Iowa Code § 904.515
The provisions of chapter 141A relating to knowledge and consent do not apply to persons committed to the custody of the department. The department may provide for medically acceptable procedures to inform employees, visitors, and persons committed to the department of possible infection and to protect them from possible infection.
88 Acts, ch 1234, §6 C89, §246.515 C93, §904.515 99 Acts, ch 181, §18