It is an affirmative defense to prosecution under this chapter that dissemination was:
I. Restricted to institutions or persons having scientific, medical, educational, governmental or other similar justification for possessing a visual representation of a child engaging in sexual activity; or
II. Of the same material available in the same or another form in any public library in the state.
Source. 1983, 448:2. 1998, 361:2, eff. Jan. 1, 1999.