(a) An actor commits the crime of sexual abuse of a minor in the first degree if:
(i) Being sixteen (16) years of age or older, the actor inflicts sexual intrusion on a victim who is less than thirteen (13) years of age;
(ii) Being eighteen (18) years of age or older, the actor inflicts sexual intrusion on 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;
(iii) Being eighteen (18) years of age or older, the actor inflicts sexual intrusion on 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) Except as provided in subsection (c) of this section, a person convicted under subsection (a) of this section is subject to imprisonment for not more than fifty (50) years, unless the person convicted qualifies under W.S. 6-2-306(e).
(c) A person convicted under paragraph (a)(i) of this section, where the actor is at least twenty-one (21) years of age, is subject to imprisonment for not less than twenty-five (25) years nor more than fifty (50) years, unless the person convicted qualified under W.S. 6-2-306(e).