(a) An offender commits the crime of sexual abuse of a minor in the second degree if,

1. (1) being 17 years of age or older, the offender engages in sexual penetration with a person who is 13, 14, or 15 years of age and at least four years younger than the offender, or aids, induces, causes, or encourages a person who is 13, 14, or 15 years of age and at least four years younger than the offender to engage in sexual penetration with another person;
2. (2) being 16 years of age or older, the offender engages in sexual contact with a person who is under 13 years of age or aids, induces, causes, or encourages a person under 13 years of age to engage in sexual contact with another person;
3. (3) being 18 years of age or older, the offender engages in sexual contact with a person who is under 18 years of age, and the offender is the victim's natural parent, stepparent, adopted parent, or legal guardian;
4. (4) being 16 years of age or older, the offender aids, induces, causes, or encourages a person who is under 16 years of age to engage in conduct described in AS 11.41.455(a)(2) — (6);

5. (5) being 18 years of age or older, the offender engages in sexual contact with a person who is under 16 years of age, and

   1. (A) the victim at the time of the offense is residing in the same household as the offender and the offender has authority over the victim; or
   2. (B) the offender occupies a position of authority in relation to the victim;
6. (6) being 18 years of age or older, the offender engages in sexual penetration with a person who is 16 or 17 years of age and at least three years younger than the offender, and the offender occupies a position of authority in relation to the victim; or
7. (7) being under 16 years of age, the offender engages in sexual penetration with a person who is under 13 years of age and at least three years younger than the offender.