573.037.  Possession of child pornography — penalty. — 1.  A person commits the offense of possession of child pornography if such person knowingly or recklessly possesses any child pornography of a minor less than eighteen years of age or obscene material portraying what appears to be a minor less than eighteen years of age.

  2.  The offense of possession of child pornography is a class D felony if the person possesses one still image of child pornography or one obscene still image.  The offense of possession of child pornography is a class B felony if the person:

  (1)  Possesses:

  (a)  More than twenty still images of child pornography; or

  (b)  More than twenty obscene still images; or

  (c)  Child pornography comprised of one motion picture, film, videotape, videotape production, or other moving image; or

  (d)  Obscene material comprised of one motion picture, film, videotape production, or other moving image; or

  (2)  Has previously been found guilty of an offense under this section.

  3.  A person who has committed the offense of possession of child pornography is subject to separate punishments for each item of child pornography or obscene material possessed by the person.