
of rules & regulations"
This
prong may be asserted if you carelessly, recklessly or intentionally
disregard IRS rules and regulations - by taking a position on
your return with little or no effort to determine whether the
position is correct or knowingly taking a position that is incorrect.
Adequate
disclosure on your tax return is not a defense against the negligence
prong of the penalty, but may be a defense against the disregard
prong. However, disclosure alone is not enough - you must show
that there was a reasonable basis for the position.