Iowa Code § 252E.16: Scope and effect.

1. Unless otherwise specified, the provisions of this chapter take effect July 1, 1990, for all support orders entered pursuant to chapter 234, 252A, 252C, 598, or 600B.

2. If an obligor was ordered to provide a health benefit plan or insurance coverage under an order entered prior to July 1, 1990, but did not comply with the order, insurers are not liable for medical expenses incurred prior to July 1, 1990. However, such an order may be implemented pursuant to the provisions of this chapter following its enactment. This chapter shall not be implemented retroactively; however, previous orders for medical support not otherwise complied with may be reduced to a dollar amount and collected from the obligor.