904.310A  Institution reading rooms.
  The director shall, as necessary, provide suitable space for reading material for inmates. For purposes of this section, “reading material” does not include material depicting or describing the genitals, sex acts, masturbation, excretory functions, or sadomasochistic abuse which the average person, taking the material as a whole and applying contemporary community standards with respect to what is suitable material for inmates, would find appeals to the prurient interest and is patently offensive; and the material, taken as a whole, lacks serious literary, scientific, political, or artistic value. The space shall be located so that any visitors, other than those authorized pursuant to section 904.512, shall not be able to view the space or the materials located within that space.
90 Acts, ch 1251, §29
C91, §246.310A
91 Acts, ch 258, §38
C93, §904.310A