Iowa Code § 635.8
89 Acts, ch 25, §4; 2007 Acts, ch 134, § 24, 28; 2008 Acts, ch 1119, § 36; 2009 Acts, ch 52, §11, 14; 2012 Acts, ch 1123, §31; 2018 Acts, ch 1140, § 5, 6, 8 2018 amendment applies July 1, 2018, to estates of decedents dying on or after July 1, 2018, and other estates opened previously and for which administration has not been completed as of July 1, 2018; 2018 Acts, ch 1140, § 8