Iowa Code § 633A.4208: Cotrustees.

1. If a trust has more than one trustee, each trustee shall perform all of the following duties:

a. Participate in the administration of the trust.

b. Take reasonable steps to prevent a cotrustee from committing a breach of trust, and to compel a cotrustee to redress a breach of trust.

2. A trustee who complies with subsection 1 is not liable to the beneficiaries or to the trust for the decisions or actions of a cotrustee.