Iowa Code § 633A.1104 : JUDICIAL BRANCH AND JUDICIAL PROCEDURES — PROBATE - FIDUCIARIES — Iowa trust code — DEFINITIONS AND GENERAL PROVISIONS — Common law of trusts TEXT PDF Except to the extent that this chapter modifies the common law governing trusts, the common law of trusts shall supplement this trust code. Iowa Code § 633A.1104 99 Acts, ch 125, §4, 109C2001, § 633.1104 2005 Acts, ch 38, §52, 54CS2005, § 633A.1104