Whoever knowingly purchases or possesses a negative, slide, book, magazine, film, videotape, photograph or other similar visual reproduction, or depiction by computer, of any child whom the person knows or reasonably should know to be under the age of 18 years of age and such child is:

1. (i) actually or by simulation engaged in any act of sexual intercourse with any person or animal;
2. (ii) actually or by simulation engaged in any act of sexual contact involving the sex organs of the child and the mouth, anus or sex organs of the child and the sex organs of another person or animal;
3. (iii) actually or by simulation engaged in any act of masturbation;
4. (iv) actually or by simulation portrayed as being the object of, or otherwise engaged in, any act of lewd fondling, touching, or caressing involving another person or animal;
5. (v) actually or by simulation engaged in any act of excretion or urination within a sexual context;
6. (vi) actually or by simulation portrayed or depicted as bound, fettered, or subject to sadistic, masochistic, or sadomasochistic abuse in any sexual context; or

7. (vii) depicted or portrayed in any pose, posture or setting involving a lewd exhibition of the unclothed genitals, pubic area, buttocks or, if such person is female, a fully or partially developed breast of the child; with knowledge of the nature or content thereof shall be punished by imprisonment in the state prison for not more than five years or in a jail or house of correction for not more than two and one-half years or by a fine of not less than $1,000 nor more than $10,000, or by both such fine and imprisonment for the first offense, not less than five years in a state prison or by a fine of not less than $5,000 nor more than $20,000, or by both such fine and imprisonment for the second offense, not less than 10 years in a state prison or by a fine of not less than $10,000 nor more than $30,000, or by both such fine and imprisonment for the third and subsequent offenses.

   A prosecution commenced under this section shall not be continued without a finding nor placed on file.

   The provisions of this section shall not apply to a law enforcement officer, licensed physician, licensed psychologist, attorney or officer of the court who is in possession of such materials in the lawful performance of his official duty. Nor shall the provisions of this section apply to an employee of a bona fide enterprise, the purpose of which enterprise is to filter or otherwise restrict access to such materials, who possesses examples of computer depictions of such material for the purposes of furthering the legitimate goals of such enterprise.