(a) Except under circumstance constituting sexual abuse of a minor in the first degree as defined by W.S. 6-2-314, an actor commits the crime of sexual abuse of a minor in the second degree if:
(i) Being seventeen (17) years of age or older, the actor inflicts sexual intrusion on a victim who is thirteen (13) through fifteen (15) years of age, and the victim is at least four (4) years younger than the actor;
(ii) Being sixteen (16) years of age or older, the actor engages in sexual contact of a victim who is less than thirteen (13) years of age;
(iii) Being eighteen (18) years of age or older, the actor engages in sexual contact with a victim who is less than eighteen (18) years of age and the actor is the victim's legal guardian or an individual specified in W.S. 6-4-402; or (iv) Being eighteen (18) years of age or older, the actor engages in sexual contact with a victim who is less than sixteen (16) years of age and the actor occupies a position of authority in relation to the victim.
(b) A person convicted under subsection (a) of this section is subject to imprisonment for not more than twenty (20) years, unless the person convicted qualifies under W.S. 6-2-306(e).