(1) A person is guilty of sexual misconduct with a minor in the first degree when: (a) The person has, or knowingly causes another person under the age of eighteen to have, sexual intercourse with another person who is at least sixteen years old but less than eighteen years old, if the perpetrator is at least sixty months older than the victim, is in a significant relationship to the victim, and abuses a supervisory position within that relationship in order to engage in or cause another person under the age of eighteen to engage in sexual intercourse with the victim; (b) the person is a school employee who has, or knowingly causes another person under the age of eighteen to have, sexual intercourse with an enrolled student of the school who is at least sixteen years old and not more than twenty-one years old, if the employee is at least sixty months older than the student; or (c) the person is a foster parent who has, or knowingly causes another person under the age of eighteen to have, sexual intercourse with his or her foster child who is at least sixteen.
(2) Sexual misconduct with a minor in the first degree is a class C felony.
(3) For the purposes of this section:
(a) "Enrolled student" means any student enrolled at or attending a program hosted or sponsored by a common school as defined in RCW 28A.150.020, or a student enrolled at or attending a program hosted or sponsored by a private school under chapter 28A.195 RCW, or any person who receives home-based instruction under chapter 28A.200 RCW.
(b) "School employee" means an employee of a common school defined in RCW 28A.150.020, or a grade kindergarten through twelve employee of a private school under chapter 28A.195 RCW, who is not enrolled as a student of the common school or private school.