Iowa Code § 20.31
1. As used in this section, unless the context otherwise requires:
2. A mediator shall not be required to testify in any judicial, administrative, arbitration, or grievance proceeding regarding any matters occurring in the course of a mediation, including any verbal or written communication or behavior, other than facts relating exclusively to the timing or scheduling of mediation. A mediator shall not be required to produce or disclose any documents, including notes, memoranda, or other work product, relating to mediation, other than documents relating exclusively to the timing or scheduling of mediation. This subsection shall not apply in any of the following circumstances:
For provisions relating to applicability of 2017 amendment to collective bargaining agreements and procedures under this chapter before, on, or after February 17, 2017, see 2017 Acts, ch 2, §26, 27
98 Acts, ch 1062, §7; 2017 Acts, ch 2, §17, 26, 27