Iowa Code § 633A.6304
Unless otherwise represented, a minor, an incompetent, unborn, or unascertained person, or a remote contingent beneficiary may be represented by and bound by another person having a substantially identical interest with respect to the fiduciary matter but only to the extent that the person’s interest is adequately represented.
99 Acts, ch 125, §99, 109 C2001, §633.6304 2005 Acts, ch 38, §54 CS2005, §633A.6304 2022 Acts, ch 1084, §5