Iowa Code § 513B.4A
A Taft-Hartley trust or a carrier with the written authorization of such a trust may make a written request to the commissioner for an exemption from the application of any provisions of section 513B.4 with respect to health insurance coverage provided to such a trust. The commissioner may grant an exemption if the commissioner finds that application of section 513B.4 with respect to the trust would have a substantial adverse effect on the participants and beneficiaries of such trust, and would require significant modifications to one or more collective bargaining arrangements under which the trust is established or maintained.
An exemption granted under this section shall not apply to an individual if the individual participates in a trust as an associate member of an employee organization.
Iowa Code § 513B.4A