Iowa Code § 633A.4203
A trustee shall administer the trust with the reasonable care, skill, and caution as a prudent person would, by considering the purposes, terms, distribution requirements, and other circumstances of the trust.
99 Acts, ch 125, §49, 109 C2001, §633.4203 2005 Acts, ch 38, §54 CS2005, §633A.4203